diff --git a/README.md b/README.md
index 97a39ce..329cacf 100644
--- a/README.md
+++ b/README.md
@@ -48,14 +48,13 @@ Master always contains latest code, so better use some package manager to vendor
 - Key types should be chosen according to OpenRTB specification (attribute types)
 - Numeric types:
 	- `int8` - short enums (with values <= 127), boolean-like attributes (like `BidRequest.test`)
-	- `int64` - time, duration, length, unbound enums (like `BidRequest.at` - exchange-specific auctions types are > 500)
-	- `uint64` - width, height, bitrate etc. (unbound positive numbers)
+	- `int64` - every other integral type
 	- `float64` - coordinates, prices etc.
 - Enums:
 	- all enums, described in section 5, must be typed with section name singularized (e.g., "5.2 Banner Ad Types" -> `type BannerAdType int8`)
 	- all typed enums must have constants for each element, prefixed with type name (e.g., "5.2 Banner Ad Types - XHTML Text Ad (usually mobile)" -> `const BannerAdTypeXHTMLTextAd BannerAdType = 1`)
 	- never use `iota` for enum constants
-	- section "5.1 Content Categories" should remain untyped and have no constants
+	- OpenRTB (2.x) section "5.1 Content Categories" should remain untyped and have no constants
 
 ## Pointers/omitempty
 Pointer | Omitempty | When to use                                                          | Example
diff --git a/adcom1/audio_placement.go b/adcom1/audio_placement.go
index 1eeb604..58654ad 100644
--- a/adcom1/audio_placement.go
+++ b/adcom1/audio_placement.go
@@ -134,7 +134,7 @@ type AudioPlacement struct {
 	//   integer
 	// Definition:
 	//   Minimum bit rate of the creative in Kbps.
-	MinBitR uint64 `json:"minbitr,omitempty"`
+	MinBitR int64 `json:"minbitr,omitempty"`
 
 	// Attribute:
 	//   maxbitr
@@ -142,7 +142,7 @@ type AudioPlacement struct {
 	//   integer
 	// Definition:
 	//   Maximum bit rate of the creative in Kbps.
-	MaxBitR uint64 `json:"maxbitr,omitempty"`
+	MaxBitR int64 `json:"maxbitr,omitempty"`
 
 	// Attribute:
 	//   delivery
@@ -160,7 +160,7 @@ type AudioPlacement struct {
 	//   integer
 	// Definition:
 	//   The maximum number of ads that can be played in an ad pod.
-	MaxSeq int `json:"maxseq,omitempty"`
+	MaxSeq int64 `json:"maxseq,omitempty"`
 
 	// Attribute:
 	//   comp
diff --git a/adcom1/content.go b/adcom1/content.go
index ceaaa34..701363b 100644
--- a/adcom1/content.go
+++ b/adcom1/content.go
@@ -20,7 +20,7 @@ type Content struct {
 	//   integer
 	// Definition:
 	//   Episode number.
-	Episode uint16 `json:"episode,omitempty"`
+	Episode int64 `json:"episode,omitempty"`
 
 	// Attribute:
 	//   title
diff --git a/adcom1/data_asset.go b/adcom1/data_asset.go
index ab63f5a..c6b73c0 100644
--- a/adcom1/data_asset.go
+++ b/adcom1/data_asset.go
@@ -21,7 +21,7 @@ type DataAsset struct {
 	// Definition:
 	//   The length of the value contents.
 	//   This length should conform to recommendations provided in List: Native Data Asset Types
-	Len int `json:"len,omitempty"`
+	Len int64 `json:"len,omitempty"`
 
 	// Attribute:
 	//   type
diff --git a/adcom1/data_asset_format.go b/adcom1/data_asset_format.go
index 92ddaa8..8ec7f1b 100644
--- a/adcom1/data_asset_format.go
+++ b/adcom1/data_asset_format.go
@@ -21,7 +21,7 @@ type DataAssetFormat struct {
 	//   integer
 	// Definition:
 	//   The maximum allowed length of the data value.
-	Len int `json:"len,omitempty"`
+	Len int64 `json:"len,omitempty"`
 
 	// Attribute:
 	//   ext
diff --git a/adcom1/device.go b/adcom1/device.go
index 9a21e92..58e09d3 100644
--- a/adcom1/device.go
+++ b/adcom1/device.go
@@ -95,7 +95,7 @@ type Device struct {
 	//   integer
 	// Definition:
 	//   Physical height of the screen in pixels.
-	H uint64 `json:"h,omitempty"`
+	H int64 `json:"h,omitempty"`
 
 	// Attribute:
 	//   w
@@ -103,7 +103,7 @@ type Device struct {
 	//   integer
 	// Definition:
 	//   Physical width of the screen in pixels.
-	W uint64 `json:"w,omitempty"`
+	W int64 `json:"w,omitempty"`
 
 	// Attribute:
 	//   ppi
@@ -111,7 +111,7 @@ type Device struct {
 	//   integer
 	// Definition:
 	//   Screen size as pixels per linear inch.
-	PPI uint16 `json:"ppi,omitempty"`
+	PPI int64 `json:"ppi,omitempty"`
 
 	// Attribute:
 	//   pxratio
diff --git a/adcom1/display.go b/adcom1/display.go
index 638781b..fe78b5b 100644
--- a/adcom1/display.go
+++ b/adcom1/display.go
@@ -40,7 +40,7 @@ type Display struct {
 	// Definition:
 	//   Absolute width of the creative in device independent pixels (DIPS), typically for non-native ads.
 	//   Note that mixing absolute and relative sizes is not recommended.
-	W uint64 `json:"w,omitempty"`
+	W int64 `json:"w,omitempty"`
 
 	// Attribute:
 	//   h
@@ -49,7 +49,7 @@ type Display struct {
 	// Definition:
 	//   Absolute height of the creative in device independent pixels (DIPS), typically for non-native ads.
 	//   Note that mixing absolute and relative sizes is not recommended.
-	H uint64 `json:"h,omitempty"`
+	H int64 `json:"h,omitempty"`
 
 	// Attribute:
 	//   wratio
@@ -59,8 +59,8 @@ type Display struct {
 	//   Relative width of the creative when expressing size as a ratio, typically for non-native ads.
 	//   Note that mixing absolute and relative sizes is not recommended.
 	// Dev note:
-	//   This is kept as `uint8` because ratio values are expected to be quite small (like 16:9).
-	WRatio uint8 `json:"wratio,omitempty"`
+	//   This is kept as `int8` because ratio values are expected to be quite small (like 16:9).
+	WRatio int8 `json:"wratio,omitempty"`
 
 	// Attribute:
 	//   hratio
@@ -70,8 +70,8 @@ type Display struct {
 	//   Relative height of the creative when expressing size as a ratio, typically for non-native ads.
 	//   Note that mixing absolute and relative sizes is not recommended.
 	// Dev note:
-	//   This is kept as `uint8` because ratio values are expected to be quite small (like 16:9).
-	HRatio uint8 `json:"hratio,omitempty"`
+	//   This is kept as `int8` because ratio values are expected to be quite small (like 16:9).
+	HRatio int8 `json:"hratio,omitempty"`
 
 	// Attribute:
 	//   priv
diff --git a/adcom1/display_format.go b/adcom1/display_format.go
index 1180445..08273a2 100644
--- a/adcom1/display_format.go
+++ b/adcom1/display_format.go
@@ -11,7 +11,7 @@ type DisplayFormat struct {
 	// Definition:
 	//   Absolute width of the creative in units specified by DisplayPlacement.unit.
 	//   Note that mixing absolute and relative sizes is not recommended.
-	W uint64 `json:"w,omitempty"`
+	W int64 `json:"w,omitempty"`
 
 	// Attribute:
 	//   h
@@ -20,7 +20,7 @@ type DisplayFormat struct {
 	// Definition:
 	//   Absolute height of the creative in units specified by DisplayPlacement.unit.
 	//   Note that mixing absolute and relative sizes is not recommended.
-	H uint64 `json:"h,omitempty"`
+	H int64 `json:"h,omitempty"`
 
 	// Attribute:
 	//   wratio
@@ -30,8 +30,8 @@ type DisplayFormat struct {
 	//   Relative width of the creative when expressing size as a ratio.
 	//   Note that mixing absolute and relative sizes is not recommended.
 	// Dev note:
-	//   This is kept as `uint8` because ratio values are expected to be quite small (like 16:9).
-	WRatio uint8 `json:"wratio,omitempty"`
+	//   This is kept as `int8` because ratio values are expected to be quite small (like 16:9).
+	WRatio int8 `json:"wratio,omitempty"`
 
 	// Attribute:
 	//   hratio
@@ -41,8 +41,8 @@ type DisplayFormat struct {
 	//   Relative height of the creative when expressing size as a ratio.
 	//   Note that mixing absolute and relative sizes is not recommended.
 	// Dev note:
-	//   This is kept as `uint8` because ratio values are expected to be quite small (like 16:9).
-	HRatio uint8 `json:"hratio,omitempty"`
+	//   This is kept as `int8` because ratio values are expected to be quite small (like 16:9).
+	HRatio int8 `json:"hratio,omitempty"`
 
 	// Attribute:
 	//   expdir
diff --git a/adcom1/display_placement.go b/adcom1/display_placement.go
index f0064c3..36c58bf 100644
--- a/adcom1/display_placement.go
+++ b/adcom1/display_placement.go
@@ -110,7 +110,7 @@ type DisplayPlacement struct {
 	// Definition:
 	//   Width of the placement in units specified by unit.
 	//   Note that this size applies to the placement itself; permitted creative sizes are specified elsewhere (e.g., DisplayFormat, ImageAssetFormat, etc.).
-	W uint64 `json:"w,omitempty"`
+	W int64 `json:"w,omitempty"`
 
 	// Attribute:
 	//   h
@@ -119,7 +119,7 @@ type DisplayPlacement struct {
 	// Definition:
 	//   Width of the placement in units specified by unit.
 	//   Note that this size applies to the placement itself; permitted creative sizes are specified elsewhere (e.g., DisplayFormat, ImageAssetFormat, etc.).
-	H uint64 `json:"h,omitempty"`
+	H int64 `json:"h,omitempty"`
 
 	// Attribute:
 	//   unit
diff --git a/adcom1/dooh.go b/adcom1/dooh.go
index 8c487d4..9e301ff 100644
--- a/adcom1/dooh.go
+++ b/adcom1/dooh.go
@@ -38,7 +38,7 @@ type DOOH struct {
 	//   integer
 	// Definition:
 	//   Minimum DPI for text-based creative elements to display clearly.
-	DPI uint16 `json:"dpi,omitempty"`
+	DPI int64 `json:"dpi,omitempty"`
 
 	// Attribute:
 	//   ext
diff --git a/adcom1/geo.go b/adcom1/geo.go
index ea90812..bc6b79e 100644
--- a/adcom1/geo.go
+++ b/adcom1/geo.go
@@ -113,9 +113,7 @@ type Geo struct {
 	//   integer
 	// Definition:
 	//   Local time as the number +/- of minutes from UTC.
-	// Dev note:
-	//   This field is kept as `int` to follow type choice for timezone offset in std. `time` package.
-	UTCOffset int `json:"utcoffset,omitempty"`
+	UTCOffset int64 `json:"utcoffset,omitempty"`
 
 	// Attribute:
 	//   ext
diff --git a/adcom1/image_asset.go b/adcom1/image_asset.go
index 0b686b4..b3e7308 100644
--- a/adcom1/image_asset.go
+++ b/adcom1/image_asset.go
@@ -19,7 +19,7 @@ type ImageAsset struct {
 	//   integer; recommended
 	// Definition:
 	//   Width of the image asset in device independent pixels (DIPS).
-	W uint64 `json:"w,omitempty"`
+	W int64 `json:"w,omitempty"`
 
 	// Attribute:
 	//   h
@@ -27,7 +27,7 @@ type ImageAsset struct {
 	//   integer; recommended
 	// Definition:
 	//   Height of the image asset in device independent pixels (DIPS).
-	H uint64 `json:"h,omitempty"`
+	H int64 `json:"h,omitempty"`
 
 	// Attribute:
 	//   type
diff --git a/adcom1/image_asset_format.go b/adcom1/image_asset_format.go
index 4682ab0..5099fad 100644
--- a/adcom1/image_asset_format.go
+++ b/adcom1/image_asset_format.go
@@ -30,7 +30,7 @@ type ImageAssetFormat struct {
 	// Definition:
 	//   Absolute width of the image asset in device independent pixels (DIPS).
 	//   Note that mixing absolute and relative sizes is not recommended.
-	W uint64 `json:"w,omitempty"`
+	W int64 `json:"w,omitempty"`
 
 	// Attribute:
 	//   h
@@ -39,7 +39,7 @@ type ImageAssetFormat struct {
 	// Definition:
 	//   Absolute height of the image asset in device independent pixels (DIPS).
 	//   Note that mixing absolute and relative sizes is not recommended.
-	H uint64 `json:"h,omitempty"`
+	H int64 `json:"h,omitempty"`
 
 	// Attribute:
 	//   wmin
@@ -48,7 +48,7 @@ type ImageAssetFormat struct {
 	// Definition:
 	//   The minimum requested absolute width of the image in device independent pixels (DIPS).
 	//   This option should be used for any scaling of images by the client.
-	WMin uint64 `json:"wmin,omitempty"`
+	WMin int64 `json:"wmin,omitempty"`
 
 	// Attribute:
 	//   hmin
@@ -57,7 +57,7 @@ type ImageAssetFormat struct {
 	// Definition:
 	//   The minimum requested absolute height of the image in device independent pixels (DIPS).
 	//   This option should be used for any scaling of images by the client.
-	HMin uint64 `json:"hmin,omitempty"`
+	HMin int64 `json:"hmin,omitempty"`
 
 	// Attribute:
 	//   wratio
@@ -67,8 +67,8 @@ type ImageAssetFormat struct {
 	//   Relative width of the image asset when expressing size as a ratio.
 	//   Note that mixing absolute and relative sizes is not recommended.
 	// Dev note:
-	//   This is kept as `uint8` because ratio values are expected to be quite small (like 16:9).
-	WRatio uint8 `json:"wratio,omitempty"`
+	//   This is kept as `int8` because ratio values are expected to be quite small (like 16:9).
+	WRatio int8 `json:"wratio,omitempty"`
 
 	// Attribute:
 	//   hratio
@@ -78,8 +78,8 @@ type ImageAssetFormat struct {
 	//   Relative height of the image asset when expressing size as a ratio.
 	//   Note that mixing absolute and relative sizes is not recommended.
 	// Dev note:
-	//   This is kept as `uint8` because ratio values are expected to be quite small (like 16:9).
-	HRatio uint8 `json:"hratio,omitempty"`
+	//   This is kept as `int8` because ratio values are expected to be quite small (like 16:9).
+	HRatio int8 `json:"hratio,omitempty"`
 
 	// Attribute:
 	//   ext
diff --git a/adcom1/title_asset.go b/adcom1/title_asset.go
index b35e1aa..cd51da7 100644
--- a/adcom1/title_asset.go
+++ b/adcom1/title_asset.go
@@ -18,7 +18,7 @@ type TitleAsset struct {
 	//   integer
 	// Definition:
 	//   The length of the contents of the text attribute.
-	Len int `json:"len,omitempty"`
+	Len int64 `json:"len,omitempty"`
 
 	// Attribute:
 	//   ext
diff --git a/adcom1/title_asset_format.go b/adcom1/title_asset_format.go
index 92689be..29cce4a 100644
--- a/adcom1/title_asset_format.go
+++ b/adcom1/title_asset_format.go
@@ -12,7 +12,7 @@ type TitleAssetFormat struct {
 	// Definition:
 	//   The maximum allowed length of the title value.
 	//   Recommended lengths are 25, 90, or 140.
-	Len int `json:"len,omitempty"`
+	Len int64 `json:"len,omitempty"`
 
 	// Attribute:
 	//   ext
diff --git a/adcom1/user.go b/adcom1/user.go
index e459c17..a12b096 100644
--- a/adcom1/user.go
+++ b/adcom1/user.go
@@ -30,7 +30,7 @@ type User struct {
 	//   integer
 	// Definition:
 	//   Year of birth as a 4-digit integer.
-	YOB uint16 `json:"yob,omitempty"`
+	YOB int64 `json:"yob,omitempty"`
 
 	// Attribute:
 	//   gender
diff --git a/adcom1/video_placement.go b/adcom1/video_placement.go
index 726febb..c89fa53 100644
--- a/adcom1/video_placement.go
+++ b/adcom1/video_placement.go
@@ -116,7 +116,7 @@ type VideoPlacement struct {
 	//   integer
 	// Definition:
 	//   Width of the placement in units specified by unit.
-	W uint64 `json:"w,omitempty"`
+	W int64 `json:"w,omitempty"`
 
 	// Attribute:
 	//   h
@@ -124,7 +124,7 @@ type VideoPlacement struct {
 	//   integer
 	// Definition:
 	//   Height of the placement in units specified by unit.
-	H uint64 `json:"h,omitempty"`
+	H int64 `json:"h,omitempty"`
 
 	// Attribute:
 	//   unit
@@ -168,7 +168,7 @@ type VideoPlacement struct {
 	//   integer
 	// Definition:
 	//   Minimum bit rate of the creative in Kbps.
-	MinBitR uint64 `json:"minbitr,omitempty"`
+	MinBitR int64 `json:"minbitr,omitempty"`
 
 	// Attribute:
 	//   maxbitr
@@ -176,7 +176,7 @@ type VideoPlacement struct {
 	//   integer
 	// Definition:
 	//   Maximum bit rate of the creative in Kbps.
-	MaxBitR uint64 `json:"maxbitr,omitempty"`
+	MaxBitR int64 `json:"maxbitr,omitempty"`
 
 	// Attribute:
 	//   delivery
@@ -194,7 +194,7 @@ type VideoPlacement struct {
 	//   integer
 	// Definition:
 	//   The maximum number of ads that can be played in an ad pod.
-	MaxSeq int `json:"maxseq,omitempty"`
+	MaxSeq int64 `json:"maxseq,omitempty"`
 
 	// Attribute:
 	//   linear
diff --git a/native1/request/image.go b/native1/request/image.go
index d7d7830..a1c29eb 100644
--- a/native1/request/image.go
+++ b/native1/request/image.go
@@ -32,7 +32,7 @@ type Image struct {
 	//   integer
 	// Description:
 	//   Width of the image in pixels.
-	W uint64 `json:"w,omitempty"`
+	W int64 `json:"w,omitempty"`
 
 	// Field:
 	//   wmin
@@ -45,7 +45,7 @@ type Image struct {
 	//   This option should be used for any rescaling of images by the client.
 	//   Either w or wmin should be transmitted.
 	//   If only w is included, it should be considered an exact requirement.
-	WMin uint64 `json:"wmin,omitempty"`
+	WMin int64 `json:"wmin,omitempty"`
 
 	// Field:
 	//   h
@@ -55,7 +55,7 @@ type Image struct {
 	//   integer
 	// Description:
 	//   Height of the image in pixels.
-	H uint64 `json:"h,omitempty"`
+	H int64 `json:"h,omitempty"`
 
 	// Field:
 	//   hmin
@@ -68,7 +68,7 @@ type Image struct {
 	// This option should be used for any rescaling of images by the client.
 	// Either h or hmin should be transmitted.
 	// If only h is included, it should be considered an exact requirement.
-	HMin uint64 `json:"hmin,omitempty"`
+	HMin int64 `json:"hmin,omitempty"`
 
 	// Field:
 	//   mimes
diff --git a/native1/response/image.go b/native1/response/image.go
index 0ae83c4..0629515 100644
--- a/native1/response/image.go
+++ b/native1/response/image.go
@@ -44,7 +44,7 @@ type Image struct {
 	//   Width of the image in pixels.
 	//   Recommended for embedded asset responses.
 	//   Required for assetsurl/dcourlresponses if multiple assets of same type submitted.
-	W uint64 `json:"w,omitempty"`
+	W int64 `json:"w,omitempty"`
 
 	// Field:
 	//   h
@@ -56,7 +56,7 @@ type Image struct {
 	//   Height of the image in pixels.
 	//   Recommended for embedded asset responses.
 	//   Required for assetsurl/dcourl responses if multiple assets of same type submitted.
-	H uint64 `json:"h,omitempty"`
+	H int64 `json:"h,omitempty"`
 
 	// Field:
 	//   ext
diff --git a/openrtb2/audio.go b/openrtb2/audio.go
index 9eec597..9b2ac5a 100644
--- a/openrtb2/audio.go
+++ b/openrtb2/audio.go
@@ -63,7 +63,7 @@ type Audio struct {
 	//   If multiple ad impressions are offered in the same bid request,
 	//   the sequence number will allow for the coordinated delivery
 	//   of multiple creatives.
-	Sequence uint64 `json:"sequence,omitempty"`
+	Sequence int64 `json:"sequence,omitempty"`
 
 	// Attribute:
 	//   battr
@@ -91,7 +91,7 @@ type Audio struct {
 	//   integer
 	// Description:
 	//   Minimum bit rate in Kbps.
-	MinBitrate uint64 `json:"minbitrate,omitempty"`
+	MinBitrate int64 `json:"minbitrate,omitempty"`
 
 	// Attribute:
 	//   maxbitrate
@@ -99,7 +99,7 @@ type Audio struct {
 	//   integer
 	// Description:
 	//   Maximum bit rate in Kbps.
-	MaxBitrate uint64 `json:"maxbitrate,omitempty"`
+	MaxBitrate int64 `json:"maxbitrate,omitempty"`
 
 	// Attribute:
 	//   delivery
@@ -147,7 +147,7 @@ type Audio struct {
 	//   The maximum number of ads that can be played in an ad pod.
 	//   OpenRTB API Specification Version 2.5 IAB Technology Lab
 	//   www.iab.com/openrtb Page 18
-	MaxSeq uint64 `json:"maxseq,omitempty"`
+	MaxSeq int64 `json:"maxseq,omitempty"`
 
 	// Attribute:
 	//   feed
diff --git a/openrtb2/banner.go b/openrtb2/banner.go
index 2005be7..23fc078 100644
--- a/openrtb2/banner.go
+++ b/openrtb2/banner.go
@@ -30,7 +30,7 @@ type Banner struct {
 	// Description:
 	//   Exact width in device independent pixels (DIPS);
 	//   recommended if no format objects are specified.
-	W *uint64 `json:"w,omitempty"`
+	W *int64 `json:"w,omitempty"`
 
 	// Attribute:
 	//   h
@@ -39,7 +39,7 @@ type Banner struct {
 	// Description:
 	//   Exact height in device independent pixels (DIPS);
 	//   recommended if no format objects are specified.
-	H *uint64 `json:"h,omitempty"`
+	H *int64 `json:"h,omitempty"`
 
 	// Attribute:
 	//   wmax
@@ -48,7 +48,7 @@ type Banner struct {
 	// Description:
 	//   NOTE: Deprecated in favor of the format array.
 	//   Maximum width in device independent pixels (DIPS).
-	WMax uint64 `json:"wmax,omitempty"`
+	WMax int64 `json:"wmax,omitempty"`
 
 	// Attribute:
 	//   hmax
@@ -57,7 +57,7 @@ type Banner struct {
 	// Description:
 	//   NOTE: Deprecated in favor of the format array.
 	//   Maximum height in device independent pixels (DIPS).
-	HMax uint64 `json:"hmax,omitempty"`
+	HMax int64 `json:"hmax,omitempty"`
 
 	// Attribute:
 	//   wmin
@@ -66,7 +66,7 @@ type Banner struct {
 	// Description:
 	//   NOTE: Deprecated in favor of the format array.
 	//   Minimum width in device independent pixels (DIPS).
-	WMin uint64 `json:"wmin,omitempty"`
+	WMin int64 `json:"wmin,omitempty"`
 
 	// Attribute:
 	//   hmin
@@ -75,7 +75,7 @@ type Banner struct {
 	// Description:
 	//   NOTE: Deprecated in favor of the format array.
 	//   Minimum height in device independent pixels (DIPS).
-	HMin uint64 `json:"hmin,omitempty"`
+	HMin int64 `json:"hmin,omitempty"`
 
 	// Attribute:
 	//   btype
diff --git a/openrtb2/bid.go b/openrtb2/bid.go
index 47c47a9..d4e7b5c 100644
--- a/openrtb2/bid.go
+++ b/openrtb2/bid.go
@@ -232,7 +232,7 @@ type Bid struct {
 	//   integer
 	// Description:
 	//   Width of the creative in device independent pixels (DIPS).
-	W uint64 `json:"w,omitempty"`
+	W int64 `json:"w,omitempty"`
 
 	// Attribute:
 	//   h
@@ -240,7 +240,7 @@ type Bid struct {
 	//   integer
 	// Description:
 	//   Height of the creative in device independent pixels (DIPS).
-	H uint64 `json:"h,omitempty"`
+	H int64 `json:"h,omitempty"`
 
 	// Attribute:
 	//   wratio
@@ -249,7 +249,7 @@ type Bid struct {
 	// Description:
 	//   Relative width of the creative when expressing size as a ratio.
 	//   Required for Flex Ads.
-	WRatio uint64 `json:"wratio,omitempty"`
+	WRatio int64 `json:"wratio,omitempty"`
 
 	// Attribute:
 	//   hratio
@@ -258,7 +258,7 @@ type Bid struct {
 	// Description:
 	//   Relative height of the creative when expressing size as a ratio.
 	//   Required for Flex Ads.
-	HRatio uint64 `json:"hratio,omitempty"`
+	HRatio int64 `json:"hratio,omitempty"`
 
 	// Attribute:
 	//   exp
diff --git a/openrtb2/content.go b/openrtb2/content.go
index 8790e73..7e59c71 100644
--- a/openrtb2/content.go
+++ b/openrtb2/content.go
@@ -24,7 +24,7 @@ type Content struct {
 	//   integer
 	// Description:
 	//   Episode number.
-	Episode uint64 `json:"episode,omitempty"`
+	Episode int64 `json:"episode,omitempty"`
 
 	// Attribute:
 	//   title
diff --git a/openrtb2/device.go b/openrtb2/device.go
index 5128f26..a356976 100644
--- a/openrtb2/device.go
+++ b/openrtb2/device.go
@@ -123,7 +123,7 @@ type Device struct {
 	//   integer
 	// Description:
 	//   Physical height of the screen in pixels.
-	H uint64 `json:"h,omitempty"`
+	H int64 `json:"h,omitempty"`
 
 	// Attribute:
 	//   w
@@ -131,7 +131,7 @@ type Device struct {
 	//   integer
 	// Description:
 	//   Physical width of the screen in pixels.
-	W uint64 `json:"w,omitempty"`
+	W int64 `json:"w,omitempty"`
 
 	// Attribute:
 	//   ppi
@@ -139,7 +139,7 @@ type Device struct {
 	//   integer
 	// Description:
 	//   Screen size as pixels per linear inch.
-	PPI uint64 `json:"ppi,omitempty"`
+	PPI int64 `json:"ppi,omitempty"`
 
 	// Attribute:
 	//   pxratio
diff --git a/openrtb2/format.go b/openrtb2/format.go
index 6628348..eb97101 100644
--- a/openrtb2/format.go
+++ b/openrtb2/format.go
@@ -15,7 +15,7 @@ type Format struct {
 	//   integer
 	// Description:
 	//   Width in device independent pixels (DIPS).
-	W uint64 `json:"w,omitempty"`
+	W int64 `json:"w,omitempty"`
 
 	// Attribute:
 	//   h
@@ -23,7 +23,7 @@ type Format struct {
 	//   integer
 	// Description:
 	//   Height in device independent pixels (DIPS).
-	H uint64 `json:"h,omitempty"`
+	H int64 `json:"h,omitempty"`
 
 	// Attribute:
 	//   wratio
@@ -31,7 +31,7 @@ type Format struct {
 	//   integer
 	// Description:
 	//   Relative width when expressing size as a ratio
-	WRatio uint64 `json:"wratio,omitempty"`
+	WRatio int64 `json:"wratio,omitempty"`
 
 	// Attribute:
 	//   hratio
@@ -39,7 +39,7 @@ type Format struct {
 	//   Integer
 	// Description:
 	//   Relative height when expressing size as a ratio.
-	HRatio uint64 `json:"hratio,omitempty"`
+	HRatio int64 `json:"hratio,omitempty"`
 
 	// Attribute:
 	//   wmin
@@ -48,7 +48,7 @@ type Format struct {
 	// Description:
 	//   The minimum width in device independent pixels (DIPS) at
 	//   which the ad will be displayed the size is expressed as a ratio.
-	WMin uint64 `json:"wmin,omitempty"`
+	WMin int64 `json:"wmin,omitempty"`
 
 	// Attribute:
 	//   ext
diff --git a/openrtb2/geo.go b/openrtb2/geo.go
index cad1ee3..0417f9d 100644
--- a/openrtb2/geo.go
+++ b/openrtb2/geo.go
@@ -48,7 +48,7 @@ type Geo struct {
 	//   services (i.e., type = 1). Note that this is the accuracy as
 	//   reported from the device. Consult OS specific documentation
 	//   (e.g., Android, iOS) for exact interpretation.
-	Accuracy uint64 `json:"accuracy,omitempty"`
+	Accuracy int64 `json:"accuracy,omitempty"`
 
 	// Attribute:
 	//   lastfix
diff --git a/openrtb2/ptr.go b/openrtb2/ptr.go
index 4b6d364..79b82c6 100644
--- a/openrtb2/ptr.go
+++ b/openrtb2/ptr.go
@@ -5,7 +5,7 @@ func Int8Ptr(n int8) *int8 {
 	return &n
 }
 
-// Uint64Ptr returns pointer to passed argument.
-func Uint64Ptr(n uint64) *uint64 {
+// Int64Ptr returns pointer to passed argument.
+func Int64Ptr(n int64) *int64 {
 	return &n
 }
diff --git a/openrtb2/video.go b/openrtb2/video.go
index 488411e..19702e0 100644
--- a/openrtb2/video.go
+++ b/openrtb2/video.go
@@ -66,7 +66,7 @@ type Video struct {
 	//   integer; recommended
 	// Description:
 	//   Width of the video player in device independent pixels (DIPS).
-	W uint64 `json:"w,omitempty"`
+	W int64 `json:"w,omitempty"`
 
 	// Attribute:
 	//   h
@@ -74,7 +74,7 @@ type Video struct {
 	//   integer; recommended
 	// Description:
 	//   Height of the video player in device independent pixels (DIPS).
-	H uint64 `json:"h,omitempty"`
+	H int64 `json:"h,omitempty"`
 
 	// Attribute:
 	//   startdelay
@@ -169,7 +169,7 @@ type Video struct {
 	//   integer
 	// Description:
 	//   Minimum bit rate in Kbps.
-	MinBitRate uint64 `json:"minbitrate,omitempty"`
+	MinBitRate int64 `json:"minbitrate,omitempty"`
 
 	// Attribute:
 	//   maxbitrate
@@ -177,7 +177,7 @@ type Video struct {
 	//   integer
 	// Description:
 	//   Maximum bit rate in Kbps.
-	MaxBitRate uint64 `json:"maxbitrate,omitempty"`
+	MaxBitRate int64 `json:"maxbitrate,omitempty"`
 
 	// Attribute:
 	//   boxingallowed
diff --git a/openrtb3/item.go b/openrtb3/item.go
index 6d5793a..fd106ba 100644
--- a/openrtb3/item.go
+++ b/openrtb3/item.go
@@ -20,7 +20,7 @@ type Item struct {
 	//   integer; default 1
 	// Definition:
 	//   The number of instances (i.e., “quantity”) of this item being offered (e.g., multiple identical impressions in a digital out-of-home scenario).
-	Qty int `json:"qty,omitempty"`
+	Qty int64 `json:"qty,omitempty"`
 
 	// Attribute:
 	//   seq
@@ -28,7 +28,7 @@ type Item struct {
 	//   integer
 	// Definition:
 	//   If multiple items are offered in the same bid request, the sequence number allows for the coordinated delivery.
-	Seq int `json:"seq,omitempty"`
+	Seq int64 `json:"seq,omitempty"`
 
 	// Attribute:
 	//   flr