diff --git a/go.mod b/go.mod
index 257e144..f804f2b 100644
--- a/go.mod
+++ b/go.mod
@@ -6,7 +6,7 @@ require (
 	github.com/loov/hrtime v1.0.3
 	github.com/mitchellh/mapstructure v1.5.0
 	github.com/paulmach/orb v0.11.1
-	github.com/ringsaturn/go-cities.json v0.6.5
+	github.com/ringsaturn/go-cities.json v0.6.6
 	github.com/ringsaturn/polyf v0.2.2
 	github.com/ringsaturn/tzf-rel-lite v0.0.2024-b
 	github.com/tidwall/geojson v1.4.5
@@ -14,7 +14,7 @@ require (
 	github.com/tidwall/rtree v1.10.0
 	github.com/twpayne/go-polyline v1.1.1
 	golang.org/x/exp v0.0.0-20240314144324-c7f7c6466f7f
-	google.golang.org/protobuf v1.35.1
+	google.golang.org/protobuf v1.35.2
 )
 
 require (
diff --git a/go.sum b/go.sum
index 05b8644..68681a6 100644
--- a/go.sum
+++ b/go.sum
@@ -26,8 +26,8 @@ github.com/paulmach/protoscan v0.2.1/go.mod h1:SpcSwydNLrxUGSDvXvO0P7g7AuhJ7lcKf
 github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/ringsaturn/go-cities.json v0.6.5 h1:FUi/+mDeXf5mcOc5dQf8/UiosXOKo/mLLGpXCGzbF3c=
-github.com/ringsaturn/go-cities.json v0.6.5/go.mod h1:RWApnQPG6nU558XXbY1try5mi9u9Hd667J6vr948VBo=
+github.com/ringsaturn/go-cities.json v0.6.6 h1:zXEsYeQBjgJwKdGHMrq1j8d9uVNxmnbVvi2fAQAyfNM=
+github.com/ringsaturn/go-cities.json v0.6.6/go.mod h1:RWApnQPG6nU558XXbY1try5mi9u9Hd667J6vr948VBo=
 github.com/ringsaturn/polyf v0.2.2 h1:71ua1Giawwpb+bvqFelcZygup+0HFuV5hYLA+8YO2ZM=
 github.com/ringsaturn/polyf v0.2.2/go.mod h1:0+PnAZooWRyH6ULFdxTC86pe15L4VT3e71CQVPG67CE=
 github.com/ringsaturn/tzf-rel-lite v0.0.2024-b h1:5MSi1siISlO4pZQrQmB+hlJID+ipwvKK6EC33rzcFa8=
@@ -106,8 +106,8 @@ golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8T
 golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
 google.golang.org/protobuf v1.27.1/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
-google.golang.org/protobuf v1.35.1 h1:m3LfL6/Ca+fqnjnlqQXNpFPABW1UD7mjh8KO2mKFytA=
-google.golang.org/protobuf v1.35.1/go.mod h1:9fA7Ob0pmnwhb644+1+CVWFRbNajQ6iRojtC/QF5bRE=
+google.golang.org/protobuf v1.35.2 h1:8Ar7bF+apOIoThw1EdZl0p1oWvMqTHmpA2fRTyZO8io=
+google.golang.org/protobuf v1.35.2/go.mod h1:9fA7Ob0pmnwhb644+1+CVWFRbNajQ6iRojtC/QF5bRE=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=