diff --git a/src/zippy/internal.nim b/src/zippy/internal.nim
index 8515434..8673503 100644
--- a/src/zippy/internal.nim
+++ b/src/zippy/internal.nim
@@ -110,16 +110,16 @@ const
     16.uint8, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15
   ]
 
-  S_IFDIR* = 0o0040000
-  TUREAD* = 0o00400 # read by owner */
-  TUWRITE* = 0o00200 # write by owner */
-  TUEXEC* = 0o00100 # execute/search by owner */
-  TGREAD* = 0o00040 # read by group */
-  TGWRITE* = 0o00020 # write by group */
-  TGEXEC* = 0o00010 # execute/search by group */
-  TOREAD* = 0o00004 # read by other */
-  TOWRITE* = 0o00002 # write by other */
-  TOEXEC* = 0o00001 # execute/search by other */
+  S_IFDIR* = 0o0040000'u32
+  TUREAD* = 0o00400'u32 # read by owner */
+  TUWRITE* = 0o00200'u32 # write by owner */
+  TUEXEC* = 0o00100'u32 # execute/search by owner */
+  TGREAD* = 0o00040'u32 # read by group */
+  TGWRITE* = 0o00020'u32 # write by group */
+  TGEXEC* = 0o00010'u32 # execute/search by group */
+  TOREAD* = 0o00004'u32 # read by other */
+  TOWRITE* = 0o00002'u32 # write by other */
+  TOEXEC* = 0o00001'u32 # execute/search by other */
 
 type
   CompressionConfig* = object
@@ -272,7 +272,7 @@ proc determineMatchLength*(
 proc toUnixPath*(path: string): string =
   path.replace('\\', '/')
 
-proc parseFilePermissions*(permissions: int): set[FilePermission] =
+proc parseFilePermissions*(permissions: uint32): set[FilePermission] =
   if defined(windows) or permissions == 0:
     # Ignore file permissions on Windows. If they are absent (.zip made on
     # Windows for example), set default permissions.
diff --git a/src/zippy/tarballs.nim b/src/zippy/tarballs.nim
index 29e96dc..28ae1d2 100644
--- a/src/zippy/tarballs.nim
+++ b/src/zippy/tarballs.nim
@@ -102,7 +102,10 @@ proc extractAll*(
             dest / path,
             uncompressed.toOpenArray(pos, max(pos + size - 1, 0))
           )
-          setFilePermissions(dest / path, parseFilePermissions(mode))
+          setFilePermissions(
+            dest / path,
+            parseFilePermissions(cast[uint32](mode))
+          )
           lastModifiedTimes.add (path, initTime(mtime, 0))
         elif typeflag == '5': # Directories
           createDir(dest / path)
diff --git a/src/zippy/tarballs_v1.nim b/src/zippy/tarballs_v1.nim
index 7e24c01..3bda7ec 100644
--- a/src/zippy/tarballs_v1.nim
+++ b/src/zippy/tarballs_v1.nim
@@ -145,7 +145,7 @@ proc openStreamImpl(
           kind: ekNormalFile,
           contents: data[pos ..< pos + fileSize],
           lastModified: initTime(lastModified, 0),
-          permissions: parseFilePermissions(fileMode),
+          permissions: parseFilePermissions(cast[uint32](fileMode)),
         )
     elif typeFlag == '5':
       tarball.contents[(fileNamePrefix / fileName).toUnixPath()] =
diff --git a/src/zippy/ziparchives.nim b/src/zippy/ziparchives.nim
index ce31394..ccc58a9 100644
--- a/src/zippy/ziparchives.nim
+++ b/src/zippy/ziparchives.nim
@@ -383,7 +383,7 @@ proc openZipArchive*(
         compressedSize: compressedSize,
         uncompressedSize: uncompressedSize,
         uncompressedCrc32: uncompressedCrc32,
-        filePermissions: parseFilePermissions((externalFileAttr.uint shr 16).int)
+        filePermissions: parseFilePermissions(externalFileAttr shr 16)
       )
   except IOError as e:
     result.close()
diff --git a/zippy.nimble b/zippy.nimble
index 0e19813..e89e455 100644
--- a/zippy.nimble
+++ b/zippy.nimble
@@ -1,4 +1,4 @@
-version       = "0.10.15"
+version       = "0.10.16"
 author        = "Ryan Oldenburg"
 description   = "Pure Nim implementation of deflate, zlib, gzip and zip."
 license       = "MIT"