diff --git a/vendor/zlib/libz.lib b/vendor/zlib/libz.lib
index 1cc2943ce08..2e31c78495f 100644
Binary files a/vendor/zlib/libz.lib and b/vendor/zlib/libz.lib differ
diff --git a/vendor/zlib/zlib.odin b/vendor/zlib/zlib.odin
index 021449813a3..05c251f9e7d 100644
--- a/vendor/zlib/zlib.odin
+++ b/vendor/zlib/zlib.odin
@@ -10,11 +10,11 @@ when ODIN_OS == .Windows {
 	foreign import zlib "system:z"
 }
 
-VERSION         :: "1.2.12"
-VERNUM          :: 0x12c0
+VERSION         :: "1.3.1"
+VERNUM          :: 0x1310
 VER_MAJOR       :: 1
-VER_MINOR       :: 2
-VER_REVISION    :: 12
+VER_MINOR       :: 3
+VER_REVISION    :: 1
 VER_SUBREVISION :: 0
 
 voidp           :: rawptr
@@ -221,7 +221,7 @@ foreign zlib {
 @(default_calling_convention="c")
 foreign zlib {
 	deflateInit_         :: proc(strm: z_streamp, level: c.int, version: cstring, stream_size: c.int) -> c.int ---
-	inflateInit_         :: proc(strm: z_streamp, level: c.int, version: cstring, stream_size: c.int) -> c.int ---
+	inflateInit_         :: proc(strm: z_streamp, version: cstring, stream_size: c.int) -> c.int ---
 	deflateInit2_        :: proc(strm: z_streamp, level, method, windowBits, memLevel, strategy: c.int, version: cstring, stream_size: c.int) -> c.int ---
 	inflateInit2_        :: proc(strm: z_streamp, windowBits: c.int, version: cstring, stream_size: c.int) -> c.int ---
 	inflateBackInit_     :: proc(strm: z_streamp, windowBits: c.int, window: [^]c.uchar, version: cstring, stream_size: c.int) -> c.int ---
@@ -235,8 +235,8 @@ deflateInit :: #force_inline proc "c" (strm: z_streamp, level: c.int) -> c.int {
 	return deflateInit_(strm, level, VERSION, c.int(size_of(z_stream)))
 }
 
-inflateInit :: #force_inline proc "c" (strm: z_streamp, level: c.int) -> c.int {
-	return inflateInit_(strm, level, VERSION, c.int(size_of(z_stream)))
+inflateInit :: #force_inline proc "c" (strm: z_streamp) -> c.int {
+	return inflateInit_(strm, VERSION, c.int(size_of(z_stream)))
 }
 
 deflateInit2 :: #force_inline proc "c" (strm: z_streamp, level, method, windowBits, memLevel, strategy: c.int) -> c.int {