diff --git a/extern/zlib/Readme.txt b/extern/zlib/Readme.txt
index 16f388c16e..6ba7036a7a 100644
--- a/extern/zlib/Readme.txt
+++ b/extern/zlib/Readme.txt
@@ -4,7 +4,7 @@ architectures.
 
 The source code of zlib library was downloaded from 
 
-  http://zlib.net/zlib1211.zip
+  http://zlib.net/zlib1212.zip
 
 It was built with MSVC17 compilers using commands specified at win32/Makefile.msc:
 
diff --git a/extern/zlib/zlib.exe b/extern/zlib/zlib.exe
index cfe5367e63..d0d734e26e 100644
Binary files a/extern/zlib/zlib.exe and b/extern/zlib/zlib.exe differ