diff --git a/.github/workflows/wheels-dependencies.sh b/.github/workflows/wheels-dependencies.sh
index 581c71253..0bb586b6d 100755
--- a/.github/workflows/wheels-dependencies.sh
+++ b/.github/workflows/wheels-dependencies.sh
@@ -29,7 +29,7 @@ else
     GIFLIB_VERSION=5.2.1
 fi
 if [[ -n "$IS_MACOS" ]] || [[ "$MB_ML_VER" != 2014 ]]; then
-    ZLIB_VERSION=1.3
+    ZLIB_VERSION=1.3.1
 else
     ZLIB_VERSION=1.2.8
 fi
diff --git a/winbuild/build_prepare.py b/winbuild/build_prepare.py
index 99c7228fa..2cfc13dbc 100644
--- a/winbuild/build_prepare.py
+++ b/winbuild/build_prepare.py
@@ -121,7 +121,7 @@ V = {
     "OPENJPEG": "2.5.2",
     "TIFF": "4.6.0",
     "XZ": "5.4.5",
-    "ZLIB": "1.3",
+    "ZLIB": "1.3.1",
 }
 V["LIBPNG_DOTLESS"] = V["LIBPNG"].replace(".", "")
 V["LIBPNG_XY"] = "".join(V["LIBPNG"].split(".")[:2])