diff --git a/.github/workflows/wheels-dependencies.sh b/.github/workflows/wheels-dependencies.sh
index 26bf2f6d655..01f8ca9d46e 100755
--- a/.github/workflows/wheels-dependencies.sh
+++ b/.github/workflows/wheels-dependencies.sh
@@ -17,7 +17,7 @@ ARCHIVE_SDIR=pillow-depends-main
 # Package versions for fresh source builds
 FREETYPE_VERSION=2.13.2
 HARFBUZZ_VERSION=8.3.0
-LIBPNG_VERSION=1.6.40
+LIBPNG_VERSION=1.6.43
 JPEGTURBO_VERSION=3.0.1
 OPENJPEG_VERSION=2.5.0
 XZ_VERSION=5.4.5
diff --git a/winbuild/build_prepare.py b/winbuild/build_prepare.py
index df33ea493e6..91d4ca16ab0 100644
--- a/winbuild/build_prepare.py
+++ b/winbuild/build_prepare.py
@@ -224,9 +224,9 @@ def cmd_msbuild(
         "libs": [r"libtiff\*.lib"],
     },
     "libpng": {
-        "url": SF_PROJECTS + "/libpng/files/libpng16/1.6.39/lpng1639.zip/download",
-        "filename": "lpng1639.zip",
-        "dir": "lpng1639",
+        "url": SF_PROJECTS + "/libpng/files/libpng16/1.6.43/lpng1643.zip/download",
+        "filename": "lpng1643.zip",
+        "dir": "lpng1643",
         "license": "LICENSE",
         "build": [
             *cmds_cmake("png_static", "-DPNG_SHARED:BOOL=OFF", "-DPNG_TESTS:BOOL=OFF"),