diff --git a/.github/workflows/wheels-dependencies.sh b/.github/workflows/wheels-dependencies.sh
index f66033b4373..f0ffd87d483 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=3.0.2
 OPENJPEG_VERSION=2.5.2
 XZ_VERSION=5.4.5
diff --git a/winbuild/build_prepare.py b/winbuild/build_prepare.py
index d743adbe584..5e144d598c8 100644
--- a/winbuild/build_prepare.py
+++ b/winbuild/build_prepare.py
@@ -116,7 +116,7 @@ def cmd_msbuild(
     "HARFBUZZ": "8.3.0",
     "JPEGTURBO": "3.0.2",
     "LCMS2": "2.16",
-    "LIBPNG": "1.6.39",
+    "LIBPNG": "1.6.43",
     "LIBWEBP": "1.3.2",
     "OPENJPEG": "2.5.2",
     "TIFF": "4.6.0",