diff --git a/config.sh b/config.sh
index c3106c8b9..aa9868cd4 100644
--- a/config.sh
+++ b/config.sh
@@ -5,7 +5,7 @@ ARCHIVE_SDIR=pillow-depends-master
 
 # Package versions for fresh source builds
 FREETYPE_VERSION=2.9.1
-LIBPNG_VERSION=1.6.35
+LIBPNG_VERSION=1.6.36
 ZLIB_VERSION=1.2.11
 JPEG_VERSION=9c
 OPENJPEG_VERSION=2.1