diff --git a/config.sh b/config.sh
index 83ab6fb5c..11c5495b6 100644
--- a/config.sh
+++ b/config.sh
@@ -6,7 +6,7 @@ ARCHIVE_SDIR=pillow-depends-main
 # Package versions for fresh source builds
 FREETYPE_VERSION=2.12.1
 HARFBUZZ_VERSION=5.3.1
-LIBPNG_VERSION=1.6.38
+LIBPNG_VERSION=1.6.39
 JPEGTURBO_VERSION=2.1.4
 OPENJPEG_VERSION=2.5.0
 XZ_VERSION=5.2.8