diff --git a/archives/libpng-1.6.20.tar.gz b/archives/libpng-1.6.20.tar.gz
deleted file mode 100644
index 0b5df1201..000000000
Binary files a/archives/libpng-1.6.20.tar.gz and /dev/null differ
diff --git a/archives/libpng-1.6.21.tar.gz b/archives/libpng-1.6.21.tar.gz
new file mode 100644
index 000000000..1604e875b
Binary files /dev/null and b/archives/libpng-1.6.21.tar.gz differ
diff --git a/run_install.sh b/run_install.sh
index 5a8faf48b..94095ed2c 100644
--- a/run_install.sh
+++ b/run_install.sh
@@ -3,7 +3,7 @@ source terryfy/library_installers.sh
 
 # Package versions for fresh source builds
 FT_VERSION=2.6.2
-PNG_VERSION=1.6.20
+PNG_VERSION=1.6.21
 ZLIB_VERSION=1.2.8
 JPEG_VERSION=9a
 OPENJPEG_VERSION=2.1.0