diff --git a/CMakeLists.txt b/CMakeLists.txt
index 87623d2..e802d8b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -36,7 +36,7 @@ DLEXT (http://www.zlib.net/zlib-1.2.11.tar.gz zlib.tar.gz)
 DLEXT (https://github.com/vietjtnguyen/argagg/archive/0.4.6.tar.gz argagg.tar.gz)
 DLEXT (https://curl.haxx.se/download/curl-7.55.0.tar.xz curl.tar.xz)
 DLEXT (http://mirror.switch.ch/ftp/mirror/gnu/gettext/gettext-0.19.8.1.tar.xz gettext.tar.xz)
-DLEXT (http://prdownloads.sourceforge.net/libpng/libpng-1.6.28.tar.xz libpng.tar.xz)
+DLEXT (ftp://ftp-osl.osuosl.org/pub/libpng/src/libpng16/libpng-1.6.34.tar.xz libpng.tar.xz)
 DLEXT (http://www.ffmpeg.org/releases/ffmpeg-3.4.1.tar.xz ffmpeg.tar.xz)
 DLEXT (http://downloads.xiph.org/releases/ogg/libogg-1.3.3.tar.xz libogg.tar.xz)
 DLEXT (http://downloads.xiph.org/releases/vorbis/libvorbis-1.3.5.tar.xz libvorbis.tar.xz)