diff --git a/pkgs/pixman.yaml b/pkgs/pixman.yaml
index 412c7cec6..b34dc2384 100644
--- a/pkgs/pixman.yaml
+++ b/pkgs/pixman.yaml
@@ -1,7 +1,7 @@
 extends: [autotools_package]
 
 dependencies:
-  build: [pkg-config, png]
+  build: [pkg-config, png, zlib]
   run: [pkg-config]
 
 defaults:
diff --git a/pkgs/png.yaml b/pkgs/png.yaml
index 8760164de..86b3a3af6 100644
--- a/pkgs/png.yaml
+++ b/pkgs/png.yaml
@@ -4,8 +4,8 @@ dependencies:
   run: [zlib]
 
 sources:
-- url: http://sourceforge.net/projects/libpng/files/libpng16/older-releases/1.6.6/libpng-1.6.6.tar.gz
-  key: tar.gz:dj4va2fjpzsuvcl3usxe76jiywh6phjz
+- key: tar.gz:43flhdyfdp6gneu6ozwb4z7lu35pvspa
+  url: http://sourceforge.net/projects/libpng/files/libpng16/older-releases/1.6.14/libpng-1.6.14.tar.gz
 
 when_build_dependency:
   - prepend_path: PKG_CONFIG_PATH
diff --git a/pkgs/zlib/zlib.yaml b/pkgs/zlib/zlib.yaml
index 7921ddb5a..38c2d1cc4 100644
--- a/pkgs/zlib/zlib.yaml
+++ b/pkgs/zlib/zlib.yaml
@@ -1,8 +1,9 @@
 extends: [autotools_package]
 
 sources:
-- url: http://downloads.sourceforge.net/project/libpng/zlib/1.2.7/zlib-1.2.7.tar.bz2
-  key: tar.bz2:jhroszmn7mbwsag2n2qcm6ttp6r4j3xg
+- key: tar.gz:gzsyzn3iuvgb2tpmipbrc3bh5wet5cfq
+  url: http://downloads.sourceforge.net/project/libpng/zlib/1.2.8/zlib-1.2.8.tar.gz
+
 
 build_stages: