diff --git a/libpng/.gitignore b/libpng/.gitignore
index 119e6971..88e7bdac 100644
--- a/libpng/.gitignore
+++ b/libpng/.gitignore
@@ -1,4 +1,4 @@
-libpng-1.6.40
+libpng-1.6.50
 libpng-linux-32
 libpng-linux-64
 libpng-win-32
diff --git a/libpng/build_libpng_deps b/libpng/build_libpng_deps
index d796eabd..7b969ee1 100755
--- a/libpng/build_libpng_deps
+++ b/libpng/build_libpng_deps
@@ -17,7 +17,7 @@
 
 source ../build_dep.common
 
-LIBPNG="libpng-1.6.40.tar.bz2"
+LIBPNG="libpng-1.6.50.tar.bz2"
 
 case `uname` in
 	Linux)
diff --git a/libpng/libpng-1.6.40.tar.bz2 b/libpng/libpng-1.6.40.tar.bz2
deleted file mode 100644
index 82f70bd1..00000000
Binary files a/libpng/libpng-1.6.40.tar.bz2 and /dev/null differ
diff --git a/libpng/libpng-1.6.50.tar.bz2 b/libpng/libpng-1.6.50.tar.bz2
new file mode 100644
index 00000000..6c39f531
Binary files /dev/null and b/libpng/libpng-1.6.50.tar.bz2 differ
diff --git a/zlib-1.3.1.tar.bz2 b/zlib-1.3.1.tar.bz2
new file mode 100644
index 00000000..cbf838cd
Binary files /dev/null and b/zlib-1.3.1.tar.bz2 differ
diff --git a/zlib/.gitignore b/zlib/.gitignore
index be216502..2f460aef 100644
--- a/zlib/.gitignore
+++ b/zlib/.gitignore
@@ -1,4 +1,4 @@
-zlib-1.3
+zlib-1.3.1
 zlib-linux-32
 zlib-linux-64
 zlib-win-32
diff --git a/zlib/build_zlib_deps b/zlib/build_zlib_deps
index cd92db19..67917afe 100755
--- a/zlib/build_zlib_deps
+++ b/zlib/build_zlib_deps
@@ -17,7 +17,7 @@
 
 source ../build_dep.common
 
-ZLIB="zlib-1.3.tar.gz"
+ZLIB="zlib-1.3.1.tar.gz"
 
 case `uname` in
 	Linux)
diff --git a/zlib/zlib-1.3.1.tar.gz b/zlib/zlib-1.3.1.tar.gz
new file mode 100644
index 00000000..53fa48bf
Binary files /dev/null and b/zlib/zlib-1.3.1.tar.gz differ
diff --git a/zlib/zlib-1.3.tar.gz b/zlib/zlib-1.3.tar.gz
deleted file mode 100644
index 88faf0fc..00000000
Binary files a/zlib/zlib-1.3.tar.gz and /dev/null differ