diff --git a/README.md b/README.md
index e378f31d..f536e24c 100644
--- a/README.md
+++ b/README.md
@@ -575,14 +575,14 @@ The MacPorts package manager is available to provide these external packages.  O
     # port install vde2
     # port install libsdl2
     # port install libsdl2_ttf
+    # port install libpng
+    # port install zlib
 
 OR
 
 The HomeBrew package manager can be used to provide these packages:
 
-    $ brew install vde
-    $ brew install sdl2
-    $ brew install sdl2_ttf
+    $ brew install vde sdl2 sdl2_ttf libpng zlib
 
 ###### Linux - Dependencies