diff --git a/pkgs/shells/zsh/oh-my-zsh/default.nix b/pkgs/shells/zsh/oh-my-zsh/default.nix
index eea0c818920..7df43f7dab4 100644
--- a/pkgs/shells/zsh/oh-my-zsh/default.nix
+++ b/pkgs/shells/zsh/oh-my-zsh/default.nix
@@ -4,13 +4,13 @@
 { stdenv, fetchgit }:
 
 stdenv.mkDerivation rec {
-  version = "2019-09-13";
+  version = "2019-09-20";
   pname = "oh-my-zsh";
-  rev = "32338fd40cae45c775dadc34ae05476811a3834b";
+  rev = "6cfaa076272e08b6a81b6358b78d020e48f8a4a6";
 
   src = fetchgit { inherit rev;
     url = "https://github.com/robbyrussell/oh-my-zsh";
-    sha256 = "0fp1hzxmml14ds12751icbsm2v3rhwm2vf5qzc65722fvvb98p0p";
+    sha256 = "0i1mlw42g2w5pbg6zsl48pdwv1hy5zrwx9kq4w04mynwg7mc9hs5";
   };
 
   pathsToLink = [ "/share/oh-my-zsh" ];