diff --git a/pkgs/shells/zsh/oh-my-zsh/default.nix b/pkgs/shells/zsh/oh-my-zsh/default.nix
index 964894045986..d15bd0245731 100644
--- a/pkgs/shells/zsh/oh-my-zsh/default.nix
+++ b/pkgs/shells/zsh/oh-my-zsh/default.nix
@@ -5,15 +5,15 @@
 , git, nix, nixfmt, jq, coreutils, gnused, curl, cacert }:
 
 stdenv.mkDerivation rec {
-  version = "2021-12-16";
+  version = "2021-12-18";
   pname = "oh-my-zsh";
-  rev = "41c15a21599f16a802046f741ac26f80c30c7c31";
+  rev = "904f8685f75ff5dd3f544f8c6f2cabb8e5952e9a";
 
   src = fetchFromGitHub {
     inherit rev;
     owner = "ohmyzsh";
     repo = "ohmyzsh";
-    sha256 = "Qk9raMddNvFx5q/LyWD2f3QakGgbHNcjS7vetteYxNU=";
+    sha256 = "Pos7LaNQllZrzBUx8a7QXi1sAVcIABQJOLUjIwGIP/U=";
   };
 
   installPhase = ''