diff --git a/pkgs/development/python-modules/gast/default.nix b/pkgs/development/python-modules/gast/default.nix
index 6d18a7ba6d11..4b4aa8c0bd34 100644
--- a/pkgs/development/python-modules/gast/default.nix
+++ b/pkgs/development/python-modules/gast/default.nix
@@ -7,22 +7,13 @@
 
 buildPythonPackage rec {
   pname = "gast";
-  version = "0.5.0";
-
-  # TODO: remove this patch on the next release, this fixes a bug with parsing
-  # assignment expressions e.g., `x := 1`.
-  patches = [
-    (fetchpatch {
-      url = "https://github.com/serge-sans-paille/gast/commit/3cc9b4d05a80e4bb42882de00df314aaa1e6e591.patch";
-      sha256 = "0ylpn0x0a4y6139vd048blsh77yd08npjcn4b5ydf89xnji5mlm1";
-    })
-  ];
+  version = "0.5.1";
 
   src = fetchFromGitHub {
     owner = "serge-sans-paille";
     repo = "gast";
     rev = version;
-    sha256 = "0qsg36knv0k2ppzbr5m4w6spxxw7a77lw88y8vjx7m176bajnsbw";
+    sha256 = "1gph45frnj47lfr6idiyxrb3gk7vzc9rni9cijmcyz10dyx5kgwa";
   };
 
   checkInputs = [ astunparse ];