diff --git a/eda/nmigen.nix b/eda/nmigen.nix
index abe311e..f3ce536 100644
--- a/eda/nmigen.nix
+++ b/eda/nmigen.nix
@@ -6,8 +6,8 @@ python3Packages.buildPythonPackage {
   src = fetchFromGitHub {
     owner = "m-labs";
     repo = "nmigen";
-    rev = "b45c5119f573e156a3aad4a362ca210d6e40505e";
-    sha256 = "1qyh6h8amqz9z6l2h0rj4lzpkm1i2fgbxn5m0p6igwflqk0svffz";
+    rev = "ad1a40c934cc33374109069296386d66023671f1";
+    sha256 = "0r1agrx7z38yzsi6cnxrdv3isbcsvmpkcp0lfxg426l9r52xg4r5";
   };
 
   checkPhase = "PATH=${yosys}/bin:${symbiyosys}/bin:${yices}/bin:$PATH python -m unittest discover nmigen.test -v";