diff --git a/artiq-fast/pkgs/python-deps.nix b/artiq-fast/pkgs/python-deps.nix
index ca2e50e..822cc1b 100644
--- a/artiq-fast/pkgs/python-deps.nix
+++ b/artiq-fast/pkgs/python-deps.nix
@@ -213,13 +213,13 @@ rec {
 
   migen-axi = python3Packages.buildPythonPackage {
     pname = "migen-axi";
-    version = "unstable-2021-01-22";
+    version = "unstable-2021-08-23";
 
     src = fetchFromGitHub {
       owner = "peteut";
       repo = "migen-axi";
-      rev = "9439ee900358598cecc682db327aa30e506172b5";
-      sha256 = "1z5s8ifq7fbpqi6sx2i87rmz63kbgh9ck94fs2qf21ixhxi46nm3";
+      rev = "1f94ee0fc847dad118020bfc8c6a8f26ed9958bd";
+      sha256 = "0bk4g8k7cng8na01p7h6llrfpjkmxsamyi1kacvk3n110l2kl93g";
     };
 
     nativeBuildInputs = [ python3Packages.pbr ];