diff --git a/artiq-fast/pkgs/python-deps.nix b/artiq-fast/pkgs/python-deps.nix
index 2c1288f..1abcd96 100644
--- a/artiq-fast/pkgs/python-deps.nix
+++ b/artiq-fast/pkgs/python-deps.nix
@@ -71,14 +71,14 @@ rec {
 
   misoc = python3Packages.buildPythonPackage {
     pname = "misoc";
-    version = if misoc-new then "unstable-2021-10-08" else "unstable-2021-02-15";
+    version = if misoc-new then "unstable-2021-10-10" else "unstable-2021-02-15";
 
     src = if misoc-new
       then (fetchFromGitHub {
         owner = "m-labs";
         repo = "misoc";
-        rev = "87f77a739b587a6602b87ee1a94da509d36ba269";
-        sha256 = "sha256-+6tqAX+ek+jUU8m59vhhp4QS9UK+D2a6pLD1aFDIWX8=";
+        rev = "51ea207bfbc03a552071df0bbf770913ba904217";
+        sha256 = "sha256-5dRDFxwKye4X6QQkdNma3SJknPXZDUUyF9GUwgS1Otc=";
         fetchSubmodules = true;
       })
       else (fetchFromGitHub {