diff --git a/artiq-fast/pkgs/python-deps.nix b/artiq-fast/pkgs/python-deps.nix
index ea7da06..f53440a 100644
--- a/artiq-fast/pkgs/python-deps.nix
+++ b/artiq-fast/pkgs/python-deps.nix
@@ -77,8 +77,8 @@ rec {
       then (fetchFromGitHub {
         owner = "m-labs";
         repo = "misoc";
-        rev = "2acffae0ee51e569dc217a9f3cea06b33103d623";
-        sha256 = "sha256-/x9CPW0mnUR6hgHWzOSJY//P9k9w+gObNn2uwrxL8dw=";
+        rev = "855914deace34880c69589022c52a8921f431063";
+        sha256 = "sha256-CbeXsLTwwYBWb5cfrVVYkcQYV207gi9+CQhzfeZbXGc=";
         fetchSubmodules = true;
       })
       else (fetchFromGitHub {