diff --git a/pkgs/development/python-modules/diff-cover/default.nix b/pkgs/development/python-modules/diff-cover/default.nix
index b198097ebdb0..9ca63fd2b533 100644
--- a/pkgs/development/python-modules/diff-cover/default.nix
+++ b/pkgs/development/python-modules/diff-cover/default.nix
@@ -19,7 +19,7 @@
 
 buildPythonPackage rec {
   pname = "diff-cover";
-  version = "8.0.3";
+  version = "9.0.0";
   format = "pyproject";
 
   disabled = pythonOlder "3.7";
@@ -27,7 +27,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     pname = "diff_cover";
     inherit version;
-    hash = "sha256-OTVlyoZorh4OOOThMrUc8CgIb7Bqen2Ued61Aj4vaNQ=";
+    hash = "sha256-HchR0/PzIMBI0DYY5MDZhh+koVBrQl0tCaVksgyVZ0o=";
   };
 
   nativeBuildInputs = [