diff --git a/pkgs/development/python-modules/mitmproxy/default.nix b/pkgs/development/python-modules/mitmproxy/default.nix
index 32515800195f..0a6864daea63 100644
--- a/pkgs/development/python-modules/mitmproxy/default.nix
+++ b/pkgs/development/python-modules/mitmproxy/default.nix
@@ -46,7 +46,7 @@
 
 buildPythonPackage rec {
   pname = "mitmproxy";
-  version = "10.3.0";
+  version = "10.3.1";
   pyproject = true;
 
   disabled = pythonOlder "3.9";
@@ -54,8 +54,8 @@ buildPythonPackage rec {
   src = fetchFromGitHub {
     owner = "mitmproxy";
     repo = "mitmproxy";
-    rev = "refs/tags/${version}";
-    hash = "sha256-YjvGsnpQQ8GWLyKmnd3lOxesnr+F2xCNXyahZh0JQnc=";
+    rev = "refs/tags/v${version}";
+    hash = "sha256-rIyRY1FolbdoaI4OgFG7D2/mot8NiRHalgittPzledw=";
   };
 
   nativeBuildInputs = [ pythonRelaxDepsHook ];