diff --git a/pkgs/development/python-modules/mitmproxy/default.nix b/pkgs/development/python-modules/mitmproxy/default.nix
index 1a7c81c87388..2d4e4f5a95d8 100644
--- a/pkgs/development/python-modules/mitmproxy/default.nix
+++ b/pkgs/development/python-modules/mitmproxy/default.nix
@@ -40,14 +40,14 @@
 
 buildPythonPackage rec {
   pname = "mitmproxy";
-  version = "12.2.2";
+  version = "12.2.3";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "mitmproxy";
     repo = "mitmproxy";
     tag = "v${version}";
-    hash = "sha256-WhWXybzBuI7hB54TuqxOmOoHUUIqf0uiC8+KDbvbqgA=";
+    hash = "sha256-YgM8GjWmWKxOZcahR3+9XO2Xyfu9v8rNgxKn/2oL35Y=";
   };
 
   pythonRelaxDeps = [