diff --git a/pkgs/development/python-modules/pythran/default.nix b/pkgs/development/python-modules/pythran/default.nix
index a20b4ecf5373..b8c65d3151f1 100644
--- a/pkgs/development/python-modules/pythran/default.nix
+++ b/pkgs/development/python-modules/pythran/default.nix
@@ -24,14 +24,14 @@ let
 in
 buildPythonPackage rec {
   pname = "pythran";
-  version = "0.18.0";
+  version = "0.18.1";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "serge-sans-paille";
     repo = "pythran";
     tag = version;
-    hash = "sha256-GZSVcB4JIx02eiUb9d7o5cUAyICIoH6m0mz4TL7a9PY=";
+    hash = "sha256-H13FGApWCgBLWOtoZ5yEIV4Z+KAOK3Xs4KFM4oLmKmk=";
   };
 
   patches = [
@@ -59,6 +59,11 @@ buildPythonPackage rec {
     setuptools
   ];
 
+  pythonRelaxDeps = [
+    "gast"
+    "beniget"
+  ];
+
   pythonImportsCheck = [
     "pythran"
     "pythran.backend"
@@ -72,7 +77,7 @@ buildPythonPackage rec {
   doCheck = false;
 
   meta = {
-    changelog = "https://github.com/serge-sans-paille/pythran/blob/${src.rev}/Changelog";
+    changelog = "https://github.com/serge-sans-paille/pythran/blob/${src.tag}/Changelog";
     description = "Ahead of Time compiler for numeric kernels";
     homepage = "https://github.com/serge-sans-paille/pythran";
     license = lib.licenses.bsd3;