diff --git a/pkgs/development/python-modules/sanic-testing/default.nix b/pkgs/development/python-modules/sanic-testing/default.nix
index 173e2b91ff79..398f3dad6322 100644
--- a/pkgs/development/python-modules/sanic-testing/default.nix
+++ b/pkgs/development/python-modules/sanic-testing/default.nix
@@ -23,6 +23,10 @@ buildPythonPackage rec {
     "testsout"
   ];
 
+  postPatch = ''
+    sed -i 's/httpx>=.*"/httpx"/' setup.py
+  '';
+
   propagatedBuildInputs = [
     httpx
     sanic