diff --git a/pkgs/development/python-modules/python-keycloak/default.nix b/pkgs/development/python-modules/python-keycloak/default.nix
index ea96e00abeaf..f3d105c6bad8 100644
--- a/pkgs/development/python-modules/python-keycloak/default.nix
+++ b/pkgs/development/python-modules/python-keycloak/default.nix
@@ -25,7 +25,8 @@ buildPythonPackage rec {
 
   postPatch = ''
     substituteInPlace pyproject.toml \
-      --replace 'version = "0.0.0"' 'version = "${version}"'
+      --replace 'version = "0.0.0"' 'version = "${version}"' \
+      --replace 'requests-toolbelt = "^0.9.1"' 'requests-toolbelt = "*"'
   '';
 
   buildInputs = [