diff --git a/pkgs/development/python-modules/frelatage/default.nix b/pkgs/development/python-modules/frelatage/default.nix
index f3acdf33516b..be04e82e7aa6 100644
--- a/pkgs/development/python-modules/frelatage/default.nix
+++ b/pkgs/development/python-modules/frelatage/default.nix
@@ -23,6 +23,8 @@ buildPythonPackage rec {
     hash = "sha256-eHVqp6govBV9FvSQyaZuEEImHQRs/mbLaW86RCvtDbM=";
   };
 
+  pythonRelaxDeps = [ "numpy" ];
+
   build-system = [ poetry-core ];
 
   dependencies = [