diff --git a/pkgs/development/python-modules/gym/default.nix b/pkgs/development/python-modules/gym/default.nix
index c8ad9107004..61b74ad6928 100644
--- a/pkgs/development/python-modules/gym/default.nix
+++ b/pkgs/development/python-modules/gym/default.nix
@@ -20,7 +20,7 @@ buildPythonPackage rec {
   doCheck = false;
 
   meta = with lib; {
-    description = "A toolkit by OpenAI for developing and comparing your reinforcement learning agents.";
+    description = "A toolkit by OpenAI for developing and comparing your reinforcement learning agents";
     homepage = https://gym.openai.com/;
     license = licenses.mit;
     maintainers = with maintainers; [ hyphon81 ];