diff --git a/modules/default.nix b/modules/default.nix
index ecc5588..d8b08d3 100644
--- a/modules/default.nix
+++ b/modules/default.nix
@@ -7,7 +7,7 @@ package:
 
 {
   options.services.lego-monitoring = {
-    enable = lib.mkEnableOption "lego-monitoring service."
+    enable = lib.mkEnableOption "lego-monitoring service.";
   };
 
   config = {};