diff --git a/setage.py b/setage.py
index a76583f..74cd9c1 100755
--- a/setage.py
+++ b/setage.py
@@ -467,7 +467,7 @@ if __name__ == "__main__":
         print(
             f"Sorry, this is only usable with python 3.11 as of {__version__}")
         exit(1)
-    print("WARNING: It's a prototype. Beware of bugs. Report them")
+    print("WARNING: It's a prototype. Beware of bugs. Report them.")
     parser = ArgumentParser(
         description="SETAGE, the Simple Extensible Text Adventure Game Engine")
     parser.add_argument("file", nargs="?", default="manifest.setage",