diff --git a/.github/scripts/write_repo_contents.py b/.github/scripts/write_repo_contents.py
index a6b97c1..94adc9a 100644
--- a/.github/scripts/write_repo_contents.py
+++ b/.github/scripts/write_repo_contents.py
@@ -73,6 +73,9 @@
 if data["software"]["keywords"]:
     keywords += data["software"]["keywords"]
 
+#ensure keywords have valid format
+keywords = [item[:50].lower() for item in keywords]
+
 model_repo.replace_topics(keywords)