diff --git a/vecorel_cli/create_stac.py b/vecorel_cli/create_stac.py
index fbc4df7..017b02a 100644
--- a/vecorel_cli/create_stac.py
+++ b/vecorel_cli/create_stac.py
@@ -179,7 +179,7 @@ def create(
             stac["assets"]["data"]["type"] = media_type
 
         # Add license handling
-        license = collection.get("license", "").strip()
+        license = (collection.get("license") or "").strip()
         if license.lower() == "dl-de/by-2-0":
             stac["links"].append(
                 {