diff --git a/_static/drag_drop.css b/_static/drag_drop.css
index 1c6ff85..bed38fc 100644
--- a/_static/drag_drop.css
+++ b/_static/drag_drop.css
@@ -154,7 +154,7 @@ html[data-theme='dark'] .reset-button {
 
 .reset-button:hover {
     background: #00305e;
-    color: white;
+    color: white !important;
 }
 
 .feedback {
diff --git a/quadriga/metadata/create_zenodo_json.py b/quadriga/metadata/create_zenodo_json.py
index 3360a01..6cf96cb 100644
--- a/quadriga/metadata/create_zenodo_json.py
+++ b/quadriga/metadata/create_zenodo_json.py
@@ -183,7 +183,7 @@ def create_zenodo_json() -> bool | None:
             logger.error("No authors found in metadata.yml")
             return False
 
-        # description
+        # description - must exist in metadata or schema checks block it
         description = "<p>" + metadata.get("description") + "</p>"
 
         description_base = f"""
diff --git a/quadriga/metadata/utils.py b/quadriga/metadata/utils.py
index 36f3b38..5f0913e 100644
--- a/quadriga/metadata/utils.py
+++ b/quadriga/metadata/utils.py
@@ -552,15 +552,15 @@ def get_content_license(metadata: dict) -> str | None:
     """
     license_data = metadata.get("license")
     if isinstance(license_data, str):
-        return license_data
+        return license_data.replace(" ", "-")
     if isinstance(license_data, dict) and "content" in license_data:
         content = license_data["content"]
         if isinstance(content, str):
-            return content
+            return content.replace(" ", "-")
         if isinstance(content, dict) and "name" in content:
-            return str(content["name"])
+            return str(content["name"]).replace(" ", "-")
         if isinstance(content, list) and content:
-            return str(content[0])
+            return str(content[0]).replace(" ", "-")
     return None