diff --git a/lora-trigger-sheet b/lora-trigger-sheet
index 29a2839..b349453 100755
--- a/lora-trigger-sheet
+++ b/lora-trigger-sheet
@@ -18,6 +18,7 @@ from pathlib import Path
 import hashlib
 import time
 from urllib.error import HTTPError, URLError
+from urllib.parse import quote
 from urllib.request import urlopen, Request
 
 
@@ -177,8 +178,9 @@ def lookup_source(filepath, filename, cache):
     if cached:
         url = cached.get("url")
         label = cached.get("label")
-        if url and (now - cached.get("last_checked", 0)) < 86400 * 30:
-            return url, label
+        last = cached.get("last_checked", 0)
+        if (now - last) < 86400 * 30:
+            return (url, label) if url else (None, None)
 
     # CivitAI model-version lookup by BLAKE2b file hash
     try:
@@ -211,7 +213,7 @@ def lookup_source(filepath, filename, cache):
         )
         data = _fetch_json(
             "https://huggingface.co/api/models"
-            f"?search={q}&sort=downloads&direction=-1&limit=3"
+            f"?search={quote(q)}&sort=downloads&direction=-1&limit=3"
         )
         if isinstance(data, list) and len(data) > 0:
             model_id = data[0].get("modelId", "")