diff --git a/scripts/webp_conversion/check_images_in_pr.py b/scripts/webp_conversion/check_images_in_pr.py
index 4a163cbdc1..071ca2e00c 100644
--- a/scripts/webp_conversion/check_images_in_pr.py
+++ b/scripts/webp_conversion/check_images_in_pr.py
@@ -62,9 +62,12 @@ def is_url(image_ref):
     # Check for references in text files
     elif filename.lower().endswith(TEXT_EXTENSIONS) and status in ('added', 'modified'):
         try:
-            # Fetch the file content from the PR's head SHA
             contents = repo.get_contents(filename, ref=pr.head.sha)
-            file_content = contents.decoded_content.decode('utf-8', errors='ignore')
+            if contents.encoding == "base64":
+                file_content = contents.decoded_content.decode('utf-8', errors='ignore')
+            else:
+                print(f"Warning: Unsupported encoding '{contents.encoding}' for {filename}. Skipping.", file=sys.stderr)
+                continue
         except GithubException as e:
             print(f"Warning: Could not fetch content for {filename}. Skipping. Error: {e}", file=sys.stderr)
             continue