diff --git a/scripts/process-issues.py b/scripts/process-issues.py
index 7ee7a5a..3d6a69a 100644
--- a/scripts/process-issues.py
+++ b/scripts/process-issues.py
@@ -12,10 +12,10 @@ def main():
         instance_url = os.environ['INSTANCE_URL'].rstrip('/')
         repository = os.environ['REPOSITORY']
         token = os.environ['TOKEN']
-        stale_days = os.environ.get('STALE_DAYS')
-        stale_tag = os.environ.get('STALE_TAG', 'stale')
-        exclude_tag = os.environ.get('EXCLUDE_TAG')
-        required_tag = os.environ.get('REQUIRED_TAG')
+        stale_days = int(os.environ.get('STALE_DAYS'))
+        stale_tag = int(os.environ.get('STALE_TAG'))
+        exclude_tag = int(os.environ.get('EXCLUDE_TAG'))
+        required_tag = int(os.environ.get('REQUIRED_TAG'))
     except KeyError as e:
         print(f"Error: Missing required environment variable: {e}", file=sys.stderr)
         sys.exit(1)
diff --git a/scripts/process-pull-requests.py b/scripts/process-pull-requests.py
index cb8c6ae..d55a2c6 100644
--- a/scripts/process-pull-requests.py
+++ b/scripts/process-pull-requests.py
@@ -12,10 +12,10 @@ def main():
         instance_url = os.environ['INSTANCE_URL'].rstrip('/')
         repository = os.environ['REPOSITORY']
         token = os.environ['TOKEN']
-        stale_days = os.environ.get('STALE_DAYS')
-        stale_tag = os.environ.get('STALE_TAG', 'stale')
-        exclude_tag = os.environ.get('EXCLUDE_TAG')
-        required_tag = os.environ.get('REQUIRED_TAG')
+        stale_days = int(os.environ.get('STALE_DAYS'))
+        stale_tag = int(os.environ.get('STALE_TAG'))
+        exclude_tag = int(os.environ.get('EXCLUDE_TAG'))
+        required_tag = int(os.environ.get('REQUIRED_TAG'))
     except KeyError as e:
         print(f"Error: Missing required environment variable: {e}", file=sys.stderr)
         sys.exit(1)
@@ -40,7 +40,6 @@ def main():
         enable_stale_tag= False
         print(f">> No value for stale days.")
     else:
-        stale_days = int(stale_days)
         older_than_date = datetime.now(timezone.utc) - timedelta(days=stale_days)
         enable_stale_tag = True
 
@@ -105,11 +104,11 @@ def main():
                     continue
 
                 print(f">> Will tag PR #{pr_number} with '{stale_tag}'")
-                update_labels = list(update_labels | {stale_tag})
+                update_labels.add(stale_tag)
 
 
         # --- Make update with new labels ---
-        update_payload = {'labels': update_labels}
+        update_payload = {'labels': list(update_labels)}
         update_url = f"{base_api_url}/{pr_number}/labels"
 
         print(f">> Updating PR #{pr_number} ...")