diff --git a/bin/app-json.py b/bin/app-json.py
index 32bc853..ee50fce 100755
--- a/bin/app-json.py
+++ b/bin/app-json.py
@@ -13,7 +13,7 @@ from os.path import basename, exists, expanduser
 from pathlib import Path
 from re import findall, search
 from shlex import split
-from subprocess import check_output, DEVNULL
+from subprocess import DEVNULL, check_output
 from sys import exit
 
 from requests import get
@@ -200,7 +200,7 @@ def get_app_versions(app_path, cached_apps_json):
             if service in ("null", "---"):
                 continue
 
-            if tag in existing_tags:
+            if tag in existing_tags and service in cached_apps_json[app_name]["versions"][tag]:
                 log.info(f"Skipping {tag} because we've already processed it")
                 existing_versions = cached_apps_json[app_name]["versions"][tag][service]
                 service_versions[service] = existing_versions