diff --git a/apps/predbat/predbat.py b/apps/predbat/predbat.py
index 306da5a32..cb8922e4a 100644
--- a/apps/predbat/predbat.py
+++ b/apps/predbat/predbat.py
@@ -35,7 +35,7 @@
 import pytz
 import asyncio
 
-THIS_VERSION = "v8.40.15"
+THIS_VERSION = "v8.40.16"
 
 from download import predbat_update_move, predbat_update_download, check_install, DEFAULT_PREDBAT_REPOSITORY
 from const import MINUTE_WATT
diff --git a/apps/predbat/web.py b/apps/predbat/web.py
index 411e29209..b5578e57b 100644
--- a/apps/predbat/web.py
+++ b/apps/predbat/web.py
@@ -3380,7 +3380,7 @@ async def html_apps(self, request):
         for arg in args:
             value = args[arg]
             raw_value = self.resolve_value_raw(arg, value)
-            if ("_key" in arg) or ("_password" in arg) or ("_secret" in arg) or ("_pem" in arg):
+            if isinstance(arg, str) and (("_key" in arg) or ("_password" in arg) or ("_secret" in arg) or ("_pem" in arg)):
                 value = '<span title = "{}"> (hidden)</span>'.format(value)
             arg_errors = self.base.arg_errors.get(arg, "")