diff --git a/src/app.py b/src/app.py
index 6a7e49e04..7fc74a4cb 100644
--- a/src/app.py
+++ b/src/app.py
@@ -2233,7 +2233,7 @@ def _hydrate_app_template(template, data):
         varname = stuff.strip("_").lower()
 
         if varname in data:
-            template = template.replace(stuff, data[varname])
+            template = template.replace(stuff, str(data[varname]))
 
     return template