diff --git a/templates/puppetdb/routes.yaml.erb b/templates/puppetdb/routes.yaml.erb
index 00b4c37..55b4154 100644
--- a/templates/puppetdb/routes.yaml.erb
+++ b/templates/puppetdb/routes.yaml.erb
@@ -2,4 +2,4 @@
 master:
   facts:
     terminus: puppetdb
-    cache: yaml
+    cache: json