diff --git a/manifest.yml.j2 b/manifest.yml.j2
index 1e4f97425..21d43d458 100644
--- a/manifest.yml.j2
+++ b/manifest.yml.j2
@@ -72,7 +72,7 @@ applications:
 
       # Credentials variables
       ADMIN_BASE_URL: '{{ ADMIN_BASE_URL }}'
-      API_INTERNAL_SECRETS: '{{ API_INTERNAL_SECRETS }}'
+      API_INTERNAL_SECRETS: '{{ API_INTERNAL_SECRETS | tojson }}'
       API_HOST_NAME: '{{ API_HOST_NAME }}'
       DANGEROUS_SALT: '{{ DANGEROUS_SALT }}'
       SECRET_KEY: '{{ SECRET_KEY }}'