diff --git a/templates/group_created.json.j2 b/templates/group_created.json.j2
index 4cee5f3..f010c66 100644
--- a/templates/group_created.json.j2
+++ b/templates/group_created.json.j2
@@ -239,7 +239,8 @@
 						"url" : "${init.input.keycloak_admin}/roles/Infrastructure-Member/composites",
 						"method" : "POST",
 						"headers" : {
-							"Authorization" : "Bearer ${authorize.output.body.access_token}"
+							"Authorization" : "Bearer ${authorize.output.body.access_token}",
+							"Content-Type" : "application/json"
 						},
 						"body" : "${to_array.output.resultList}"
 					}