diff --git a/installers/charm/grafana/src/charm.py b/installers/charm/grafana/src/charm.py
index dc4dfd9..caa0277 100755
--- a/installers/charm/grafana/src/charm.py
+++ b/installers/charm/grafana/src/charm.py
@@ -209,6 +209,8 @@
             {
                 "admin-password": admin_initial_password,
                 "mysql-url": mysql_config.mysql_uri or self.mysql_client.get_uri(),
+                "prometheus-user": self.prometheus_client.user,
+                "prometheus-password": self.prometheus_client.password,
             },
         )
 
@@ -257,8 +259,8 @@
             envs={
                 "GF_SECURITY_ADMIN_PASSWORD": "admin-password",
                 "GF_DATABASE_URL": "mysql-url",
-                "PROMETHEUS_USER": self.prometheus_client.user,
-                "PROMETHEUS_PASSWORD": self.prometheus_client.password,
+                "PROMETHEUS_USER": "prometheus-user",
+                "PROMETHEUS_PASSWORD": "prometheus-password",
             },
         )
         container = container_builder.build()