diff --git a/mailman3/templates/core.yaml b/mailman3/templates/core.yaml
index ab4d873..bc7e328 100644
--- a/mailman3/templates/core.yaml
+++ b/mailman3/templates/core.yaml
@@ -60,7 +60,7 @@ spec:
             - name: DATABASE_CLASS
               value: mailman.database.postgresql.PostgreSQLDatabase
             - name: DATABASE_URL
-              value: "postgresql://{{ .Values.postgresql.global.postgresql.auth.username }}:{{ .Values.postgresql.global.postgresql.auth.password }}@postgresql/mailman"
+              value: "postgresql://{{ .Values.postgresql.global.postgresql.auth.username }}:{{ .Values.postgresql.global.postgresql.auth.password }}@{{ include 'mailman3/fullname' }}-postgresql/mailman"
             {{- else }}
             - name: DATABASE_CLASS
               value: mailman.database.sqlite.SQLiteDatabase
diff --git a/mailman3/templates/web.yaml b/mailman3/templates/web.yaml
index 703e91e..d3c794a 100644
--- a/mailman3/templates/web.yaml
+++ b/mailman3/templates/web.yaml
@@ -53,7 +53,7 @@ spec:
             {{- end }}
             {{- if .Values.postgresql.enabled }}
             - name: DATABASE_URL
-              value: "postgresql://{{ .Values.postgresql.global.postgresql.auth.username }}:{{ .Values.postgresql.global.postgresql.auth.password }}@postgresql/mailman"
+              value: "postgresql://{{ .Values.postgresql.global.postgresql.auth.username }}:{{ .Values.postgresql.global.postgresql.auth.password }}@{{ include 'mailman3/fullname' }}-postgresql/mailman"
             - name: DATABASE_TYPE
               value: postgresql
             {{- else }}