diff --git a/kubernetes/operationcode_backend/deployment.yml b/kubernetes/operationcode_backend/deployment.yml
index 681d486..5d5ca85 100644
--- a/kubernetes/operationcode_backend/deployment.yml
+++ b/kubernetes/operationcode_backend/deployment.yml
@@ -22,6 +22,8 @@ spec:
             secretKeyRef:
               name: backend-secrets
               key: postgres_password
+        - name: POSTGRES_HOST
+          value: operationcode-staging-psql-postgresql
         - name: REDIS_URL
           value: redis://operationcode-redis-redis:6379/0
         - name: RAILS_ENV
@@ -59,6 +61,8 @@ spec:
             secretKeyRef:
               name: backend-secrets
               key: postgres_password
+        - name: POSTGRES_HOST
+          value: operationcode-staging-psql-postgresql
         - name: REDIS_URL
           value: redis://operationcode-redis-redis:6379/0
         - name: SLACK_SUBDOMAIN