diff --git a/services/terraform/self-host/keyserver_primary.tf b/services/terraform/self-host/keyserver_primary.tf
--- a/services/terraform/self-host/keyserver_primary.tf
+++ b/services/terraform/self-host/keyserver_primary.tf
@@ -41,6 +41,10 @@
 
       ]
       environment = [
+        {
+          name  = "REDIS_URL"
+          value = "rediss://${aws_elasticache_serverless_cache.redis.endpoint[0].address}:6379"
+        },
         {
           name  = "COMM_LISTEN_ADDR"
           value = "0.0.0.0"