diff --git a/kube/postgres.libsonnet b/kube/postgres.libsonnet
index e89e9db..a80c236 100644
--- a/kube/postgres.libsonnet
+++ b/kube/postgres.libsonnet
@@ -18,6 +18,12 @@
         password: error "password must be set",
 
         storageSize: "30Gi",
+
+        # This option can be used to customize initial database creation. For
+        # available options see: https://www.postgresql.org/docs/9.5/app-initdb.html
+        # Changing this option in already existing deployments will not affect
+        # existing database.
+        initdbArgs: null,
     },
 
     makeName(suffix):: cfg.prefix + suffix,
@@ -63,7 +69,9 @@
                                 POSTGRES_USER: cfg.username,
                                 POSTGRES_PASSWORD: cfg.password,
                                 PGDATA: "/var/lib/postgresql/data/pgdata",
-                            },
+                            } + if cfg.initdbArgs != null then {
+                                POSTGRES_INITDB_ARGS: cfg.initdbArgs,
+                            } else {},
                             volumeMounts_: {
                                 data: { mountPath: "/var/lib/postgresql/data" },
                             },