diff --git a/src/main/java/gyro/aws/rds/DbClusterEndpointResource.java b/src/main/java/gyro/aws/rds/DbClusterEndpointResource.java
index c9740e2f5..b226759b7 100644
--- a/src/main/java/gyro/aws/rds/DbClusterEndpointResource.java
+++ b/src/main/java/gyro/aws/rds/DbClusterEndpointResource.java
@@ -96,7 +96,7 @@ public void setDbCluster(DbClusterResource dbCluster) {
      */
     @Required
     @Updatable
-    @ValidStrings({"READER", "ANY"})
+    @ValidStrings({"READER", "WRITER", "ANY"})
     public String getEndpointType() {
         return endpointType;
     }