diff --git a/src/main/java/graphql/servlet/SimpleGraphQLServlet.java b/src/main/java/graphql/servlet/SimpleGraphQLServlet.java
index b8a12471..3c6f29e3 100644
--- a/src/main/java/graphql/servlet/SimpleGraphQLServlet.java
+++ b/src/main/java/graphql/servlet/SimpleGraphQLServlet.java
@@ -90,7 +90,7 @@ public SimpleGraphQLServlet(GraphQLSchemaProvider schemaProvider, ExecutionStrat
         }
     }
 
-    private SimpleGraphQLServlet(Builder builder) {
+    protected SimpleGraphQLServlet(Builder builder) {
         super(builder.objectMapperConfigurer, builder.listeners, null);
 
         this.schemaProvider = builder.schemaProvider;