diff --git a/src/main/java/com/github/tomakehurst/wiremock/extension/MetricsPublisher.java b/src/main/java/com/github/tomakehurst/wiremock/extension/MetricsPublisher.java
index f7e34a424b..379592753f 100644
--- a/src/main/java/com/github/tomakehurst/wiremock/extension/MetricsPublisher.java
+++ b/src/main/java/com/github/tomakehurst/wiremock/extension/MetricsPublisher.java
@@ -1,8 +1,6 @@
 package com.github.tomakehurst.wiremock.extension;
 
 
-import com.sun.istack.internal.Nullable;
-
 import java.util.function.ToDoubleFunction;
 
 public interface MetricsPublisher extends Extension {
@@ -10,5 +8,5 @@ public interface MetricsPublisher extends Extension {
 
   boolean counter(String name, String... tags);
 
-  <T> T gauge(String name, @Nullable T stateObject, ToDoubleFunction<T> valueFunction, String... tags);
+  <T> T gauge(String name, T stateObject, ToDoubleFunction<T> valueFunction, String... tags);
 }