diff --git a/spring-data-geode-test/src/main/java/org/springframework/data/gemfire/tests/mock/context/GemFireMockObjectsApplicationContextInitializer.java b/spring-data-geode-test/src/main/java/org/springframework/data/gemfire/tests/mock/context/GemFireMockObjectsApplicationContextInitializer.java
index d6185db..a3e8d92 100644
--- a/spring-data-geode-test/src/main/java/org/springframework/data/gemfire/tests/mock/context/GemFireMockObjectsApplicationContextInitializer.java
+++ b/spring-data-geode-test/src/main/java/org/springframework/data/gemfire/tests/mock/context/GemFireMockObjectsApplicationContextInitializer.java
@@ -15,11 +15,10 @@
  */
 package org.springframework.data.gemfire.tests.mock.context;
 
-import com.sun.istack.NotNull;
-
 import org.springframework.context.ApplicationContextInitializer;
 import org.springframework.context.ConfigurableApplicationContext;
 import org.springframework.data.gemfire.tests.mock.beans.factory.config.GemFireMockObjectsBeanPostProcessor;
+import org.springframework.lang.NonNull;
 
 /**
  * A Spring {@link ApplicationContextInitializer} implementation used to initialize the Spring
@@ -40,7 +39,7 @@ public class GemFireMockObjectsApplicationContextInitializer
 		implements ApplicationContextInitializer<ConfigurableApplicationContext> {
 
 	@Override
-	public void initialize(@NotNull ConfigurableApplicationContext applicationContext) {
+	public void initialize(@NonNull ConfigurableApplicationContext applicationContext) {
 		applicationContext.getBeanFactory().addBeanPostProcessor(GemFireMockObjectsBeanPostProcessor.newInstance());
 	}
 }