diff --git a/spring-data-geode/src/main/java/org/springframework/data/gemfire/config/annotation/AbstractCacheConfiguration.java b/spring-data-geode/src/main/java/org/springframework/data/gemfire/config/annotation/AbstractCacheConfiguration.java
index 98e5a542..30ba5788 100644
--- a/spring-data-geode/src/main/java/org/springframework/data/gemfire/config/annotation/AbstractCacheConfiguration.java
+++ b/spring-data-geode/src/main/java/org/springframework/data/gemfire/config/annotation/AbstractCacheConfiguration.java
@@ -121,7 +121,7 @@ public abstract class AbstractCacheConfiguration extends AbstractAnnotationConfi
 	private List<JndiDataSource> jndiDataSources;
 	private List<TransactionListener> transactionListeners;
 
-	private PropertiesBuilder customGemFireProperties = PropertiesBuilder.create();
+	private final PropertiesBuilder customGemFireProperties = PropertiesBuilder.create();
 
 	private Resource cacheXml;
 
diff --git a/spring-data-geode/src/main/java/org/springframework/data/gemfire/config/annotation/ClientCacheConfiguration.java b/spring-data-geode/src/main/java/org/springframework/data/gemfire/config/annotation/ClientCacheConfiguration.java
index 2e0797ff..9268d625 100644
--- a/spring-data-geode/src/main/java/org/springframework/data/gemfire/config/annotation/ClientCacheConfiguration.java
+++ b/spring-data-geode/src/main/java/org/springframework/data/gemfire/config/annotation/ClientCacheConfiguration.java
@@ -108,7 +108,7 @@ public class ClientCacheConfiguration extends AbstractCacheConfiguration {
 	private Iterable<ConnectionEndpoint> servers;
 
 	@Autowired(required = false)
-	private List<ClientCacheConfigurer> clientCacheConfigurers = Collections.emptyList();
+	private final List<ClientCacheConfigurer> clientCacheConfigurers = Collections.emptyList();
 
 	private Long idleTimeout;
 	private Long pingInterval;