diff --git a/apollo-client/src/main/java/com/ctrip/framework/apollo/build/ApolloInjector.java b/apollo-client/src/main/java/com/ctrip/framework/apollo/build/ApolloInjector.java
index 4c01e396d76..62177eebb8b 100644
--- a/apollo-client/src/main/java/com/ctrip/framework/apollo/build/ApolloInjector.java
+++ b/apollo-client/src/main/java/com/ctrip/framework/apollo/build/ApolloInjector.java
@@ -9,7 +9,7 @@
  * @author Jason Song(song_s@ctrip.com)
  */
 public class ApolloInjector {
-  private static Injector s_injector;
+  private static volatile Injector s_injector;
   private static Object lock = new Object();
 
   private static Injector getInjector() {
diff --git a/apollo-core/src/main/java/com/ctrip/framework/foundation/Foundation.java b/apollo-core/src/main/java/com/ctrip/framework/foundation/Foundation.java
index 31b40021b72..0c13b9fce95 100644
--- a/apollo-core/src/main/java/com/ctrip/framework/foundation/Foundation.java
+++ b/apollo-core/src/main/java/com/ctrip/framework/foundation/Foundation.java
@@ -13,7 +13,7 @@ public abstract class Foundation {
   private static final Logger logger = LoggerFactory.getLogger(Foundation.class);
   private static Object lock = new Object();
 
-  private static ProviderManager s_manager;
+  private static volatile ProviderManager s_manager;
 
   // Encourage early initialization and fail early if it happens.
   static {