diff --git a/archaius-core/src/main/java/com/netflix/config/ConcurrentMapConfiguration.java b/archaius-core/src/main/java/com/netflix/config/ConcurrentMapConfiguration.java
index c70cd717d..fd3ccf56b 100644
--- a/archaius-core/src/main/java/com/netflix/config/ConcurrentMapConfiguration.java
+++ b/archaius-core/src/main/java/com/netflix/config/ConcurrentMapConfiguration.java
@@ -55,7 +55,7 @@
  *
  */
 public class ConcurrentMapConfiguration extends AbstractConfiguration {
-    protected ConcurrentHashMap<String,Object> map;
+    protected Map<String,Object> map;
     private Collection<ConfigurationListener> listeners = new CopyOnWriteArrayList<ConfigurationListener>();    
     private Collection<ConfigurationErrorListener> errorListeners = new CopyOnWriteArrayList<ConfigurationErrorListener>();    
     private static final Logger logger = LoggerFactory.getLogger(ConcurrentMapConfiguration.class);