diff --git a/src/main/java/org/socialsignin/spring/data/dynamodb/repository/config/DynamoDBMapperFactory.java b/src/main/java/org/socialsignin/spring/data/dynamodb/repository/config/DynamoDBMapperFactory.java
index 9d4528c9..8cb5e801 100644
--- a/src/main/java/org/socialsignin/spring/data/dynamodb/repository/config/DynamoDBMapperFactory.java
+++ b/src/main/java/org/socialsignin/spring/data/dynamodb/repository/config/DynamoDBMapperFactory.java
@@ -35,8 +35,7 @@ public DynamoDBMapperFactory() {
 	}
 
 	@Override
-	public synchronized DynamoDBMapper getObject() throws Exception {
-		// fix issue #230
+	public DynamoDBMapper getObject() throws Exception {
 		return new DynamoDBMapper(amazonDynamoDB, dynamoDBMapperConfig);
 	}
 
diff --git a/src/main/java/org/socialsignin/spring/data/dynamodb/repository/config/DynamoDBRepositoryConfigExtension.java b/src/main/java/org/socialsignin/spring/data/dynamodb/repository/config/DynamoDBRepositoryConfigExtension.java
index af5fae4b..dd52c2da 100644
--- a/src/main/java/org/socialsignin/spring/data/dynamodb/repository/config/DynamoDBRepositoryConfigExtension.java
+++ b/src/main/java/org/socialsignin/spring/data/dynamodb/repository/config/DynamoDBRepositoryConfigExtension.java
@@ -17,6 +17,7 @@
 
 import java.util.HashMap;
 import java.util.Map;
+import java.util.Optional;
 import java.util.concurrent.ConcurrentHashMap;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -226,10 +227,14 @@ public void registerBeansForRoot(BeanDefinitionRegistry registry,
 		// Store for later to be used by #postProcess, too
 		this.registry = registry;
 
-		BeanDefinitionBuilder dynamoDBMapperConfigBuiilder = BeanDefinitionBuilder
-				.genericBeanDefinition(DynamoDBMapperConfigFactory.class);
-		registry.registerBeanDefinition(getBeanNameWithModulePrefix("DynamoDBMapperConfig"),
-				dynamoDBMapperConfigBuiilder.getBeanDefinition());
+		// Fix issue #233
+		Optional dynamoDBMapperConfigRef = configurationSource.getAttribute("dynamoDBMapperConfigRef");
+		if (!dynamoDBMapperConfigRef.isPresent()) {
+			BeanDefinitionBuilder dynamoDBMapperConfigBuiilder = BeanDefinitionBuilder
+					.genericBeanDefinition(DynamoDBMapperConfigFactory.class);
+			registry.registerBeanDefinition(getBeanNameWithModulePrefix("DynamoDBMapperConfig"),
+					dynamoDBMapperConfigBuiilder.getBeanDefinition());
+		}
 
 		BeanDefinitionBuilder dynamoDBMapperBuilder = BeanDefinitionBuilder
 				.genericBeanDefinition(DynamoDBMapperFactory.class);