diff --git a/spring-data-mongodb/src/main/java/org/springframework/data/mongodb/repository/MongoRepository.java b/spring-data-mongodb/src/main/java/org/springframework/data/mongodb/repository/MongoRepository.java
index 8c5a37613..64324e8e1 100644
--- a/spring-data-mongodb/src/main/java/org/springframework/data/mongodb/repository/MongoRepository.java
+++ b/spring-data-mongodb/src/main/java/org/springframework/data/mongodb/repository/MongoRepository.java
@@ -15,7 +15,6 @@
  */
 package org.springframework.data.mongodb.repository;
 
-import java.io.Serializable;
 import java.util.List;
 
 import org.springframework.data.domain.Example;
@@ -33,8 +32,7 @@ import org.springframework.data.repository.query.QueryByExampleExecutor;
  * @author Mark Paluch
  */
 @NoRepositoryBean
-public interface MongoRepository<T, ID extends Serializable>
-		extends PagingAndSortingRepository<T, ID>, QueryByExampleExecutor<T> {
+public interface MongoRepository<T, ID> extends PagingAndSortingRepository<T, ID>, QueryByExampleExecutor<T> {
 
 	/*
 	 * (non-Javadoc)
diff --git a/spring-data-mongodb/src/main/java/org/springframework/data/mongodb/repository/support/SimpleMongoRepository.java b/spring-data-mongodb/src/main/java/org/springframework/data/mongodb/repository/support/SimpleMongoRepository.java
index 18d06b027..1e0830d71 100644
--- a/spring-data-mongodb/src/main/java/org/springframework/data/mongodb/repository/support/SimpleMongoRepository.java
+++ b/spring-data-mongodb/src/main/java/org/springframework/data/mongodb/repository/support/SimpleMongoRepository.java
@@ -17,7 +17,6 @@ package org.springframework.data.mongodb.repository.support;
 
 import static org.springframework.data.mongodb.core.query.Criteria.*;
 
-import java.io.Serializable;
 import java.util.Collections;
 import java.util.List;
 import java.util.Optional;
@@ -47,7 +46,7 @@ import org.springframework.util.Assert;
  * @author Thomas Darimont
  * @author Mark Paluch
  */
-public class SimpleMongoRepository<T, ID extends Serializable> implements MongoRepository<T, ID> {
+public class SimpleMongoRepository<T, ID> implements MongoRepository<T, ID> {
 
 	private final MongoOperations mongoOperations;
 	private final MongoEntityInformation<T, ID> entityInformation;