diff --git a/spring-data-mongodb/pom.xml b/spring-data-mongodb/pom.xml
index e82d4cc68..985039439 100644
--- a/spring-data-mongodb/pom.xml
+++ b/spring-data-mongodb/pom.xml
@@ -13,7 +13,7 @@
 
 	<properties>
 		<mongo.version>2.7.1</mongo.version>
-		<querydsl.version>2.2.4</querydsl.version>
+		<querydsl.version>2.2.5</querydsl.version>
 	</properties>
 
 	<dependencies>
diff --git a/spring-data-mongodb/src/main/java/org/springframework/data/mongodb/repository/support/QueryDslMongoRepository.java b/spring-data-mongodb/src/main/java/org/springframework/data/mongodb/repository/support/QueryDslMongoRepository.java
index 3b5ef4ced..e0f42534e 100644
--- a/spring-data-mongodb/src/main/java/org/springframework/data/mongodb/repository/support/QueryDslMongoRepository.java
+++ b/spring-data-mongodb/src/main/java/org/springframework/data/mongodb/repository/support/QueryDslMongoRepository.java
@@ -17,6 +17,7 @@ package org.springframework.data.mongodb.repository.support;
 
 import java.io.Serializable;
 import java.util.List;
+import java.util.regex.Pattern;
 
 import org.apache.commons.collections15.Transformer;
 import org.springframework.data.domain.Page;
@@ -27,6 +28,7 @@ import org.springframework.data.domain.Sort.Order;
 import org.springframework.data.mapping.context.MappingContext;
 import org.springframework.data.mongodb.core.MongoOperations;
 import org.springframework.data.mongodb.core.MongoTemplate;
+import org.springframework.data.mongodb.core.convert.MongoConverter;
 import org.springframework.data.mongodb.core.mapping.MongoPersistentEntity;
 import org.springframework.data.mongodb.core.mapping.MongoPersistentProperty;
 import org.springframework.data.mongodb.repository.query.MongoEntityInformation;
@@ -35,6 +37,7 @@ import org.springframework.data.querydsl.QueryDslPredicateExecutor;
 import org.springframework.data.querydsl.SimpleEntityPathResolver;
 import org.springframework.data.repository.core.EntityMetadata;
 import org.springframework.util.Assert;
+
 import com.mongodb.DBCollection;
 import com.mongodb.DBObject;
 import com.mysema.query.mongodb.MongodbQuery;
@@ -85,7 +88,7 @@ public class QueryDslMongoRepository<T, ID extends Serializable> extends SimpleM
 		Assert.notNull(resolver);
 		EntityPath<T> path = resolver.createPath(entityInformation.getJavaType());
 		this.builder = new PathBuilder<T>(path.getType(), path.getMetadata());
-		this.serializer = new SpringDataMongodbSerializer(mongoOperations.getConverter().getMappingContext());
+		this.serializer = new SpringDataMongodbSerializer(mongoOperations.getConverter());
 	}
 
 	/*
@@ -230,14 +233,17 @@ public class QueryDslMongoRepository<T, ID extends Serializable> extends SimpleM
 	 */
 	static class SpringDataMongodbSerializer extends MongodbSerializer {
 
+		private final MongoConverter converter;
 		private final MappingContext<? extends MongoPersistentEntity<?>, MongoPersistentProperty> mappingContext;
 
 		/**
 		 * Creates a new {@link SpringDataMongodbSerializer} for the given {@link MappingContext}.
+		 * 
 		 * @param mappingContext
 		 */
-		public SpringDataMongodbSerializer(MappingContext<? extends MongoPersistentEntity<?>, MongoPersistentProperty> mappingContext) {
-			this.mappingContext = mappingContext;
+		public SpringDataMongodbSerializer(MongoConverter converter) {
+			this.mappingContext = converter.getMappingContext();
+			this.converter = converter;
 		}
 
 		@Override
@@ -248,5 +254,11 @@ public class QueryDslMongoRepository<T, ID extends Serializable> extends SimpleM
 			MongoPersistentProperty property = entity.getPersistentProperty(metadata.getExpression().toString());
 			return property.getFieldName();
 		}
+
+		@Override
+		protected DBObject asDBObject(String key, Object value) {
+
+			return super.asDBObject(key, value instanceof Pattern ? value : converter.convertToMongoType(value));
+		}
 	}
 }
diff --git a/spring-data-mongodb/src/test/java/org/springframework/data/mongodb/repository/support/SpringDataMongodbSerializerUnitTests.java b/spring-data-mongodb/src/test/java/org/springframework/data/mongodb/repository/support/SpringDataMongodbSerializerUnitTests.java
index fb4956c01..5df9fd1f6 100644
--- a/spring-data-mongodb/src/test/java/org/springframework/data/mongodb/repository/support/SpringDataMongodbSerializerUnitTests.java
+++ b/spring-data-mongodb/src/test/java/org/springframework/data/mongodb/repository/support/SpringDataMongodbSerializerUnitTests.java
@@ -18,11 +18,21 @@ package org.springframework.data.mongodb.repository.support;
 import static org.hamcrest.CoreMatchers.*;
 import static org.junit.Assert.*;
 
+import org.junit.Before;
 import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.runners.MockitoJUnitRunner;
+import org.springframework.data.mongodb.MongoDbFactory;
+import org.springframework.data.mongodb.core.convert.MappingMongoConverter;
+import org.springframework.data.mongodb.core.convert.MongoConverter;
+import org.springframework.data.mongodb.core.mapping.Field;
 import org.springframework.data.mongodb.core.mapping.MongoMappingContext;
 import org.springframework.data.mongodb.repository.QPerson;
 import org.springframework.data.mongodb.repository.support.QueryDslMongoRepository.SpringDataMongodbSerializer;
 
+import com.mongodb.BasicDBObject;
+import com.mongodb.DBObject;
 import com.mysema.query.types.path.StringPath;
 
 /**
@@ -30,10 +40,20 @@ import com.mysema.query.types.path.StringPath;
  * 
  * @author Oliver Gierke
  */
+@RunWith(MockitoJUnitRunner.class)
 public class SpringDataMongodbSerializerUnitTests {
 	
-	MongoMappingContext context = new MongoMappingContext();
-	SpringDataMongodbSerializer serializer = new QueryDslMongoRepository.SpringDataMongodbSerializer(context);
+	@Mock
+	MongoDbFactory dbFactory;
+	MongoConverter converter;
+	SpringDataMongodbSerializer serializer;
+	
+	@Before
+	public void setUp() {
+		MongoMappingContext context = new MongoMappingContext();
+		converter = new MappingMongoConverter(dbFactory, context);
+		serializer = new QueryDslMongoRepository.SpringDataMongodbSerializer(converter);
+	}
 	
 	@Test
 	public void uses_idAsKeyForIdProperty() {
@@ -47,4 +67,29 @@ public class SpringDataMongodbSerializerUnitTests {
 		StringPath path = QPerson.person.address.street;
 		assertThat(serializer.getKeyForPath(path, path.getMetadata()), is("street"));
 	}
+	
+	@Test
+	public void convertsComplexObjectOnSerializing() {
+		
+		Address address = new Address();
+		address.street = "Foo";
+		address.zipCode = "01234";
+		
+		DBObject result = serializer.asDBObject("foo", address);
+		assertThat(result, is(BasicDBObject.class));
+		BasicDBObject dbObject = (BasicDBObject) result;
+		
+		Object value = dbObject.get("foo");
+		assertThat(value, is(notNullValue()));
+		assertThat(value, is(BasicDBObject.class));
+		
+		Object reference = converter.convertToMongoType(address);
+		assertThat(value, is(reference));
+	}
+	
+	class Address {
+		String street;
+		@Field("zip_code")
+		String zipCode;
+	}
 }