diff --git a/build/docker/old/debian-jessie/Dockerfile b/build/docker/old/debian-jessie/Dockerfile
index 7bc74fc..941b4bb 100644
--- a/build/docker/old/debian-jessie/Dockerfile
+++ b/build/docker/old/debian-jessie/Dockerfile
@@ -79,6 +79,7 @@
 RUN apt-get install -y --no-install-recommends \
 `# Ruby dependencies` \
       ruby \
+      ruby-bundler \
       ruby-dev \
 `# Perl dependencies` \
       libbit-vector-perl \
diff --git a/contrib/thrift-maven-plugin/pom.xml b/contrib/thrift-maven-plugin/pom.xml
index 1d66bc6..b65f6aa 100644
--- a/contrib/thrift-maven-plugin/pom.xml
+++ b/contrib/thrift-maven-plugin/pom.xml
@@ -7,9 +7,9 @@
  to you under the Apache License, Version 2.0 (the
  "License"); you may not use this file except in compliance
  with the License. You may obtain a copy of the License at
- 
+
    http://www.apache.org/licenses/LICENSE-2.0
- 
+
  Unless required by applicable law or agreed to in writing,
  software distributed under the License is distributed on an
  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
@@ -17,8 +17,8 @@
  specific language governing permissions and limitations
  under the License.
  -->
-<project 
-  xmlns="http://maven.apache.org/POM/4.0.0" 
+<project
+  xmlns="http://maven.apache.org/POM/4.0.0"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">