diff --git a/jenkins/docker/Dockerfile b/jenkins/docker/Dockerfile
index 989e505b93..9c2a834dd8 100644
--- a/jenkins/docker/Dockerfile
+++ b/jenkins/docker/Dockerfile
@@ -115,7 +115,7 @@ RUN cd /tmp && \
   cd protobuf && \
   ./autogen.sh && \
   ./configure && \
-  make -j7 && \
+  make -j4 && \
   cd java && \
   $MVN install dependency:go-offline -Dmaven.repo.local=$MAVEN_REPO && \
   cd ../javanano && \