regenerate from template
diff --git a/tools/dockerfile/test/php7_jessie_x64/Dockerfile b/tools/dockerfile/test/php7_jessie_x64/Dockerfile
index 2213389..c0b394e 100644
--- a/tools/dockerfile/test/php7_jessie_x64/Dockerfile
+++ b/tools/dockerfile/test/php7_jessie_x64/Dockerfile
@@ -88,7 +88,7 @@
# Install Python packages from PyPI
RUN pip install pip --upgrade
RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.0.0a2 six==1.10.0
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.0.0a2
# Prepare ccache
RUN ln -s /usr/bin/ccache /usr/local/bin/gcc