Merge "virtualenv lib changed. need to pin to older version."
diff --git a/ms/command-executor/src/main/docker/Dockerfile b/ms/command-executor/src/main/docker/Dockerfile
index b28e580..70cf943 100644
--- a/ms/command-executor/src/main/docker/Dockerfile
+++ b/ms/command-executor/src/main/docker/Dockerfile
@@ -3,7 +3,7 @@
 ENV GRPC_PYTHON_VERSION 1.20.0
 RUN python -m pip install --upgrade pip
 RUN pip install grpcio==${GRPC_PYTHON_VERSION} grpcio-tools==${GRPC_PYTHON_VERSION}
-RUN pip install virtualenv
+RUN pip install virtualenv==16.7.9
 
 COPY start.sh /opt/app/onap/start.sh
 RUN chmod u+x /opt/app/onap/start.sh