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-rw-r--r--tools/dockerfile/interoptest/grpc_interop_ruby/Dockerfile2
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/dockerfile/interoptest/grpc_interop_ruby/Dockerfile b/tools/dockerfile/interoptest/grpc_interop_ruby/Dockerfile
index 7bcada68e0..2217b10b8b 100644
--- a/tools/dockerfile/interoptest/grpc_interop_ruby/Dockerfile
+++ b/tools/dockerfile/interoptest/grpc_interop_ruby/Dockerfile
@@ -60,7 +60,7 @@ RUN apt-get update && apt-get install -y \
python-pip
# Install Python packages from PyPI
-RUN pip install pip --upgrade
+RUN pip install --upgrade pip==9.0.1
RUN pip install virtualenv
RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.2.0 six==1.10.0 twisted==17.5.0