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-rw-r--r--tools/dockerfile/interoptest/grpc_interop_csharpcoreclr/Dockerfile2
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/dockerfile/interoptest/grpc_interop_csharpcoreclr/Dockerfile b/tools/dockerfile/interoptest/grpc_interop_csharpcoreclr/Dockerfile
index 4ccfbc43c3..56b8be89ec 100644
--- a/tools/dockerfile/interoptest/grpc_interop_csharpcoreclr/Dockerfile
+++ b/tools/dockerfile/interoptest/grpc_interop_csharpcoreclr/Dockerfile
@@ -59,7 +59,7 @@ 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