diff --git a/templates/tools/dockerfile/interoptest/grpc_interop_http2/Dockerfile.template b/templates/tools/dockerfile/interoptest/grpc_interop_http2/Dockerfile.template
index 38a5ca725da..6204c3e2cb2 100644
--- a/templates/tools/dockerfile/interoptest/grpc_interop_http2/Dockerfile.template
+++ b/templates/tools/dockerfile/interoptest/grpc_interop_http2/Dockerfile.template
@@ -33,6 +33,8 @@
   
   <%include file="../../go_path.include"/>
   <%include file="../../python_deps.include"/>
+  RUN pip install twisted h2
+
   # Define the default command.
   CMD ["bash"]
   
diff --git a/tools/dockerfile/interoptest/grpc_interop_http2/Dockerfile b/tools/dockerfile/interoptest/grpc_interop_http2/Dockerfile
index 05e963d1e67..3a5e15d21bd 100644
--- a/tools/dockerfile/interoptest/grpc_interop_http2/Dockerfile
+++ b/tools/dockerfile/interoptest/grpc_interop_http2/Dockerfile
@@ -47,5 +47,7 @@ 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 twisted h2
+
 # Define the default command.
 CMD ["bash"]