diff --git a/Dockerfile b/Dockerfile
index 22fa24b..b1d894a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -8,7 +8,7 @@ COPY checkpoint /checkpoint
 # Make changes to the requirements/app here.
 # This Dockerfile order allows Docker to cache the checkpoint layer
 # and improve build times if making changes.
-RUN pip3 --no-cache-dir install tensorflow==1.15.2 gpt-2-simple starlette uvicorn ujson
+RUN pip3 --no-cache-dir install tensorflow==1.15.2 gpt-2-simple starlette==0.13.8 uvicorn ujson
 COPY app.py /
 
 # Clean up APT when done.