diff --git a/build-docker.sh b/build-docker.sh
index b39336186..42f906895 100755
--- a/build-docker.sh
+++ b/build-docker.sh
@@ -8,7 +8,8 @@ set -x
 GPU=""
 BASE_IMAGE="ubuntu:focal"
 WHEEL_URL="https://s3-us-west-2.amazonaws.com/ray-wheels/latest/ray-2.0.0.dev0-cp37-cp37m-manylinux2014_x86_64.whl"
-PYTHON_VERSION=""
+PYTHON_VERSION="3.7.7"
+
 
 while [[ $# -gt 0 ]]
 do
@@ -41,6 +42,7 @@ case $key in
     --python-version)
     # Python version to install. e.g. 3.7.7.
     # Changing python versions may require a different wheel.
+    # If not provided defaults to 3.7.7
     shift
     PYTHON_VERSION=$1
     ;;
@@ -59,7 +61,7 @@ for IMAGE in "base-deps" "ray-deps" "ray"
 do
     cp "$WHEEL" "docker/$IMAGE/$(basename "$WHEEL")"
     if [ $OUTPUT_SHA ]; then
-        IMAGE_SHA=$(docker build $NO_CACHE --build-arg GPU="$GPU" --build-arg BASE_IMAGE="$BASE_IMAGE" --build-arg WHEEL_PATH="$(basename "$WHEEL")" -q -t rayproject/$IMAGE:nightly$GPU docker/$IMAGE)
+        IMAGE_SHA=$(docker build $NO_CACHE --build-arg GPU="$GPU" --build-arg BASE_IMAGE="$BASE_IMAGE" --build-arg WHEEL_PATH="$(basename "$WHEEL")" --build-arg PYTHON_VERSION="$PYTHON_VERSION" -q -t rayproject/$IMAGE:nightly$GPU docker/$IMAGE)
         echo "rayproject/$IMAGE:nightly$GPU SHA:$IMAGE_SHA"
     else
         docker build $NO_CACHE  --build-arg GPU="$GPU" --build-arg BASE_IMAGE="$BASE_IMAGE" --build-arg WHEEL_PATH="$(basename "$WHEEL")" --build-arg PYTHON_VERSION="$PYTHON_VERSION" -t rayproject/$IMAGE:nightly$GPU docker/$IMAGE