diff --git a/Dockerfile b/Dockerfile
index 47bc6ca..4703b01 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -14,9 +14,11 @@ COPY . ./
 # Install production dependencies.
 RUN pip install --no-cache-dir -r requirements.txt
 
+EXPOSE 8080
+
 # Run the web service on container startup. Here we use the gunicorn
 # webserver, with one worker process and 8 threads.
 # For environments with multiple CPU cores, increase the number of workers
 # to be equal to the cores available.
 # Timeout is set to 0 to disable the timeouts of the workers to allow Cloud Run to handle instance scaling.
-CMD exec gunicorn --bind :$PORT --workers 1 --threads 8 --timeout 0 main:app
+CMD exec gunicorn --bind :8080 --workers 1 --threads 8 --timeout 0 main:app