diff --git a/python/README.md b/python/README.md
index 24a2886..f6abcac 100644
--- a/python/README.md
+++ b/python/README.md
@@ -169,7 +169,7 @@ the `gcr.io` container registry, so we'll tag it accordingly.
 
 ```bash
 export GCP_PROJECT=<Your GCP Project Name>
-docker build -t gcr.io/$GCP_PROJECT/grpc-calculator:latest
+docker build -t gcr.io/$GCP_PROJECT/grpc-calculator:latest .
 ```
 
 The tag above will change based on your GCP project name. We're calling the