diff --git a/hylang/README-content.md b/hylang/README-content.md
index e293c0331..edfdb01e2 100644
--- a/hylang/README-content.md
+++ b/hylang/README-content.md
@@ -22,4 +22,4 @@ Then build and run the docker image.
 
 For many single file projects, it may not be convenient to write a `Dockerfile` for your project. In such cases, you can run a hylang script by using the hylang docker image directly.
 
-    docker run -it --rm --name my-running-script -v "$(pwd)":/usr/src/myapp -w /usr/src/myapp hylang:0.10.0 hy your-daemon-or-script.py
+    docker run -it --rm --name my-running-script -v "$(pwd)":/usr/src/myapp -w /usr/src/myapp hylang:0.10.0 hy your-daemon-or-script.hy
diff --git a/hylang/README.md b/hylang/README.md
index 36080bfe2..f399dc61e 100644
--- a/hylang/README.md
+++ b/hylang/README.md
@@ -22,7 +22,7 @@ Then build and run the docker image.
 
 For many single file projects, it may not be convenient to write a `Dockerfile` for your project. In such cases, you can run a hylang script by using the hylang docker image directly.
 
-    docker run -it --rm --name my-running-script -v "$(pwd)":/usr/src/myapp -w /usr/src/myapp hylang:0.10.0 hy your-daemon-or-script.py
+    docker run -it --rm --name my-running-script -v "$(pwd)":/usr/src/myapp -w /usr/src/myapp hylang:0.10.0 hy your-daemon-or-script.hy
 
 # User Feedback