diff --git a/source-code/chapter-4/exercise-1/docker-hello-world/Dockerfile b/source-code/chapter-4/exercise-1/docker-hello-world/Dockerfile
index 7c1d5ab..620cf40 100644
--- a/source-code/chapter-4/exercise-1/docker-hello-world/Dockerfile
+++ b/source-code/chapter-4/exercise-1/docker-hello-world/Dockerfile
@@ -1,9 +1,8 @@
 FROM python:3-alpine
 
-LABEL author="sathyabhat"
 LABEL description="Dockerfile for Python script which prints Hello, Name"
 
 COPY hello-world.py /app/
-ENV NAME=Sathya
+ENV NAME=Readers
 CMD python3 /app/hello-world.py
 
diff --git a/source-code/chapter-4/exercise-1/docker-hello-world/hello-world.py b/source-code/chapter-4/exercise-1/docker-hello-world/hello-world.py
index 850eed0..49e450d 100644
--- a/source-code/chapter-4/exercise-1/docker-hello-world/hello-world.py
+++ b/source-code/chapter-4/exercise-1/docker-hello-world/hello-world.py
@@ -1,10 +1,8 @@
 #!/usr/bin/env python3
-
 from os import getenv
 
 if getenv('NAME') is None:
     name = 'World'
 else:
     name = getenv('NAME')
-
-print("Hello, {}!".format(name))
+print(f"Hello, {name}!")