diff --git a/README.md b/README.md
index 10c5f0b..1a7e0b1 100644
--- a/README.md
+++ b/README.md
@@ -230,19 +230,19 @@ tutorial:
     networks:
         - default
     expose:
-        - "3000"
-        - "3001"
+        - '3000'
+        - '3001'
     ports:
-        - "3000:3000"
-        - "3001:3001"
+        - '3000:3000'
+        - '3001:3001'
     environment:
-        - "DEBUG=tutorial:*"
-        - "PORT=3000"
-        - "IOTA_HTTP_HOST=iot-agent"
-        - "IOTA_HTTP_PORT=7896"
-        - "DUMMY_DEVICES_PORT=3001"
-        - "DUMMY_DEVICES_API_KEY=4jggokgpepnvsb2uv4s40d59ov"
-        - "DUMMY_DEVICES_TRANSPORT=HTTP"
+        - 'DEBUG=tutorial:*'
+        - 'PORT=3000'
+        - 'IOTA_HTTP_HOST=iot-agent'
+        - 'IOTA_HTTP_PORT=7896'
+        - 'DUMMY_DEVICES_PORT=3001'
+        - 'DUMMY_DEVICES_API_KEY=4jggokgpepnvsb2uv4s40d59ov'
+        - 'DUMMY_DEVICES_TRANSPORT=HTTP'
 ```
 
 The `tutorial` container is listening on two ports:
@@ -281,11 +281,11 @@ iot-agent:
     networks:
         - default
     expose:
-        - "4041"
-        - "7896"
+        - '4041'
+        - '7896'
     ports:
-        - "4041:4041"
-        - "7896:7896"
+        - '4041:4041'
+        - '7896:7896'
     environment:
         - IOTA_CB_HOST=orion
         - IOTA_CB_PORT=1026