diff --git a/README.md b/README.md
index 9225b76..3dd30a3 100644
--- a/README.md
+++ b/README.md
@@ -37,7 +37,7 @@ Because software tools are for people. If you don’t care, why are you contribu
 
 ## Installation
 
-	gem install github_changelog_generator
+    gem install github_changelog_generator
 
 See also Troubleshooting.
 
@@ -46,7 +46,7 @@ See also Troubleshooting.
 - Look at **[CHANGELOG.md](https://github.com/skywinder/Github-Changelog-Generator/blob/master/CHANGELOG.md)** for this project
 - [ActionSheetPicker-3.0/CHANGELOG.md](https://github.com/skywinder/ActionSheetPicker-3.0/blob/master/CHANGELOG.md)  was generated by command:
 
-		github_changelog_generator -u skywinder -p ActionSheetPicker-3.0
+      github_changelog_generator -u skywinder -p ActionSheetPicker-3.0
 
 - In general, it looks like this:
 
@@ -116,7 +116,7 @@ Here's how:
 
 You can set an environment variable by running the following command at the prompt, or by adding it to your shell profile (e.g., `~/.bash_profile` or `~/.zshrc`):
 
-      export CHANGELOG_GITHUB_TOKEN="«your-40-digit-github-token»"
+    export CHANGELOG_GITHUB_TOKEN="«your-40-digit-github-token»"
 
 So, if you get a message like this: