diff --git a/README.md b/README.md
index f9c7096..b17dcb0 100644
--- a/README.md
+++ b/README.md
@@ -16,19 +16,21 @@ A GitHub action for styling files with [prettier](https://prettier.io).
 
 | Parameter | Required | Default | Description |
 | - | :-: | :-: | - |
-| dry | :x: | False | Runs the action in dry mode. Files wont get changed and the action fails if there are unprettified files. |
-| prettier_version | :x: | False | Specific prettier version (by default use latest) |
+| dry | :x: | false | Runs the action in dry mode. Files wont get changed and the action fails if there are unprettified files. |
+| prettier_version | :x: | false | Specific prettier version (by default use latest) |
 | prettier_options | :x: | `--write **/*.js` | Prettier options (by default it applies to the whole repository) |
 | commit_options | :x: | - | Custom git commit options |
 | same_commit | :x: | False | Whether to merge into the current commit instead of creating a new one |
 | commit_message | :x: | Prettified Code! | Custom git commit message |
-| file_pattern | :x: | * | Custom git add file pattern |
+| file_pattern | :x: | * | Custom git add file pattern, can't be used with only_changed! |
 | branch (depreciated with 3.0)| :white_check_mark: | - | Always set this to `${{ github.head_ref }}` in order to work both with pull requests and push events |
+| only_changed | :x: | false | Only prettify changed files, can't be used with file_pattern! This command works only with the checkout action set to fetch depth '0' (Example 2)|
 
 > Note: using the same_commit option may lead to problems if other actions are relying on the commit being the same before and after the prettier action has ran. Keep this in mind.
 
 ### Example Config
 
+#### Example 1 (run on push in master)
 ```yaml
 name: Continuous Integration
 
@@ -51,10 +53,42 @@ jobs:
         ref: ${{ github.head_ref }}
 
     - name: Prettify code
-      uses: creyD/prettier_action@v2.2
+      uses: creyD/prettier_action@v3.0
       with:
         # This part is also where you can pass other options, for example:
         prettier_options: --write **/*.{js,md}
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+```
+
+#### Example 2 (using the only_changed option on PR)
+```yaml
+name: Continuous Integration
+
+on:
+  pull_request:
+    branches: [master]
+
+jobs:
+  prettier:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v2
+      with:
+        # Make sure the actual branch is checked out when running on pull requests
+        ref: ${{ github.head_ref }}
+        # This is important to fetch the changes to the previous commit
+        fetch-depth: 0
+
+    - name: Prettify code
+      uses: creyD/prettier_action@v3.0
+      with:
+        # This part is also where you can pass other options, for example:
+        prettier_options: --write **/*.{js,md}
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 ```
 
 More documentation for writing a workflow can be found [here](https://help.github.com/en/actions/automating-your-workflow-with-github-actions/workflow-syntax-for-github-actions).
diff --git a/action.yml b/action.yml
index 7c10880..920f90c 100644
--- a/action.yml
+++ b/action.yml
@@ -16,7 +16,7 @@ inputs:
     description: Commit options
     required: false
   file_pattern:
-    description: File pattern used for `git add`
+    description: File pattern used for `git add`, can't be used with only_changed!
     required: false
     default: '*'
   prettier_options:
@@ -31,6 +31,10 @@ inputs:
     description: Specific version of prettier (by default just use the latest version)
     required: false
     default: false
+  only_changed:
+    description: Only prettify files changed in the last commit, can't be used with file_pattern!
+    required: false
+    default: false
 
 runs:
   using: 'docker'
diff --git a/entrypoint.sh b/entrypoint.sh
index 9650cc0..9b2eb5e 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -41,8 +41,7 @@ echo "Files:"
 prettier $INPUT_PRETTIER_OPTIONS || echo "Problem running prettier with $INPUT_PRETTIER_OPTIONS"
 
 # To keep runtime good, just continue if something was changed
-if _git_changed;
-then
+if _git_changed; then
   if $INPUT_DRY; then
     echo "Prettier found unpretty files!"
     exit 1
@@ -50,14 +49,21 @@ then
     # Calling method to configure the git environemnt
     _git_setup
     echo "Commiting and pushing changes..."
-    # Add changes to git
-    git add "${INPUT_FILE_PATTERN}" || echo "Problem adding your files with pattern ${INPUT_FILE_PATTERN}"
+    if $INPUT_ONLY_CHANGED; then
+      for file in $(git diff --name-only HEAD^..HEAD)
+      do
+        git add $file
+      done
+    else
+      # Add changes to git
+      git add "${INPUT_FILE_PATTERN}" || echo "Problem adding your files with pattern ${INPUT_FILE_PATTERN}"
+    fi
     # Commit and push changes back
     if $INPUT_SAME_COMMIT; then
       echo "Amending the current commit..."
       git commit --amend --no-edit
     else
-      git commit -m "$INPUT_COMMIT_MESSAGE" --author="$GITHUB_ACTOR <$GITHUB_ACTOR@users.noreply.github.com>" ${INPUT_COMMIT_OPTIONS:+"$INPUT_COMMIT_OPTIONS"}
+      git commit -m "$INPUT_COMMIT_MESSAGE" --author="$GITHUB_ACTOR <$GITHUB_ACTOR@users.noreply.github.com>" ${INPUT_COMMIT_OPTIONS:+"$INPUT_COMMIT_OPTIONS"} || echo "No files added to commit"
     fi
     git push origin
     echo "Changes pushed successfully."