diff --git a/README.md b/README.md
index 4941adc..5c70779 100644
--- a/README.md
+++ b/README.md
@@ -16,13 +16,14 @@ 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 |
 | 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! |
 
 ### Example Config
 
diff --git a/action.yml b/action.yml
index de6218f..684b0f6 100644
--- a/action.yml
+++ b/action.yml
@@ -12,7 +12,7 @@ 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:
@@ -27,6 +27,10 @@ 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 91abb9c..4baa4db 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 $INPUT_DRY; then
     echo "Prettier found unpretty files!"
     exit 1
@@ -50,8 +49,15 @@ then
     # Calling method to configure the git environemnt
     _git_setup
     echo "Commiting and pushing changes..."
-    # Add changes to git
-    git add "${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 ${INPUT_FILE_PATTERN}"
+    fi
     # Commit and push changes back
     git commit -m "$INPUT_COMMIT_MESSAGE" --author="$GITHUB_ACTOR <$GITHUB_ACTOR@users.noreply.github.com>" ${INPUT_COMMIT_OPTIONS:+"$INPUT_COMMIT_OPTIONS"}
     git push origin