diff --git a/action.yml b/action.yml
index a0d155c..7fa1af2 100644
--- a/action.yml
+++ b/action.yml
@@ -41,8 +41,22 @@ inputs:
     default: ''
 
 runs:
-  using: 'docker'
-  image: 'Dockerfile'
+  using: 'composite'
+  steps:
+    - name: prettier
+      shell: bash
+      run: >-
+        PATH=$(cd $GITHUB_ACTION_PATH; npm bin):$PATH
+        INPUT_COMMIT_MESSAGE="${{ inputs.commit_message }}"
+        INPUT_COMMIT_OPTIONS="${{ inputs.commit_options }}"
+        INPUT_DRY="${{ inputs.dry }}"
+        INPUT_FILE_PATTERN="${{ inputs.file_pattern }}"
+        INPUT_ONLY_CHANGED="${{ inputs.only_changed }}"
+        INPUT_PRETTIER_OPTIONS="${{ inputs.prettier_options }}"
+        INPUT_PRETTIER_PLUGINS="${{ inputs.prettier_plugins }}"
+        INPUT_PRETTIER_VERSION="${{ inputs.prettier_version }}"
+        INPUT_SAME_COMMIT="${{ inputs.same_commit }}"
+        $GITHUB_ACTION_PATH/entrypoint.sh
 
 branding:
   icon: 'award'
diff --git a/entrypoint.sh b/entrypoint.sh
index 023e697..9a3812a 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 # e is for exiting the script automatically if a command fails, u is for exiting if a variable is not set
 # x would be for showing the commands before they are executed
 set -eu
@@ -25,14 +25,22 @@ _git_changed() {
     [[ -n "$(git status -s)" ]]
 }
 
+(
+if [ -n "$GITHUB_ACTION_PATH" ]; then
+    cd $GITHUB_ACTION_PATH
+    maybe_global=''
+else
+    maybe_global=--global
+fi
+
 # PROGRAM
 echo "Installing prettier..."
 case $INPUT_PRETTIER_VERSION in
     false)
-        npm install --silent --global prettier
+        npm install --silent $maybe_global prettier
         ;;
     *)
-        npm install --silent --global prettier@$INPUT_PRETTIER_VERSION
+        npm install --silent $maybe_global prettier@$INPUT_PRETTIER_VERSION
         ;;
 esac
 
@@ -46,8 +54,9 @@ if [ -n "$INPUT_PRETTIER_PLUGINS" ]; then
             exit 1
         fi
     done
-    npm install --silent --global $INPUT_PRETTIER_PLUGINS
+    npm install --silent $maybe_global $INPUT_PRETTIER_PLUGINS
 fi
+)
 
 echo "Prettifing files..."
 echo "Files:"