diff --git a/Dockerfile b/Dockerfile
deleted file mode 100644
index cfd542a..0000000
--- a/Dockerfile
+++ /dev/null
@@ -1,4 +0,0 @@
-FROM node:lts-alpine3.9
-RUN apk update && apk add --no-cache bash git openssh
-COPY entrypoint.sh /entrypoint.sh
-ENTRYPOINT ["/entrypoint.sh"]
diff --git a/README.md b/README.md
index e689898..965ae9a 100644
--- a/README.md
+++ b/README.md
@@ -16,14 +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. |
+| dry | :x: | `false` | Runs the action in dry mode. Files wont get changed and the action fails if there are unprettified files. Recommended to use with prettier_options --check |
 | 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` | Update the current commit instead of creating a new one, created by [Joren Broekema](https://github.com/jorenbroekema), this command works only with the checkout action set to fetch depth '0' (see example 2)  |
 | commit_message | :x: | `"Prettified Code!"` | Custom git commit message, will be ignored if used with `same_commit` |
 | file_pattern | :x: | `*` | Custom git add file pattern, can't be used with only_changed! |
-| prettier_plugins | :x: | ` ` | Install Prettier plugins, i.e. `@prettier/prettier-php @prettier/some-other-plugin` |
+| prettier_plugins | :x: | - | Install Prettier plugins, i.e. `@prettier/plugin-php @prettier/plugin-other` |
 | 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' (see 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.
diff --git a/action.yml b/action.yml
index a0d155c..68f612f 100644
--- a/action.yml
+++ b/action.yml
@@ -7,7 +7,7 @@ inputs:
   commit_message:
     description: Commit message, will be ignored if used with same_commit
     required: false
-    default: 'Prettified Code!'
+    default: "Prettified Code!"
   same_commit:
     description: Update the current commit instead of creating a new one
     required: false
@@ -18,11 +18,11 @@ inputs:
   file_pattern:
     description: File pattern used for `git add`, can't be used with only_changed!
     required: false
-    default: '*'
+    default: "*"
   prettier_options:
     description: Options for the `prettier` command
     required: false
-    default: '--write **/*.js'
+    default: "--write **/*.js"
   dry:
     description: Running the script in dry mode just shows whether there are files that should be prettified or not
     required: false
@@ -36,14 +36,28 @@ inputs:
     required: false
     default: false
   prettier_plugins:
-    description: Install Prettier plugins, i.e. `@prettier/prettier-php @prettier/some-other-plugin`
+    description: Install Prettier plugins, i.e. `@prettier/plugin-php @prettier/plugin-other`
     required: false
-    default: ''
 
 runs:
-  using: 'docker'
-  image: 'Dockerfile'
+  using: "composite"
+  steps:
+    - name: Prettify code!
+      shell: bash
+      run: >-
+        PATH=$(cd $GITHUB_ACTION_PATH; npm bin):$PATH
+        ${{ github.action_path }}/entrypoint.sh
+      env:
+        INPUT_COMMIT_MESSAGE: ${{ inputs.commit_message }}
+        INPUT_SAME_COMMIT: ${{ inputs.same_commit }}
+        INPUT_COMMIT_OPTIONS: ${{ inputs.commit_options }}
+        INPUT_FILE_PATTERN: ${{ inputs.file_pattern }}
+        INPUT_PRETTIER_OPTIONS: ${{ inputs.prettier_options }}
+        INPUT_DRY: ${{ inputs.dry }}
+        INPUT_PRETTIER_VERSION: ${{ inputs.prettier_version }}
+        INPUT_ONLY_CHANGED: ${{ inputs.only_changed }}
+        INPUT_PRETTIER_PLUGINS: ${{ inputs.prettier_plugins }}
 
 branding:
-  icon: 'award'
-  color: 'green'
+  icon: "award"
+  color: "green"
diff --git a/entrypoint.sh b/entrypoint.sh
index d884057..e6e313d 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -1,7 +1,8 @@
-#!/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
+shopt -s globstar nullglob
 
 # FUNCTIONS
 # Function for setting up git env in the docker container (copied from https://github.com/stefanzweifel/git-auto-commit-action/blob/master/entrypoint.sh)
@@ -25,31 +26,53 @@ _git_changed() {
     [[ -n "$(git status -s)" ]]
 }
 
+(
 # PROGRAM
+# Changing to the directory
+cd "$GITHUB_ACTION_PATH"
+
 echo "Installing prettier..."
 case $INPUT_PRETTIER_VERSION in
     false)
-        npm install --silent --global prettier
+        npm install --silent prettier
         ;;
     *)
-        npm install --silent --global prettier@$INPUT_PRETTIER_VERSION
+        npm install --silent prettier@$INPUT_PRETTIER_VERSION
         ;;
 esac
 
 # Install plugins
 if [ -n "$INPUT_PRETTIER_PLUGINS" ]; then
+    for plugin in $INPUT_PRETTIER_PLUGINS; do
+        echo "Checking plugin: $plugin"
+        # check regex against @prettier/xyz
+        if ! echo "$plugin" | grep -Eq '(@prettier\/)+(plugin-[a-z\-]+)'; then
+            echo "$plugin does not seem to be a valid @prettier/plugin-x plugin. Exiting."
+            exit 1
+        fi
+    done
     npm install --silent --global $INPUT_PRETTIER_PLUGINS
 fi
+)
 
-echo "Prettifing files..."
+PRETTIER_RESULT=0
+echo "Prettifying files..."
 echo "Files:"
-prettier $INPUT_PRETTIER_OPTIONS || echo "Problem running prettier with $INPUT_PRETTIER_OPTIONS"
+prettier $INPUT_PRETTIER_OPTIONS || { PRETTIER_RESULT=$?; echo "Problem running prettier with $INPUT_PRETTIER_OPTIONS"; }
+
+# Ignore node modules and other action created files
+rm -r node_modules/ || echo "No node_modules/ folder."
+git reset --hard package-lock.json || rm package-lock.json || echo "No package-lock.json file."
 
 # To keep runtime good, just continue if something was changed
 if _git_changed; then
   if $INPUT_DRY; then
-    echo "Prettier found unpretty files!"
-    exit 1
+    if [ "$PRETTIER_RESULT" -eq 1 ]; then
+      echo "Prettier found unpretty files!"
+      exit 1
+    else
+      echo "No unpretty files! Finishing dry-run."
+    fi
   else
     # Calling method to configure the git environemnt
     _git_setup