diff --git a/Dockerfile b/Dockerfile
index efdf6b2..5d5a6f9 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,6 @@
-FROM ubuntu:18.04
-
-RUN apt-get update && apt-get install -y git
+FROM alpine/git
 
 COPY entrypoint.sh /entrypoint.sh
+RUN  chmod +x /entrypoint.sh
 
 ENTRYPOINT ["/entrypoint.sh"]
diff --git a/README.md b/README.md
index aa62462..69781ca 100644
--- a/README.md
+++ b/README.md
@@ -1,13 +1,13 @@
 # Reset Git Branch
 
-Reset a specific branch to another. Useful if you need a specific branch to be reset to say master at given intervals. NOTE: this action performs a _reset_ on the repository and is **destructive** - you will lose any changes made to the branch being reset. Be sure this is what you want to do before running.
+Reset a specific branch to another. Useful if you need a specific branch to be reset to say main at given intervals. NOTE: this action performs a _reset_ on the repository and is **destructive** - you will lose any changes made to the branch being reset. Be sure this is what you want to do before running.
 
 ## Usage
 
 Example Workflow using a schedule.
 
 ```yaml
-name: Rest Dev Branch to Master at 1am each day
+name: Rest Dev Branch to Main at 1am each day
 on:
   schedule:
     - cron: "0 1 * * *"
@@ -16,8 +16,8 @@ jobs:
     name: Runner
     runs-on: ubuntu-latest
     steps:
-      - name: Reset dev branch to master
-        uses: nicksnell/action-reset-repo@master
+      - name: Reset dev branch to main
+        uses: nicksnell/action-reset-repo@main
         with:
           reset_branch: dev
 ```
@@ -27,7 +27,7 @@ jobs:
 | name | value | default | description |
 | ---- | ----- | ------- | ----------- |
 | github_token | string | | Token for the repo. Can be passed in using `${{ secrets.GITHUB_TOKEN }}`. |
-| base_branch | string | 'master' | Branch to be used to reset too |
+| base_branch | string | 'main' | Branch to be used to reset too |
 | reset_branch | string | - | Determines the branch to be reset |
 
 ## License
diff --git a/action.yml b/action.yml
index 733e0ad..c3f80db 100644
--- a/action.yml
+++ b/action.yml
@@ -8,7 +8,7 @@ inputs:
   base_branch:
     description: "Branch you want to use as the base to reset too"
     required: true
-    default: "master"
+    default: "main"
   reset_branch:
     description: "Branch you want to reset"
     required: true
diff --git a/entrypoint.sh b/entrypoint.sh
index d05d485..9a3b691 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -1,4 +1,4 @@
-#!/bin/bash -l
+#!/bin/sh
 
 BASE_BRANCH=$1
 RESET_BRANCH=$2
@@ -18,7 +18,7 @@ echo "BASE_BRANCH=${BASE_BRANCH}"
 echo "RESET_BRANCH=${RESET_BRANCH}"
 
 
-mkdir _tmp && cd _tmp
+mkdir -p /tmp/_tmp && cd /tmp/_tmp
 
 git init