diff --git a/action.yml b/action.yml
index b7c8020..8ad69c1 100644
--- a/action.yml
+++ b/action.yml
@@ -1,71 +1,71 @@
-name: "TODO to Issue"
-description: "Converts IDE TODO comments to GitHub issues"
-author: "Alastair Mooney"
+name: 'TODO to Issue'
+description: 'Converts IDE TODO comments to GitHub issues'
+author: 'Alastair Mooney'
 runs:
-  using: "docker"
-  image: "docker://ghcr.io/alstr/todo-to-issue-action:v4.6"
+  using: 'docker'
+  image: 'Dockerfile'
 branding:
-  icon: "check-square"
-  color: "orange"
+  icon: 'check-square'
+  color: 'orange'
 inputs:
   REPO:
     description: "The path to the repository where the action will be used, e.g. 'alstr/my-repo' (automatically set)"
     required: true
-    default: "${{ github.repository }}"
+    default: '${{ github.repository }}'
   BEFORE:
-    description: "The SHA of the last pushed commit (automatically set)"
+    description: 'The SHA of the last pushed commit (automatically set)'
     required: true
-    default: "${{ github.event.before || github.base_ref }}"
+    default: '${{ github.event.before || github.base_ref }}'
   COMMITS:
-    description: "An array of commit objects describing the pushed commits"
+    description: 'An array of commit objects describing the pushed commits'
     required: true
-    default: "${{ toJSON(github.event.commits) }}"
+    default: '${{ toJSON(github.event.commits) }}'
   DIFF_URL:
-    description: "The URL to use to get the diff (automatically set)"
+    description: 'The URL to use to get the diff (automatically set)'
     required: true
-    default: "${{ github.event.pull_request.diff_url }}"
+    default: '${{ github.event.pull_request.diff_url }}'
   SHA:
-    description: "The SHA of the latest commit (automatically set)"
+    description: 'The SHA of the latest commit (automatically set)'
     required: true
-    default: "${{ github.sha }}"
+    default: '${{ github.sha }}'
   TOKEN:
-    description: "The GitHub access token to allow us to retrieve, create and update issues (automatically set)"
+    description: 'The GitHub access token to allow us to retrieve, create and update issues (automatically set)'
     required: false
     default: ${{ github.token }}
   LABEL:
-    description: "The label that will be used to identify TODO comments (deprecated)"
+    description: 'The label that will be used to identify TODO comments (deprecated)'
     required: false
   COMMENT_MARKER:
-    description: "The marker used to signify a line comment in your code (deprecated)"
+    description: 'The marker used to signify a line comment in your code (deprecated)'
     required: false
   CLOSE_ISSUES:
-    description: "Optional input that specifies whether to attempt to close an issue when a TODO is removed"
+    description: 'Optional input that specifies whether to attempt to close an issue when a TODO is removed'
     required: true
     default: true
   AUTO_P:
-    description: "For multiline TODOs, format each line as a new paragraph when creating the issue"
+    description: 'For multiline TODOs, format each line as a new paragraph when creating the issue'
     required: true
     default: true
   PROJECTS_SECRET:
-    description: "Encrypted secret corresponding to your personal access token (do not enter the actual secret)"
+    description: 'Encrypted secret corresponding to your personal access token (do not enter the actual secret)'
     required: false
   USER_PROJECTS:
-    description: "Default user projects"
+    description: 'Default user projects'
     required: false
   ORG_PROJECTS:
-    description: "Default organisation projects"
+    description: 'Default organisation projects'
     required: false
   IGNORE:
-    description: "A collection of comma-delimited regular expression that matches files that should be ignored when searching for TODOs"
+    description: 'A collection of comma-delimited regular expression that matches files that should be ignored when searching for TODOs'
     required: false
   AUTO_ASSIGN:
-    description: "Automatically assign new issues to the user who triggered the action"
+    description: 'Automatically assign new issues to the user who triggered the action'
     required: true
     default: false
   ACTOR:
-    description: "The username of the person who triggered the action"
+    description: 'The username of the person who triggered the action'
     required: true
-    default: "${{ github.actor }}"
+    default: '${{ github.actor }}'
   ISSUE_TEMPLATE:
-    description: "The template used to format new issues"
+    description: 'The template used to format new issues'
     required: false
diff --git a/tests/test_todo_parser.py b/tests/test_todo_parser.py
index c3c0c09..17963cf 100644
--- a/tests/test_todo_parser.py
+++ b/tests/test_todo_parser.py
@@ -65,7 +65,7 @@ class NewIssueTests(unittest.TestCase):
         self.assertEqual(count_issues_for_file_type(self.raw_issues, 'twig'), 2)
 
     def test_md_issues(self):
-        self.assertEqual(count_issues_for_file_type(self.raw_issues, 'md'), 2)
+        self.assertEqual(count_issues_for_file_type(self.raw_issues, 'markdown'), 2)
 
 
 class ClosedIssueTests(unittest.TestCase):
@@ -121,7 +121,7 @@ class ClosedIssueTests(unittest.TestCase):
         self.assertEqual(count_issues_for_file_type(self.raw_issues, 'twig'), 2)
 
     def test_md_issues(self):
-        self.assertEqual(count_issues_for_file_type(self.raw_issues, 'md'), 2)
+        self.assertEqual(count_issues_for_file_type(self.raw_issues, 'markdown'), 2)
 
 
 class IgnorePatternTests(unittest.TestCase):