diff --git a/.editorconfig b/.editorconfig
index 063f801..ae75558 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -10,3 +10,7 @@ indent_size = tab
 [*.{yaml,yml,cff}]
 indent_style = space
 indent_size = 2
+
+[*.md]
+indent_style = space
+indent_size = 3
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 06ad101..e7f824e 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -5,20 +5,31 @@
 # See https://pre-commit.com for more information
 # See https://pre-commit.com/hooks.html for more hooks
 repos:
--   repo: https://github.com/pre-commit/pre-commit-hooks
+  - repo: https://github.com/pre-commit/pre-commit-hooks
     rev: v4.4.0
     hooks:
-    -   id: check-case-conflict
-    -   id: check-executables-have-shebangs
-    -   id: check-shebang-scripts-are-executable
-    -   id: destroyed-symlinks
-    -   id: detect-private-key
-    -   id: fix-byte-order-marker
+      - id: check-case-conflict
+      - id: check-executables-have-shebangs
+      - id: check-shebang-scripts-are-executable
+      - id: destroyed-symlinks
+      - id: detect-private-key
+      - id: end-of-file-fixer
+      - id: fix-byte-order-marker
 
-- repo: https://github.com/python-jsonschema/check-jsonschema
-  rev: 0.21.0
-  hooks:
-  - id: check-dependabot
-  - id: check-github-actions
-  - id: check-github-workflows
-  - id: check-gitlab-ci
+  - repo: https://github.com/python-jsonschema/check-jsonschema
+    rev: 0.21.0
+    hooks:
+      - id: check-dependabot
+      - id: check-github-actions
+      - id: check-github-workflows
+      - id: check-gitlab-ci
+
+  - repo: https://github.com/pre-commit/mirrors-prettier
+    rev: "v3.0.0-alpha.4"
+    hooks:
+      - id: prettier
+  - repo: https://github.com/editorconfig-checker/editorconfig-checker.python
+    rev: "2.7.1"
+    hooks:
+      - id: editorconfig-checker
+        alias: ec
diff --git a/CITATION.cff b/CITATION.cff
index 5c5a2e2..d09870f 100644
--- a/CITATION.cff
+++ b/CITATION.cff
@@ -1,13 +1,13 @@
 cff-version: 1.2.0
 message: "If you use this, please cite it as below."
 authors:
-- family-names: "Suomalainen"
-  given-names: "Aminda"
+  - family-names: "Suomalainen"
+    given-names: "Aminda"
 title: "GitHub Community Health Files"
 url: "https://github.com/Mikaela/.github"
 preferred-citation:
   type: generic
   title: "GitHub Community Health Files"
   authors:
-  - family-names: "Suomalainen"
-    given-names: "Aminda"
+    - family-names: "Suomalainen"
+      given-names: "Aminda"
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 00252a0..2fcbb04 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -14,9 +14,9 @@ from GitHub or `git remote`s to use, the merge might just take a bit longer
 ## General steps
 
 1. In case [editorconfig](https://editorconfig.org/) isn't
-[natively supported by your editor of choice](https://editorconfig.org/#pre-installed),
-please consider [installing a plugin](https://editorconfig.org/#download).  
-E.g. VS Cod{e,ium} users can `CTRL-P` and execute `ext install EditorConfig.EditorConfig`.
+   [natively supported by your editor of choice](https://editorconfig.org/#pre-installed),
+   please consider [installing a plugin](https://editorconfig.org/#download).  
+   E.g. VS Cod{e,ium} users can `CTRL-P` and execute `ext install EditorConfig.EditorConfig`.
 2. If the repository in question has a `.pre-commit-config.yaml` file,
-please install [`pre-commit`](https://pre-commit.com/) and run
-`pre-commit install` in your local clone at least once.
+   please install [`pre-commit`](https://pre-commit.com/) and run
+   `pre-commit install` in your local clone at least once.
diff --git a/FUNDING.yml b/FUNDING.yml
index c658c09..d35483c 100644
--- a/FUNDING.yml
+++ b/FUNDING.yml
@@ -1,2 +1,6 @@
 # If no protocol is specified, http:// is assumed.
-custom: ["https://github.com/liberapay/liberapay.org/issues/30", "https://cv.aminda.eu"]
+custom:
+  [
+    "https://github.com/liberapay/liberapay.org/issues/30",
+    "https://cv.aminda.eu",
+  ]
diff --git a/README.md b/README.md
index fa4c536..091a2a9 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,3 @@
 GitHub community health files
 
-* https://docs.github.com/en/communities/setting-up-your-project-for-healthy-contributions/creating-a-default-community-health-file#creating-a-repository-for-default-files
+-  https://docs.github.com/en/communities/setting-up-your-project-for-healthy-contributions/creating-a-default-community-health-file#creating-a-repository-for-default-files