diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yml
similarity index 99%
rename from .github/workflows/ci.yaml
rename to .github/workflows/ci.yml
index 4c6e0e23df..070b820e0c 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yml
@@ -49,7 +49,7 @@ jobs:
               - "!crates/ruff_shrinking/**"
               - scripts/*
               - python/**
-              - .github/workflows/ci.yaml
+              - .github/workflows/ci.yml
 
             formatter:
               - Cargo.toml
@@ -65,7 +65,7 @@ jobs:
               - crates/ruff_dev/**
               - scripts/*
               - python/**
-              - .github/workflows/ci.yaml
+              - .github/workflows/ci.yml
 
             code:
               - "**/*"
@@ -374,7 +374,7 @@ jobs:
         uses: actions/cache@v3
         with:
           path: ~/.cache/pre-commit
-          key: pre-commit-${{ hashFiles('.pre-commit-config.yaml') }}
+          key: pre-commit-${{ hashFiles('.pre-commit-config.yml') }}
       - name: "Run pre-commit"
         run: |
           echo '```console' > $GITHUB_STEP_SUMMARY
diff --git a/.github/workflows/docs.yaml b/.github/workflows/docs.yml
similarity index 100%
rename from .github/workflows/docs.yaml
rename to .github/workflows/docs.yml
diff --git a/.github/workflows/playground.yaml b/.github/workflows/playground.yml
similarity index 100%
rename from .github/workflows/playground.yaml
rename to .github/workflows/playground.yml
diff --git a/.github/workflows/pr-comment.yaml b/.github/workflows/pr-comment.yml
similarity index 98%
rename from .github/workflows/pr-comment.yaml
rename to .github/workflows/pr-comment.yml
index 34fe20f50c..e026ca025f 100644
--- a/.github/workflows/pr-comment.yaml
+++ b/.github/workflows/pr-comment.yml
@@ -38,7 +38,7 @@ jobs:
         if: steps.pr-number.outputs.pr-number
         with:
           name: ecosystem-result
-          workflow: ci.yaml
+          workflow: ci.yml
           pr: ${{ steps.pr-number.outputs.pr-number }}
           path: pr/ecosystem
           workflow_conclusion: completed
diff --git a/.github/workflows/release.yaml b/.github/workflows/release.yml
similarity index 99%
rename from .github/workflows/release.yaml
rename to .github/workflows/release.yml
index f195b92a9b..983c75edd7 100644
--- a/.github/workflows/release.yaml
+++ b/.github/workflows/release.yml
@@ -15,7 +15,7 @@ on:
       # When we change pyproject.toml, we want to ensure that the maturin builds still work
       - pyproject.toml
       # And when we change this workflow itself...
-      - .github/workflows/release.yaml
+      - .github/workflows/release.yml
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
diff --git a/.markdownlint.yaml b/.markdownlint.yml
similarity index 100%
rename from .markdownlint.yaml
rename to .markdownlint.yml
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yml
similarity index 100%
rename from .pre-commit-config.yaml
rename to .pre-commit-config.yml
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 498b7be22a..9186ec22f5 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -329,7 +329,7 @@ We use an experimental in-house tool for managing releases.
 1. Run `cargo check`. This should update the lock file with new versions.
 1. Create a pull request with the changelog and version updates
 1. Merge the PR
-1. Run the [release workflow](https://github.com/astral-sh/ruff/actions/workflows/release.yaml) with:
+1. Run the [release workflow](https://github.com/astral-sh/ruff/actions/workflows/release.yml) with:
     - The new version number (without starting `v`)
     - The commit hash of the merged release pull request on `main`
 1. The release workflow will do the following:
diff --git a/docs/integrations.md b/docs/integrations.md
index 6cc40bb1cb..d3fa85269e 100644
--- a/docs/integrations.md
+++ b/docs/integrations.md
@@ -255,7 +255,7 @@ Ruff can also be integrated via
   <code>efm</code>
 </a>
 in just a
-<a href="https://github.com/JafarAbdi/myconfigs/blob/6f0b6b2450e92ec8fc50422928cd22005b919110/efm-langserver/config.yaml#L14-L20">
+<a href="https://github.com/JafarAbdi/myconfigs/blob/6f0b6b2450e92ec8fc50422928cd22005b919110/efm-langserver/config.yml#L14-L20">
   few lines.
 </a>
 </summary>