diff --git a/.github/ISSUE_TEMPLATE.md b/.github/ISSUE_TEMPLATE.md
index 27e1ac56..d4936aa6 100644
--- a/.github/ISSUE_TEMPLATE.md
+++ b/.github/ISSUE_TEMPLATE.md
@@ -2,14 +2,14 @@
 title: ''
 ---
 
-### Expected behaviour
+## Expected behaviour
 
 <!-- Explain what you expected to happen. -->
 
-### Actual behaviour
+## Actual behaviour
 
 <!-- Explain what actually happened. If an exception occurred, please include a stack trace if available. -->
 
-### Steps to reproduce
+## Steps to reproduce
 
 <!-- A concise, repeatable, example of how to illustrate the issue. -->
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index a24cbc51..ba77cf1a 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -59,7 +59,7 @@ jobs:
         version: ${{ env.ZIZMOR_VERSION }}
 
     - name: Lint markdown
-      uses: DavidAnson/markdownlint-cli2-action@992badcdf24e3b8eb7e87ff9287fe931bcb00c6e # v20.0.0
+      uses: DavidAnson/markdownlint-cli2-action@30a0e04f1870d58f8d717450cc6134995f993c63 # v21.0.0
       with:
         config: '.markdownlint.json'
         globs: |