diff --git a/.github/workflows/danger.yml b/.github/workflows/danger.yml
new file mode 100644
index 00000000..d833c364
--- /dev/null
+++ b/.github/workflows/danger.yml
@@ -0,0 +1,21 @@
+name: Danger
+on:
+  workflow_dispatch:
+  pull_request:
+    types: [synchronize, edited, opened, reopened]
+jobs:
+  run:
+    name: Run danger checks
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+      with:
+        fetch-depth: 100
+        submodules: 'recursive'
+    - name: Install danger
+      run: |
+        sudo gem install danger
+    - name: Run danger
+      env:
+        DANGER_GITHUB_API_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      run: danger
diff --git a/Dangerfile b/Dangerfile
new file mode 100644
index 00000000..5e637670
--- /dev/null
+++ b/Dangerfile
@@ -0,0 +1,12 @@
+def changelog_was_not_updated?
+  !git.modified_files.include? "CHANGELOG.md"
+end
+
+def complicated?
+  !github.pr_body.include? "#trivial"
+end
+
+if changelog_was_not_updated? && complicated?
+  fail "You need to update the changelog. Your pull request will not be merged until this is done."
+  markdown "ProTip: Even if you think something is super simple, it should be in the changelog. Literally the only exception to this rule is if your commit isn't touching code."
+end