diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f78d257bf0..3aac191450 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -108,7 +108,7 @@ jobs:
       - name: Check the links
         uses: lycheeverse/lychee-action@v1
         with:
-          args: --exclude "%7Busername%7D|file:///|https://datatracker.ietf.org" -v *.md
+          args: --exclude "%7Busername%7D|file:///|https://datatracker.ietf.org|protonmail" -v *.md
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}