diff --git a/.github/workflows/link-check.yml b/.github/workflows/link-check.yml
index c6e44911..19b1243d 100644
--- a/.github/workflows/link-check.yml
+++ b/.github/workflows/link-check.yml
@@ -35,7 +35,7 @@ jobs:
           # Exclude all links in the "Material" directory.
           args: >
             .
-            --exclude ['^https://jira\.hl7\.org', '^https://test.krankenhaus.de']
+            --exclude "^https://jira\.hl7\.org,^https://test.krankenhaus.de"
             --exclude-path ImplementationGuide/style
             --exclude-path Material