diff --git a/.github/actions/lint-jsonschema/action.yml b/.github/actions/lint-jsonschema/action.yml
index 1d52f9db..8cb37ff2 100644
--- a/.github/actions/lint-jsonschema/action.yml
+++ b/.github/actions/lint-jsonschema/action.yml
@@ -85,7 +85,7 @@ runs:
                 rc=1
               fi
             fi
-          done < <(grep -hoE 'link:[^\[]*|image::?[^\[]*|[a-z]*://[^\["[:space:]]*' "$(basename "$file")" | grep -v '^image:' | sed -E "s/^link:+//g")
+          done < <(grep -hoE 'link:[^\[]*|image::?[^\[]*|https?://[^\["[:space:]]*' "$(basename "$file")" | grep -v '^image:' | sed -E "s/^link:+//g")
 
           popd > /dev/null
         done < <(find . -type f -name "*.adoc")