diff --git a/.github/workflows/scorecard.yml b/.github/workflows/scorecard.yml
index 166490e0..c729c4b3 100644
--- a/.github/workflows/scorecard.yml
+++ b/.github/workflows/scorecard.yml
@@ -1,4 +1,6 @@
 on:
+  # Allow manual runs from the Actions tab ("Run workflow" button).
+  workflow_dispatch:
   # For Branch-Protection check. Only the default branch is supported. See
   # https://github.com/ossf/scorecard/blob/main/docs/checks.md#branch-protection
   branch_protection_rule: