diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index 894e685b8..fe4128f0e 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -12,3 +12,6 @@ updates:
     schedule:
       # Check for updates to GitHub Actions every week
       interval: "weekly"
+    ignore:
+      - dependency-name: "benc-uk/workflow-dispatch"
+        versions: ["121"]  # presumably an upstream accident