diff --git a/.github/actions/fetch-vectors/action.yml b/.github/actions/fetch-vectors/action.yml
index 7c6a186687d4..a19e54dcd2a0 100644
--- a/.github/actions/fetch-vectors/action.yml
+++ b/.github/actions/fetch-vectors/action.yml
@@ -16,5 +16,5 @@ runs:
       with:
         repository: "C2SP/x509-limbo"
         path: "x509-limbo"
-        # Latest commit on the x509-limbo main branch, as of Jan 21, 2025.
-        ref: "5aed9e55b0fd4e991e5edf89d52050f7554ea505" # x509-limbo-ref
+        # Latest commit on the x509-limbo main branch, as of Jan 22, 2025.
+        ref: "8423b985e8fcda09433bcc2f0d04d9f2c3f84722" # x509-limbo-ref