diff --git a/.github/actions/fetch-vectors/action.yml b/.github/actions/fetch-vectors/action.yml
index e0a4f436439e..c1df58824014 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 18, 2024.
-        ref: "60f535528d1ad66fc939caef1a512e3e79036db8" # x509-limbo-ref
+        # Latest commit on the x509-limbo main branch, as of Jan 23, 2024.
+        ref: "cf66142f5c27b64c987c6f0aa4c10b8c9677b41c" # x509-limbo-ref