diff --git a/.github/actions/fetch-vectors/action.yml b/.github/actions/fetch-vectors/action.yml
index 007d6404d648..ed335bad876f 100644
--- a/.github/actions/fetch-vectors/action.yml
+++ b/.github/actions/fetch-vectors/action.yml
@@ -17,4 +17,4 @@ runs:
         repository: "C2SP/x509-limbo"
         path: "x509-limbo"
         # Latest commit on the x509-limbo main branch, as of Mar 11, 2024.
-        ref: "1bf45ad24ef5d2c0d7bc5082a9c690998cb595da" # x509-limbo-ref
+        ref: "b64509b2ce6d788667220b2509be559ee1a72dfe" # x509-limbo-ref