diff --git a/ci/vars.yml b/ci/vars.yml
index bbbab039..40708f74 100644
--- a/ci/vars.yml
+++ b/ci/vars.yml
@@ -12,4 +12,4 @@ variables:
   RISCV_COMPLIANCE_GIT_VERSION: "844c6660ef3f0d9b96957991109dfd80cc4938e2"
   VERIBLE_VERSION: "v0.0-1213-g9e5c085"
   # lowRISC-internal version numbers of Ibex-specific Spike builds.
-  SPIKE_IBEX_VERSION: "20201023-git-255bf1cacc599b1413438c269100f3ecd0eb3352"
+  SPIKE_IBEX_VERSION: "20211027-git-ec461195803d0a8a72c90d52dbb38ad24ac7c55d"