diff --git a/ci/vars.env b/ci/vars.env
index 0d1715d739..ce9af8dfc7 100644
--- a/ci/vars.env
+++ b/ci/vars.env
@@ -6,7 +6,7 @@
 # Quote values to ensure they are parsed as string (version numbers might
 # end up as float otherwise).
 VERILATOR_VERSION=v4.210
-IBEX_COSIM_VERSION=15fbd568
+IBEX_COSIM_VERSION=39612f9
 RISCV_TOOLCHAIN_TAR_VERSION=20220210-1
 RISCV_TOOLCHAIN_TAR_VARIANT=lowrisc-toolchain-gcc-rv32imcb
 RISCV_COMPLIANCE_GIT_VERSION=844c6660ef3f0d9b96957991109dfd80cc4938e2
diff --git a/ci/vars.yml b/ci/vars.yml
index d5f226ef68..a91d9e0874 100644
--- a/ci/vars.yml
+++ b/ci/vars.yml
@@ -7,7 +7,7 @@
 # end up as float otherwise).
 variables:
   VERILATOR_VERSION: "v4.210"
-  IBEX_COSIM_VERSION: "15fbd568"
+  IBEX_COSIM_VERSION: "39612f9"
   RISCV_TOOLCHAIN_TAR_VERSION: "20220210-1"
   RISCV_TOOLCHAIN_TAR_VARIANT: "lowrisc-toolchain-gcc-rv32imcb"
   RISCV_COMPLIANCE_GIT_VERSION: "844c6660ef3f0d9b96957991109dfd80cc4938e2"