diff --git a/backend/cpp/ds4/Makefile b/backend/cpp/ds4/Makefile
index 4480fe835..64920f7f0 100644
--- a/backend/cpp/ds4/Makefile
+++ b/backend/cpp/ds4/Makefile
@@ -1,10 +1,10 @@
 # ds4 backend Makefile.
 #
-# Upstream pin lives below as DS4_VERSION?=512d07cb08f234b704b5a5959aa9e2d4c466eeb0
+# Upstream pin lives below as DS4_VERSION?=91bafb5acd5a6cf00b1e55ef68bf40ddd207bee7
 # (.github/bump_deps.sh) can find and update it - matches the
 # llama-cpp / ik-llama-cpp / turboquant convention.
 
-DS4_VERSION?=512d07cb08f234b704b5a5959aa9e2d4c466eeb0
+DS4_VERSION?=91bafb5acd5a6cf00b1e55ef68bf40ddd207bee7
 DS4_REPO?=https://github.com/antirez/ds4
 
 CURRENT_MAKEFILE_DIR := $(dir $(abspath $(lastword $(MAKEFILE_LIST))))