diff --git a/backend/cpp/bonsai/Makefile b/backend/cpp/bonsai/Makefile
index a3fe83f97..90f00e501 100644
--- a/backend/cpp/bonsai/Makefile
+++ b/backend/cpp/bonsai/Makefile
@@ -1,7 +1,7 @@
 
 # Pinned to the HEAD of the `prism` branch on https://github.com/PrismML-Eng/llama.cpp.
 # Auto-bumped nightly by .github/workflows/bump_deps.yaml.
-BONSAI_VERSION?=c96baf4abe24d11a50f326e40b6223b687449d63
+BONSAI_VERSION?=9d9efeadbdd1d77458d98717a96fbfa3a016e159
 LLAMA_REPO?=https://github.com/PrismML-Eng/llama.cpp
 
 CMAKE_ARGS?=