diff --git a/Dockerfile.mxfp4 b/Dockerfile.mxfp4
index 1902e32..e00184f 100644
--- a/Dockerfile.mxfp4
+++ b/Dockerfile.mxfp4
@@ -175,7 +175,9 @@ RUN --mount=type=cache,id=repo-cache,target=/repo-cache \
     # 2. Logic: Clone if missing, otherwise Fetch & Reset
     if [ ! -d "vllm-mxfp4" ]; then \
         echo "Cache miss: Cloning vLLM from scratch..." && \
-        git clone --recursive ${VLLM_REPO} vllm-mxfp4; \
+        git clone --recursive ${VLLM_REPO} vllm-mxfp4 && \
+        cd vllm-mxfp4 && \
+        git checkout ${VLLM_SHA} ; \
     else \
         echo "Cache hit: Fetching updates..." && \
         cd vllm-mxfp4 && \
diff --git a/build-and-copy.sh b/build-and-copy.sh
index 2030909..0b45eb2 100755
--- a/build-and-copy.sh
+++ b/build-and-copy.sh
@@ -11,7 +11,7 @@ REBUILD_VLLM=false
 COPY_HOSTS=()
 SSH_USER="$USER"
 NO_BUILD=false
-TRITON_REF="v3.6.0"
+TRITON_REF="v3.5.1"
 VLLM_REF="main"
 TMP_IMAGE=""
 PARALLEL_COPY=false