diff --git a/.github/workflows/release-docker-npu-nightly.yml b/.github/workflows/release-docker-npu-nightly.yml
index 5855fd729..0089f1d98 100644
--- a/.github/workflows/release-docker-npu-nightly.yml
+++ b/.github/workflows/release-docker-npu-nightly.yml
@@ -80,6 +80,6 @@ jobs:
           push: ${{ github.repository == 'sgl-project/sglang' && github.event_name != 'pull_request' }}
           provenance: false
           build-args: |
-            SGLANG_KERNEL_NPU_TAG=2026.9.0
+            SGLANG_KERNEL_NPU_TAG=2026.9.0.post4
             CANN_VERSION=${{ matrix.cann_version }}
             DEVICE_TYPE=${{ matrix.device_type }}
diff --git a/.github/workflows/release-docker-npu.yml b/.github/workflows/release-docker-npu.yml
index eaa13da93..0e8573d78 100644
--- a/.github/workflows/release-docker-npu.yml
+++ b/.github/workflows/release-docker-npu.yml
@@ -87,7 +87,7 @@ jobs:
           push: ${{ github.repository == 'sgl-project/sglang' && github.event_name != 'pull_request' }}
           provenance: false
           build-args: |
-            SGLANG_KERNEL_NPU_TAG=2026.9.0
+            SGLANG_KERNEL_NPU_TAG=2026.9.0.post4
             CANN_VERSION=${{ matrix.cann_version }}
             DEVICE_TYPE=${{ matrix.device_type }}
             SGLANG_TAG=${{ steps.version.outputs.version }}
diff --git a/scripts/ci/npu/npu_ci_install_dependency.sh b/scripts/ci/npu/npu_ci_install_dependency.sh
index 192530517..2186837b1 100755
--- a/scripts/ci/npu/npu_ci_install_dependency.sh
+++ b/scripts/ci/npu/npu_ci_install_dependency.sh
@@ -55,7 +55,7 @@ ${PIP_INSTALL} triton-ascend==3.2.1.dev20260530 --extra-index-url=https://mirror
 
 
 ### Install sgl-kernel-npu
-SGLANG_KERNEL_NPU_TAG="2026.9.0"
+SGLANG_KERNEL_NPU_TAG="2026.9.0.post4"
 mkdir sgl-kernel-npu
 (cd sgl-kernel-npu && wget "${GITHUB_PROXY_URL:=""}https://github.com/sgl-project/sgl-kernel-npu/releases/download/${SGLANG_KERNEL_NPU_TAG}/sgl-kernel-npu-${SGLANG_KERNEL_NPU_TAG}-torch${PYTORCH_VERSION}-py311-cann9.0.0-${DEVICE_TYPE}-$(arch).zip" \
 && unzip ./sgl-kernel-npu-${SGLANG_KERNEL_NPU_TAG}-torch${PYTORCH_VERSION}-py311-cann9.0.0-${DEVICE_TYPE}-$(arch).zip \