diff --git a/.github/workflows/c-cpp.yml b/.github/workflows/c-cpp.yml
deleted file mode 100644
index 4418c935..00000000
--- a/.github/workflows/c-cpp.yml
+++ /dev/null
@@ -1,34 +0,0 @@
-name: Linux
-
-on: [push, pull_request]
-
-jobs:
-  build:
-
-    runs-on: ubuntu-20.04
-
-    steps:
-    - uses: actions/checkout@v1
-
-    - name: 下载submodule源码
-      run: mv -f .gitmodules_github .gitmodules && git submodule sync && git submodule update --init
-
-    - name: apt-get安装依赖库(非必选)
-      run: sudo apt-get update && sudo apt-get install -y cmake libssl-dev libsdl-dev libavcodec-dev libavutil-dev libswscale-dev libresample-dev libusrsctp-dev
-
-    - name: 下载 SRTP
-      uses: actions/checkout@v2
-      with:
-        repository: cisco/libsrtp
-        fetch-depth: 1
-        ref: v2.3.0
-        path: 3rdpart/libsrtp
-
-    - name: 编译 SRTP
-      run: cd 3rdpart/libsrtp && ./configure --enable-openssl && make -j4 && sudo make install
-
-    - name: 编译
-      run: mkdir -p linux_build && cd linux_build && cmake .. -DENABLE_WEBRTC=true -DENABLE_FFMPEG=true && make -j $(nproc)
-
-    - name: 运行MediaServer
-      run: pwd && cd release/linux/Debug && sudo ./MediaServer -d &
diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
index c18493ac..81c002c9 100644
--- a/.github/workflows/docker.yml
+++ b/.github/workflows/docker.yml
@@ -40,9 +40,7 @@ jobs:
       # https://github.com/sigstore/cosign-installer
       - name: Install cosign
         if: github.event_name != 'pull_request'
-        uses: sigstore/cosign-installer@d6a3abf1bdea83574e28d40543793018b6035605
-        with:
-          cosign-release: 'v1.7.1'
+        uses: sigstore/cosign-installer@d572c9c13673d2e0a26fabf90b5748f36886883f
 
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v2