diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 71b237b..6079099 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -21,24 +21,24 @@ jobs:
     - name: update llvm
       if: matrix.os == 'macos'
       run: |
-        brew install llvm@18
-        brew link --overwrite llvm@18
-        echo "CC=$(brew --prefix llvm@18)/bin/clang" >> $GITHUB_ENV
-        echo "CXX=$(brew --prefix llvm@18)/bin/clang++" >> $GITHUB_ENV
-        echo "LDFLAGS=-L$(brew --prefix llvm@18)/lib" >> $GITHUB_ENV
-        echo "CPPFLAGS=-I$(brew --prefix llvm@18)/include" >> $GITHUB_ENV
-        echo "PATH=$(brew --prefix llvm@18)/bin:$PATH" >> $GITHUB_ENV
-        echo "LD_LIBRARY_PATH=$(brew --prefix llvm@18)/lib:$LD_LIBRARY_PATH" >> $GITHUB_ENV
-        echo "PKG_CONFIG_PATH=$(brew --prefix llvm@18)/lib/pkgconfig:$PKG_CONFIG_PATH" >> $GITHUB_ENV
-        echo "CMAKE_PREFIX_PATH=$(brew --prefix llvm@18):$CMAKE_PREFIX_PATH" >> $GITHUB_ENV
-        echo "LLVM_CONFIG_PATH=$(brew --prefix llvm@18)/bin/llvm-config" >> $GITHUB_ENV
-        echo "LLVM_BIN_PATH=$(brew --prefix llvm@18)/bin" >> $GITHUB_ENV
+        brew install llvm@19
+        brew link --overwrite llvm@19
+        echo "CC=$(brew --prefix llvm@19)/bin/clang" >> $GITHUB_ENV
+        echo "CXX=$(brew --prefix llvm@19)/bin/clang++" >> $GITHUB_ENV
+        echo "LDFLAGS=-L$(brew --prefix llvm@19)/lib" >> $GITHUB_ENV
+        echo "CPPFLAGS=-I$(brew --prefix llvm@19)/include" >> $GITHUB_ENV
+        echo "PATH=$(brew --prefix llvm@19)/bin:$PATH" >> $GITHUB_ENV
+        echo "LD_LIBRARY_PATH=$(brew --prefix llvm@19)/lib:$LD_LIBRARY_PATH" >> $GITHUB_ENV
+        echo "PKG_CONFIG_PATH=$(brew --prefix llvm@19)/lib/pkgconfig:$PKG_CONFIG_PATH" >> $GITHUB_ENV
+        echo "CMAKE_PREFIX_PATH=$(brew --prefix llvm@19):$CMAKE_PREFIX_PATH" >> $GITHUB_ENV
+        echo "LLVM_CONFIG_PATH=$(brew --prefix llvm@19)/bin/llvm-config" >> $GITHUB_ENV
+        echo "LLVM_BIN_PATH=$(brew --prefix llvm@19)/bin" >> $GITHUB_ENV
     - name: Checkout Code
       uses: actions/checkout@v4
       with:
         submodules: recursive
-    - name: Setup tmate session
-      uses: mxschmitt/action-tmate@v3
+    # - name: Setup tmate session
+    #   uses: mxschmitt/action-tmate@v3
     - name: Build msquic
       run: ./scripts/msquic.sh
     - name: Compress build output