diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index 8778a7d..79b8f42 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -17,10 +17,10 @@ jobs:
     runs-on: ${{ matrix.platform }}
     steps:
       - name: Install LLVM and Clang # required for bindgen to work, see https://github.com/rust-lang/rust-bindgen/issues/1797
-        uses: KyleMayes/install-llvm-action@v2
+        uses: KyleMayes/install-llvm-action@v2.0.8
         if: matrix.platform == 'windows-latest'
         with:
-          version: 20.1.8
+          version: 21.1.3
           directory: ${{ runner.temp }}/llvm
       - name: Set LIBCLANG_PATH
         run: echo "LIBCLANG_PATH=$((gcm clang).source -replace "clang.exe")" >> $env:GITHUB_ENV
diff --git a/src/lib.rs b/src/lib.rs
index 88281f2..8d8080a 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -70,7 +70,7 @@ mod bindings {
         pub type c_ushort = ::std::os::raw::c_ushort;
         pub type c_uint = ::std::os::raw::c_uint;
         pub type c_int = ::std::os::raw::c_int;
-        pub type c_ulong = ::std::os::raw::c_ulong;
+        pub type c_ulong = usize;
     }
     include!(concat!(env!("OUT_DIR"), "/bindings.rs"));
 }