diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index fb6c6ea..acc0d92 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -10,7 +10,7 @@ jobs:
     runs-on: macos-latest
     strategy:
       matrix:
-        llvm: [14, 15, 16, 17]
+        llvm: [14, 15, 16, 17, 18]
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -18,23 +18,23 @@ jobs:
         uses: actions/setup-go@v5
         with:
           go-version: '1.22'
-      - name: Update Homebrew
-        if: matrix.llvm == 17 # needed as long as LLVM 17 is still fresh
-        run: brew update
+      #- name: Update Homebrew
+      #  if: matrix.llvm == 17 # needed as long as LLVM 17 is still fresh
+      #  run: brew update
       - name: Install LLVM
         run: HOMEBREW_NO_AUTO_UPDATE=1 brew install llvm@${{ matrix.llvm }}
       - name: Test LLVM ${{ matrix.llvm }}
         run:
           go test -v -tags=llvm${{ matrix.llvm }}
       - name: Test default LLVM
-        if: matrix.llvm == 17
+        if: matrix.llvm == 18
         run:
           go test -v
   test-linux:
     runs-on: ubuntu-20.04
     strategy:
       matrix:
-        llvm: [14, 15, 16, 17]
+        llvm: [14, 15, 16, 17, 18]
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -52,6 +52,6 @@ jobs:
         run:
           go test -v -tags=llvm${{ matrix.llvm }}
       - name: Test default LLVM
-        if: matrix.llvm == 17
+        if: matrix.llvm == 18
         run:
           go test -v
diff --git a/llvm_config_darwin_llvm17.go b/llvm_config_darwin_llvm17.go
index e1e6554..3dc8f26 100644
--- a/llvm_config_darwin_llvm17.go
+++ b/llvm_config_darwin_llvm17.go
@@ -1,4 +1,4 @@
-//go:build !byollvm && darwin && !llvm14 && !llvm15 && !llvm16
+//go:build !byollvm && darwin && llvm17
 
 package llvm
 
diff --git a/llvm_config_darwin_llvm18.go b/llvm_config_darwin_llvm18.go
new file mode 100644
index 0000000..2b16f03
--- /dev/null
+++ b/llvm_config_darwin_llvm18.go
@@ -0,0 +1,15 @@
+//go:build !byollvm && darwin && !llvm14 && !llvm15 && !llvm16 && !llvm17
+
+package llvm
+
+// Automatically generated by `make config BUILDDIR=`, do not edit.
+
+// #cgo amd64 CPPFLAGS: -I/usr/local/opt/llvm@18/include   -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
+// #cgo amd64 CXXFLAGS: -std=c++18
+// #cgo amd64 LDFLAGS: -L/usr/local/opt/llvm@18/lib -Wl,-search_paths_first -Wl,-headerpad_max_install_names -lLLVM -lz -lm
+// #cgo arm64 CPPFLAGS: -I/opt/homebrew/opt/llvm@18/include   -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
+// #cgo arm64 CXXFLAGS: -std=c++18
+// #cgo arm64 LDFLAGS: -L/opt/homebrew/opt/llvm@18/lib -Wl,-search_paths_first -Wl,-headerpad_max_install_names -lLLVM -lz -lm
+import "C"
+
+type run_build_sh int
diff --git a/llvm_config_linux_llvm17.go b/llvm_config_linux_llvm17.go
index 04405bf..f2951d7 100644
--- a/llvm_config_linux_llvm17.go
+++ b/llvm_config_linux_llvm17.go
@@ -1,4 +1,4 @@
-//go:build !byollvm && linux && !llvm14 && !llvm15 && !llvm16
+//go:build !byollvm && linux && llvm17
 
 package llvm
 
diff --git a/llvm_config_linux_llvm18.go b/llvm_config_linux_llvm18.go
new file mode 100644
index 0000000..8010f03
--- /dev/null
+++ b/llvm_config_linux_llvm18.go
@@ -0,0 +1,10 @@
+//go:build !byollvm && linux && !llvm14 && !llvm15 && !llvm16 && !llvm17
+
+package llvm
+
+// #cgo CPPFLAGS: -I/usr/include/llvm-18 -I/usr/include/llvm-c-18 -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
+// #cgo CXXFLAGS: -std=c++17
+// #cgo LDFLAGS: -L/usr/lib/llvm-18/lib  -lLLVM-18
+import "C"
+
+type run_build_sh int