diff --git a/.github/workflows/build-llvm-nightly.yml b/.github/workflows/build-llvm-nightly.yml
index 5e271e26..845a02c2 100644
--- a/.github/workflows/build-llvm-nightly.yml
+++ b/.github/workflows/build-llvm-nightly.yml
@@ -35,10 +35,8 @@ jobs:
       - run: nproc
       - run: ${{ env.RETRY }} wget https://apt.llvm.org/llvm.sh
       - run: chmod +x llvm.sh
-      - run: ${{ env.RETRY }} ./llvm.sh 22
-      - run: ${{ env.RETRY }} apt-get install -y bolt-22 clang-22 libclang-common-22-dev libclang-22-dev mlir-22-tools llvm-22-tools libclang-common-22-dev libclang-22-dev libclang1-22 clang-format-22 python3-clang-22 clangd-22 clang-tidy-22 libomp-22-dev
-      # TODO: remove in the future
-      - run: touch /usr/lib/llvm-22/lib/libLibcTableGenUtil.a
+      - run: ./llvm.sh 23
+      - run: apt-get install -y bolt-23 clang-23 libclang-common-23-dev libclang-23-dev mlir-23-tools llvm-23-tools libclang-common-23-dev libclang-23-dev libclang1-23 clang-format-23 python3-clang-23 clangd-23 clang-tidy-23 libomp-23-dev
       - uses: actions/checkout@v6
       - run: mkdir objdir
       - run: cmake .. -DCMAKE_EXE_LINKER_FLAGS="-fuse-ld=mold" -DCMAKE_SHARED_LINKER_FLAGS="-fuse-ld=mold"
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 079fdb85..a9065857 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -23,17 +23,17 @@ jobs:
     strategy:
       matrix:
         # Note: when changing the versions below, update INSTALL.md as well.
-        llvm: [18, 19, 20, 21]
+        llvm: [18, 19, 20, 21, 22]
         build-type: [DEBUG]
         include:
-          - llvm: 21
+          - llvm: 22
             build-type: ASAN
-          - llvm: 21
+          - llvm: 22
             build-type: UBSAN
-          - llvm: 21
+          - llvm: 22
             build-type: RelWithDebInfo
             extra-flags: -flto=auto
-          - llvm: 21
+          - llvm: 22
             build-type: RelWithDebInfo
             env: CC=clang CXX=clang++
       fail-fast: false
diff --git a/INSTALL.md b/INSTALL.md
index ab5c3cfa..c8441bf3 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -80,7 +80,7 @@ manager:
   all you need).  For example, the openSUSE Tumbleweed provides them
   by `llvm-devel` and `clang-devel` packages.
 
-  Tested LLVM versions: ``18.0.0`` - ``22.0.0``
+  Tested LLVM versions: ``18.0.0`` - ``23.0.0``
 
 * [Python 3.10+](https://www.python.org/downloads/)