diff --git a/.github/workflows/ci-cpp.yml b/.github/workflows/ci-cpp.yml
index b465fd1dc..279e1136d 100644
--- a/.github/workflows/ci-cpp.yml
+++ b/.github/workflows/ci-cpp.yml
@@ -63,14 +63,14 @@ jobs:
         uses: actions/cache@v4
         with:
           path: /home/runner/work/spice/llvm
-          key: llvm-18.1.4
+          key: llvm-18.1.5
 
       - name: Setup LLVM
         if: steps.cache-llvm.outputs.cache-hit != 'true'
         run: |
           cd ..
           rm -rf llvm
-          git clone --depth 1 --branch llvmorg-18.1.4 https://github.com/llvm/llvm-project llvm
+          git clone --depth 1 --branch llvmorg-18.1.5 https://github.com/llvm/llvm-project llvm
           mkdir ./llvm/build
           cd ./llvm/build
           cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_C_COMPILER_LAUNCHER=ccache -DCMAKE_CXX_COMPILER_LAUNCHER=ccache -DCMAKE_C_COMPILER=gcc -DCMAKE_CXX_COMPILER=g++ -DCMAKE_CXX_FLAGS_RELEASE="-O2" -DLLVM_ENABLE_RTTI=ON -GNinja ../llvm
diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index 4695bb181..fa4bdc70b 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -46,14 +46,14 @@ jobs:
         uses: actions/cache@v4
         with:
           path: /home/runner/work/spice/llvm
-          key: llvm-18.1.4
+          key: llvm-18.1.5
 
       - name: Setup LLVM
         if: steps.cache-llvm.outputs.cache-hit != 'true'
         run: |
           echo "/usr/lib/ccache:/usr/local/opt/ccache/libexec" >> $GITHUB_PATH
           cd ..
-          git clone --depth 1 --branch llvmorg-18.1.4 https://github.com/llvm/llvm-project llvm
+          git clone --depth 1 --branch llvmorg-18.1.5 https://github.com/llvm/llvm-project llvm
           mkdir ./llvm/build
           cd ./llvm/build
           cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_C_COMPILER_LAUNCHER=ccache -DCMAKE_CXX_COMPILER_LAUNCHER=ccache -DCMAKE_C_COMPILER=gcc -DCMAKE_CXX_COMPILER=g++ -DCMAKE_CXX_FLAGS_RELEASE="-O2" -DLLVM_ENABLE_RTTI=ON -GNinja ../llvm
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 70c0b7301..103163c87 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -42,12 +42,12 @@ jobs:
         uses: actions/cache@v4
         with:
           path: /home/runner/work/spice/spice/llvm
-          key: llvm-18.1.4-linux-x64
+          key: llvm-18.1.5-linux-x64
 
       - name: Setup LLVM
         if: steps.cache-llvm.outputs.cache-hit != 'true'
         run: |
-          git clone --depth 1 --branch llvmorg-18.1.4 https://github.com/llvm/llvm-project.git llvm
+          git clone --depth 1 --branch llvmorg-18.1.5 https://github.com/llvm/llvm-project.git llvm
           mkdir ./llvm/build
           cd ./llvm/build
           cmake -GNinja -DCMAKE_BUILD_TYPE=Release -DCMAKE_C_COMPILER_LAUNCHER=ccache -DCMAKE_CXX_COMPILER_LAUNCHER=ccache -DCMAKE_C_COMPILER=gcc -DCMAKE_CXX_COMPILER=g++ -DCMAKE_CXX_FLAGS_RELEASE="-O2" -DLLVM_ENABLE_RTTI=ON -Wno-dev -Wattributes ../llvm
@@ -109,12 +109,12 @@ jobs:
         uses: actions/cache@v4
         with:
           path: /home/runner/work/spice/spice/llvm
-          key: llvm-18.1.4-linux-aarch64
+          key: llvm-18.1.5-linux-aarch64
 
       - name: Clone LLVM
         if: steps.cache-llvm.outputs.cache-hit != 'true'
         run: |
-          git clone --depth 1 --branch llvmorg-18.1.4 https://github.com/llvm/llvm-project.git llvm
+          git clone --depth 1 --branch llvmorg-18.1.5 https://github.com/llvm/llvm-project.git llvm
           mkdir ./llvm/build
 
       - name: Setup LLVM
@@ -187,7 +187,7 @@ jobs:
         uses: actions/cache@v4
         with:
           path: D:/a/spice/spice/llvm
-          key: llvm-18.1.4-win-x64
+          key: llvm-18.1.5-win-x64
 
       - name: Setup LLVM
         if: steps.cache-llvm.outputs.cache-hit != 'true'
diff --git a/dev-setup.bat b/dev-setup.bat
index 24896ba30..820a94aa9 100644
--- a/dev-setup.bat
+++ b/dev-setup.bat
@@ -34,7 +34,7 @@ echo done.
 
 :: Clone LLVM
 echo [Step 2] Cloning LLVM (Could take a while) ...
-git clone --depth 1 --branch llvmorg-18.1.4 https://github.com/llvm/llvm-project llvm
+git clone --depth 1 --branch llvmorg-18.1.5 https://github.com/llvm/llvm-project llvm
 echo done.
 
 :: Build LLVM
diff --git a/dev-setup.sh b/dev-setup.sh
index 98390cd31..f8d54ab24 100755
--- a/dev-setup.sh
+++ b/dev-setup.sh
@@ -16,7 +16,7 @@ colored_echo "done."
 
 # Clone LLVM
 colored_echo "[Step 2] Cloning LLVM (Could take a while) ... "
-git clone --depth 1 --branch llvmorg-18.1.4 https://github.com/llvm/llvm-project llvm
+git clone --depth 1 --branch llvmorg-18.1.5 https://github.com/llvm/llvm-project llvm
 colored_echo "done."
 
 # Build LLVM