diff --git a/.github/workflows/nightly.yml b/.github/workflows/nightly.yml
index 0857e99ad..e4bc5d81c 100644
--- a/.github/workflows/nightly.yml
+++ b/.github/workflows/nightly.yml
@@ -50,8 +50,8 @@ jobs:
         run: |
           wget https://apt.llvm.org/llvm.sh
           chmod +x llvm.sh
-          sudo ./llvm.sh 17
-          echo "/usr/lib/llvm-17/bin" >> $GITHUB_PATH
+          sudo ./llvm.sh 18
+          echo "/usr/lib/llvm-18/bin" >> $GITHUB_PATH
       - name: build odin
         run: make nightly
       - name: Odin run
@@ -82,8 +82,8 @@ jobs:
       - uses: actions/checkout@v4
       - name: Download LLVM and setup PATH
         run: |
-          brew install llvm@17 dylibbundler
-          echo "/usr/local/opt/llvm@17/bin" >> $GITHUB_PATH
+          brew install llvm@18 dylibbundler
+          echo "/usr/local/opt/llvm@18/bin" >> $GITHUB_PATH
       - name: build odin
         # These -L makes the linker prioritize system libraries over LLVM libraries, this is mainly to
         # not link with libunwind bundled with LLVM but link with libunwind on the system.
@@ -116,8 +116,8 @@ jobs:
       - uses: actions/checkout@v4
       - name: Download LLVM and setup PATH
         run: |
-          brew install llvm@17 dylibbundler
-          echo "/opt/homebrew/opt/llvm@17/bin" >> $GITHUB_PATH
+          brew install llvm@18 dylibbundler
+          echo "/opt/homebrew/opt/llvm@18/bin" >> $GITHUB_PATH
       - name: build odin
         # These -L makes the linker prioritize system libraries over LLVM libraries, this is mainly to
         # not link with libunwind bundled with LLVM but link with libunwind on the system.