diff --git a/.github/actions/setup_ubuntu_build/action.yml b/.github/actions/setup_ubuntu_build/action.yml
index 55dc998ae..dc3d90a57 100644
--- a/.github/actions/setup_ubuntu_build/action.yml
+++ b/.github/actions/setup_ubuntu_build/action.yml
@@ -6,8 +6,8 @@ inputs:
     description: 'llvm Build type (Release, RelAssert) - note we need to use RelAssert for the cache pattern matching'
     default: RelAssert
   llvm_version:
-    description: 'Major llvm version to use for fetching llvm cache e.g. 16'
-    default: 16
+    description: 'Major llvm version to use for fetching llvm cache e.g. 17'
+    default: 17
   ubuntu_version:
     description: 'Version of ubuntu used for cache retrieval'
     default: 22.04
diff --git a/.github/workflows/run_pr_tests.yml b/.github/workflows/run_pr_tests.yml
index bf9e5fc2d..45a9146f5 100644
--- a/.github/workflows/run_pr_tests.yml
+++ b/.github/workflows/run_pr_tests.yml
@@ -34,7 +34,7 @@ jobs:
       - name: setup-ubuntu
         uses:  ./.github/actions/setup_ubuntu_build
         with:
-          llvm_version: 16
+          llvm_version: 17
           llvm_build_type: RelAssert        
   
       # These need to match the configurations of build_pr_cache to use the cache effectively
@@ -78,7 +78,7 @@ jobs:
       - name: setup-ubuntu
         uses:  ./.github/actions/setup_ubuntu_build
         with:
-          llvm_version: 16
+          llvm_version: 17
           llvm_build_type: RelAssert
 
       - name: build riscv M1