diff --git a/.github/workflows/build_flang.yml b/.github/workflows/build_flang.yml
index 82bdd6d3ae5..56d30f2f9e0 100644
--- a/.github/workflows/build_flang.yml
+++ b/.github/workflows/build_flang.yml
@@ -22,16 +22,16 @@ jobs:
         target: [X86]
         cc: [clang]
         version: [14, 15]
-        llvm_branch: [release_16x, release_17x]
+        llvm_branch: [release_17x, release_18x]
         include:
           - target: X86
             cc: gcc
             version: 12
-            llvm_branch: release_16x
+            llvm_branch: release_17x
           - target: X86
             cc: gcc
             version: 12
-            llvm_branch: release_17x
+            llvm_branch: release_18x
 
     steps:
       # Checks-out your repository under $GITHUB_WORKSPACE, so the job can access it
diff --git a/.github/workflows/build_flang_arm64.yml b/.github/workflows/build_flang_arm64.yml
index c10046a495d..22a4853f79d 100644
--- a/.github/workflows/build_flang_arm64.yml
+++ b/.github/workflows/build_flang_arm64.yml
@@ -26,7 +26,7 @@ jobs:
     strategy:
       matrix:
         target: [AArch64]
-        llvm_branch: [release_16x, release_17x]
+        llvm_branch: [release_17x, release_18x]
 
     steps:
       - name: Check tools
diff --git a/.github/workflows/build_flang_windows.yml b/.github/workflows/build_flang_windows.yml
index a74ef4b73fa..b58a9436003 100644
--- a/.github/workflows/build_flang_windows.yml
+++ b/.github/workflows/build_flang_windows.yml
@@ -20,7 +20,7 @@ jobs:
         os:
           - windows-latest
           # - self-hosted
-        llvm_branch: [release_16x, release_17x]
+        llvm_branch: [release_17x, release_18x]
         include:
           - os: windows-latest
             arch: amd64