diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 07e74d7ac..c2d6e6bb2 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -229,7 +229,7 @@ jobs:
       fail-fast: false
       matrix:
         build_type: [Release, Debug]
-        llvm_version: [17, 18, 19, 20, 21]
+        llvm_version: [17, 18, 19, 20]
 
     steps:
       - uses: actions/checkout@v4
@@ -407,7 +407,7 @@ jobs:
       fail-fast: false
       matrix:
         build_type: [Release, Debug]
-        llvm_version: [17, 18, 19, 20, 21]
+        llvm_version: [17, 18, 19, 20]
     steps:
       - uses: actions/checkout@v4
       - name: Install common deps