diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index d35c4d82..012da567 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -8,18 +8,18 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        clang_version: [10.0.0]
+        clang_version: [11.0.0]
         # use different LLVM versions among oses because of the lack of
         # official assets on github.
         include:
           - os: ubuntu-latest
-            clang_version: 10.0.0
-            llvm_asset_suffix: x86_64-linux-gnu-ubuntu-18.04
+            clang_version: 11.0.0
+            llvm_asset_suffix: x86_64-linux-gnu-ubuntu-16.04
           - os: macos-latest
-            clang_version: 10.0.0
+            clang_version: 11.0.0
             llvm_asset_suffix: x86_64-apple-darwin
           - os: windows-latest
-            clang_version: 10.0.0
+            clang_version: 11.0.0
           - os: ubuntu-latest
             clang_version: 16.0.0
             llvm_asset_suffix: x86_64-linux-gnu-ubuntu-18.04
@@ -93,7 +93,7 @@ jobs:
       # Only build the thread-capable wasi-libc in the latest supported Clang
       # version; the earliest version does not have all necessary builtins
       # (e.g., `__builtin_wasm_memory_atomic_notify`).
-      if: matrix.clang_version != '10.0.0'
+      if: matrix.clang_version != '11.0.0'
       shell: bash
       run: |
         make -j4 THREAD_MODEL=posix TARGET_TRIPLE=wasm32-wasi-threads
@@ -127,7 +127,7 @@ jobs:
       # test entrypoints: `undefined symbol: __main_argc_argv`.
       # The older (<15.0.7) version of wasm-ld does not provide `__heap_end`,
       # which is required by our malloc implementation.
-      if: matrix.os == 'ubuntu-latest' && matrix.clang_version != '10.0.0'
+      if: matrix.os == 'ubuntu-latest' && matrix.clang_version != '11.0.0'
 
     - uses: actions/upload-artifact@v1
       with: