Try CI
diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index e0ff8c0..05972cf 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -48,7 +48,7 @@
       - name: 'Install Dependencies'
         run: |
           sudo luarocks install luaunit
-          sudo luarocks install lua-cjson
+          sudo luarocks install lua-cjson 2.1.0-1
       - name: 'Run Tests'
         run: |
           cd lib/skywalking