diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 159a404..854b26a 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -9,11 +9,22 @@ on:
 jobs:
   linux:
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        encoding:
+          - ICONV
+          - ICU
+    env:
+      ENCODING_TYPE: ${{matrix.encoding}}
     steps:
       - uses: actions/checkout@v3
       - name: restore
         run: |
           sudo apt-get install -y libgtest-dev
+      - name: restore ICU
+        run: |
+          sudo apt-get install -y libicu-dev
+        if: matrix.encoding == "ICU"
       - name: build
         run: .build/build
       - name: unittest