diff --git a/.github/workflows/macos-unit.yml b/.github/workflows/macos-unit.yml
index ed26c85..631ba10 100644
--- a/.github/workflows/macos-unit.yml
+++ b/.github/workflows/macos-unit.yml
@@ -17,7 +17,10 @@ jobs:
 
     steps:
       - uses: actions/checkout@v3
-
+      
+      - name: install openmp
+        run: brew install libomp
+      
       - name: make build directory
         run: mkdir build_dir
 
diff --git a/.github/workflows/ubuntu-unit.yml b/.github/workflows/ubuntu-unit.yml
index 654ad3b..673ed80 100644
--- a/.github/workflows/ubuntu-unit.yml
+++ b/.github/workflows/ubuntu-unit.yml
@@ -56,6 +56,7 @@ jobs:
 
       - name: install compiler
         run: sudo apt install ${{matrix.compiler}}
+      - run: sudo apt install libomp-dev
 
       - name: make build directory
         run: mkdir build_dir