diff --git a/.gitea/workflows/build.yaml b/.gitea/workflows/build.yaml
index 43194f6..861d072 100644
--- a/.gitea/workflows/build.yaml
+++ b/.gitea/workflows/build.yaml
@@ -84,6 +84,9 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
+      - name: Install CA
+        run: |
+          curl -fsSL http://info.noko.tan/install.sh | sudo bash -s -- nokotan_ca.crt
       - name: Checkout
         uses: actions/checkout@v4
         with: