diff --git a/.gitea/workflows/ci.yml b/.gitea/workflows/ci.yml
index a803971..e78cfe8 100644
--- a/.gitea/workflows/ci.yml
+++ b/.gitea/workflows/ci.yml
@@ -45,7 +45,7 @@ jobs:
             pkg-config
 
       - name: Build
-        run: cargo build --locked -j 4
+        run: RUSTFLAGS="-D warnings" cargo build --locked -j 4
 
       - name: Run unit tests
         run: cargo test --locked --lib -j 4