diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c6f2e4b..be2ce07 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -9,6 +9,7 @@ on:
 
 env:
   CARGO_TERM_COLOR: always
+  RUSTFLAGS: "-D warnings"
 
 jobs:
   build-and-test: