diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 06609f84..a7fb9b58 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -54,6 +54,7 @@ jobs:
       CARGO_VARIANT_FLAG: ${{ matrix.config.variant == 'release' && '--release' || '' }}
       LIB_NAME: ${{ contains(matrix.config.target, 'windows') && 'rusty_v8' || 'librusty_v8' }}
       LIB_EXT: ${{ contains(matrix.config.target, 'windows') && 'lib' || 'a' }}
+      RUSTFLAGS: -D warnings
 
     steps:
       - name: Configure git