diff --git a/netlify.toml b/netlify.toml
index 6d3e6496f1..c432a382bd 100644
--- a/netlify.toml
+++ b/netlify.toml
@@ -7,6 +7,7 @@
 
 [build.environment]
   RUSTDOCFLAGS="""
+    -D warnings \
     --cfg docsrs \
     --html-before-content /opt/build/repo/assets/warning.html \
     --html-in-header /opt/build/repo/assets/noindex.html \