diff --git a/accessibility-rs/src/engine/mod.rs b/accessibility-rs/src/engine/mod.rs
index e2e79fc..e62304f 100644
--- a/accessibility-rs/src/engine/mod.rs
+++ b/accessibility-rs/src/engine/mod.rs
@@ -1,3 +1,4 @@
+#![deny(missing_docs)]
 /// audits
 pub mod audit;
 /// issue handling and formats
diff --git a/accessibility-rs/src/i18n/mod.rs b/accessibility-rs/src/i18n/mod.rs
index 998ffb9..9db98d8 100644
--- a/accessibility-rs/src/i18n/mod.rs
+++ b/accessibility-rs/src/i18n/mod.rs
@@ -1,2 +1,3 @@
+#![deny(missing_docs)]
 /// localization
 pub mod locales;