diff --git a/serde/src/lib.rs b/serde/src/lib.rs
index 84b5cd7e..5054263c 100644
--- a/serde/src/lib.rs
+++ b/serde/src/lib.rs
@@ -106,7 +106,7 @@
 //
 //    https://github.com/serde-rs/serde/issues/812
 #![cfg_attr(feature = "unstable", feature(never_type))]
-#![allow(unknown_lints, bare_trait_objects, deprecated)]
+#![allow(unknown_lints, bare_trait_objects, deprecated, mismatched_lifetime_syntaxes)]
 // Ignored clippy and clippy_pedantic lints
 #![allow(
     // clippy bug: https://github.com/rust-lang/rust-clippy/issues/5704
diff --git a/serde_derive/src/lib.rs b/serde_derive/src/lib.rs
index 715c2fab..a02ba990 100644
--- a/serde_derive/src/lib.rs
+++ b/serde_derive/src/lib.rs
@@ -64,6 +64,7 @@
     clippy::wildcard_imports
 )]
 #![cfg_attr(all(test, exhaustive), feature(non_exhaustive_omitted_patterns_lint))]
+#![allow(unknown_lints, mismatched_lifetime_syntaxes)]
 
 extern crate proc_macro2;
 extern crate quote;
diff --git a/serde_derive_internals/lib.rs b/serde_derive_internals/lib.rs
index c4a009c7..73680082 100644
--- a/serde_derive_internals/lib.rs
+++ b/serde_derive_internals/lib.rs
@@ -41,6 +41,7 @@
     clippy::unused_self,
     clippy::wildcard_imports
 )]
+#![allow(unknown_lints, mismatched_lifetime_syntaxes)]
 
 extern crate proc_macro2;
 extern crate quote;