diff --git a/Cargo.toml b/Cargo.toml
index 937d5dd3..4e87e4d7 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -192,6 +192,7 @@ missing_abi = "warn"
 # missing_docs = "warn"
 noop_method_call = "warn"
 pointer_structural_match = "warn"
+explicit_outlives_requirements = "warn"
 # unreachable_pub = "warn"
 unused_extern_crates = "warn"
 unused_import_braces = "warn"