diff --git a/serde/src/lib.rs b/serde/src/lib.rs
index 2a365724..b5ba3df9 100644
--- a/serde/src/lib.rs
+++ b/serde/src/lib.rs
@@ -109,6 +109,7 @@
         // not practical
         needless_pass_by_value,
         similar_names,
+        too_many_lines,
         // preference
         doc_markdown,
     )
diff --git a/serde_derive/src/lib.rs b/serde_derive/src/lib.rs
index bd196a3e..0126b133 100644
--- a/serde_derive/src/lib.rs
+++ b/serde_derive/src/lib.rs
@@ -45,6 +45,7 @@
         module_name_repetitions,
         similar_names,
         single_match_else,
+        too_many_lines,
         unseparated_literal_suffix,
         use_self,
     )