diff --git a/clippy.toml b/clippy.toml
index c65f45a..5616f26 100644
--- a/clippy.toml
+++ b/clippy.toml
@@ -1,3 +1,3 @@
-cyclomatic-complexity-threshold = 1337
+cognitive-complexity-threshold = 1337
 
 doc-valid-idents = ["FreeBSD"]
diff --git a/src/lexer.rs b/src/lexer.rs
index 1fb05b4..f94cc49 100644
--- a/src/lexer.rs
+++ b/src/lexer.rs
@@ -359,7 +359,7 @@ impl<'a> Lexer<'a> {
       ' ' | '\t' => self.lex_whitespace(),
       '\'' => self.lex_raw_string(),
       '"' => self.lex_cooked_string(),
-      'a'...'z' | 'A'...'Z' | '_' => self.lex_name(),
+      'a'..='z' | 'A'..='Z' | '_' => self.lex_name(),
       _ => {
         self.advance()?;
         Err(self.error(UnknownStartOfToken))