diff --git a/hotp/pubspec.yaml b/hotp/pubspec.yaml
index ed79914..afd7cf0 100644
--- a/hotp/pubspec.yaml
+++ b/hotp/pubspec.yaml
@@ -12,5 +12,5 @@ dependencies:
   crypto: ^3.0.2
 
 dev_dependencies:
-  lints: ^3.0.0
+  lints: ^4.0.0
   test: ^1.21.0
diff --git a/totp/pubspec.yaml b/totp/pubspec.yaml
index 06bfd30..8bebede 100644
--- a/totp/pubspec.yaml
+++ b/totp/pubspec.yaml
@@ -11,5 +11,5 @@ dependencies:
   hotp: ^0.0.2
 
 dev_dependencies:
-  lints: ^3.0.0
+  lints: ^4.0.0
   test: ^1.21.0