diff --git a/pubspec.yaml b/pubspec.yaml
index d4d3742..8988936 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -9,7 +9,7 @@ environment:
 dependencies:
   collection: ^1.14.11
   path: ^1.6.2
-  crypto: ">=2.1.0 <2.2.0"
+  crypto: ^2.1.0
   characters: ">=0.4.0 <2.0.0"
   time: ^1.2.0