diff --git a/pubspec.yaml b/pubspec.yaml
index 1d981ee..5a4bc89 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -4,7 +4,7 @@ version: 0.7.0
 homepage: https://github.com/leisim/dartx
 
 environment:
-  sdk: '>=2.12.0-0 <3.0.0'
+  sdk: '>=2.12.0 <3.0.0'
 
 dependencies:
   characters: ^1.1.0