diff --git a/pubspec.yaml b/pubspec.yaml
index 10a252c..f2d288b 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -5,7 +5,7 @@ author: Aloïs Deniel<alois.deniel@gmail.com>
 homepage: https://github.com/aloisdeniel/flutter_geocoder
 
 environment:
-    sdk: ">=2.0.0 <3.0.0"
+    sdk: '>=2.12.0 <3.0.0'
 
 dependencies:
   meta: ^1.1.6