diff --git a/pubspec.yaml b/pubspec.yaml
index da153f9..5009da8 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -8,7 +8,7 @@ description: >
   routing by rewriting 404s to the root index.
 
 environment:
-  sdk: '>=2.18.0 <3.0.0'
+  sdk: '>=2.19.0 <3.0.0'
 
 dependencies:
   args: ^2.3.1