diff --git a/example/pubspec.yaml b/example/pubspec.yaml
index 9cc5f27..3fb2ca5 100644
--- a/example/pubspec.yaml
+++ b/example/pubspec.yaml
@@ -5,7 +5,7 @@ description: Flux library for uni-directional dataflow inspired by reflux and Fa
 homepage: https://github.com/Workiva/w_flux
 publish_to: none
 environment:
-    sdk: '>=2.12.0 <3.0.0'
+    sdk: '>=2.19.0 <3.0.0'
 dependencies:
   w_flux: 
 
diff --git a/pubspec.yaml b/pubspec.yaml
index 0628a70..533de02 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -5,7 +5,7 @@ description: Flux library for uni-directional dataflow inspired by reflux and Fa
 homepage: https://github.com/Workiva/w_flux
 
 environment:
-  sdk: '>=2.12.0 <3.0.0'
+  sdk: '>=2.19.0 <3.0.0'
 
 dependencies:
   meta: ^1.16.0