diff --git a/pubspec.yaml b/pubspec.yaml
index d13bd8cb80..7cc0884573 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -16,7 +16,7 @@ dependencies:
   yaml: ^3.1.0
 
 environment:
-  sdk: ">=2.12.0 <3.0.0"
+  sdk: '>=2.12.0 <3.0.0'
 
 dev_dependencies:
   # Needed by build_version