diff --git a/pubspec.yaml b/pubspec.yaml
index e648f72a..9f0c563d 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -11,7 +11,7 @@ dependencies:
   autotrie: ^2.0.0
   characters: ^1.2.1
   charcode: ^1.3.1
-  collection: ^1.18.0
+  collection: ^1.17.2
   equatable: ^2.0.5
   flutter: { sdk: flutter }
   flutter_highlight: ^0.7.0