diff --git a/pubspec.yaml b/pubspec.yaml
index 6259aead..ba60df13 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -13,7 +13,6 @@ dependencies:
   body_parser: ^1.0.0
   charcode: ^1.0.0
   combinator: ^1.0.0
-  dart2_constant: ^1.0.0
   file: ^5.0.0
   http_parser: ^3.0.0
   http2: ">=0.1.7 <2.0.0"