diff --git a/pubspec.yaml b/pubspec.yaml
index d28a78b..2c93b1e 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -9,6 +9,7 @@ environment:
 
 dependencies:
   http: '^0.11.0'
+  http_parser: ">=0.0.1 <4.0.0"
 
 dev_dependencies:
   test: '^0.12.32'
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