diff --git a/pubspec.yaml b/pubspec.yaml
index aad8bf2..a3c957c 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -22,7 +22,7 @@ dev_dependencies:
   build_runner: ^2.0.0
   build_verify: ^3.0.0
   build_version: ^2.0.0
-  mocktail: ^0.3.0
+  mocktail: ">=0.3.0 <2.0.0"
   test: ^1.19.2
   very_good_analysis: ^4.0.0