diff --git a/chopper/README.md b/chopper/README.md
index d2419358..cf4d27ce 100644
--- a/chopper/README.md
+++ b/chopper/README.md
@@ -15,7 +15,7 @@ Chopper is an http client generator for Dart and Flutter using source_gen and in
 In your project's `pubspec.yaml` file, 
 
 * Add *chopper*'s latest version to your *dependencies*.
-* Add `build_runner: ^1.12.2` to your *dev_dependencies*.
+* Add `build_runner: ^2.4.9` to your *dev_dependencies*.
   * *build_runner* may already be in your *dev_dependencies* depending on your project setup and other dependencies.
 * Add *chopper_generator*'s latest version to your *dev_dependencies*.
 
@@ -26,7 +26,7 @@ dependencies:
   chopper: ^<latest version>
 
 dev_dependencies:
-  build_runner: ^1.12.2
+  build_runner: ^2.4.9
   chopper_generator: ^<latest version>
 ```