diff --git a/pubspec.yaml b/pubspec.yaml
index dc0529d..2233eb1 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -30,7 +30,8 @@ dependencies:
   collection: ^1.17.2
 
 dev_dependencies:
-  build_runner: ^2.4.5
+  # 2.4.5 doesn't work with logging.
+  build_runner: 2.4.4
   build_version: ^2.1.1
   test: ^1.24.3
   lints: ^2.1.1