diff --git a/pubspec.yaml b/pubspec.yaml
index d90577e21..e27cdd13d 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -25,7 +25,7 @@ dependencies:
   package_config: ^2.0.0
   path: ^1.8.0
   pool: ^1.5.1
-  protobuf: "^4.0.0"
+  protobuf: ">=4.0.0 <6.0.0"
   pub_semver: ^2.0.0
   source_maps: ^0.10.10
   source_span: ^1.10.0
@@ -45,7 +45,7 @@ dev_dependencies:
   grinder: ^0.9.0
   node_preamble: ^2.0.2
   lints: ">=4.0.0 <7.0.0"
-  protoc_plugin: "^22.0.1"
+  protoc_plugin: ">=22.0.1 <24.0.0"
   pub_api_client: ">=2.1.1 <4.0.0"
   pubspec_parse: ^1.3.0
   test: ^1.16.7