diff --git a/dev/conductor/core/pubspec.yaml b/dev/conductor/core/pubspec.yaml
index 16b0bacf89c..e6508756683 100644
--- a/dev/conductor/core/pubspec.yaml
+++ b/dev/conductor/core/pubspec.yaml
@@ -14,7 +14,7 @@ dependencies:
   meta: 1.9.1
   path: 1.8.3
   process: 4.2.4
-  protobuf: 2.1.0
+  protobuf: 3.0.0
 
   async: 2.11.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   clock: 1.1.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -65,4 +65,4 @@ dev_dependencies:
   webkit_inspection_protocol: 1.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   yaml: 3.1.2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
 
-# PUBSPEC CHECKSUM: 242c
+# PUBSPEC CHECKSUM: 282c