diff --git a/Gemfile b/Gemfile
index fa75df15..c55c81ac 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,3 +1,5 @@
 source 'https://rubygems.org'
 
+gem 'google-protobuf', '~> 3.19.6'
+
 gemspec
diff --git a/examples/Gemfile b/examples/Gemfile
index 38523465..4a744598 100644
--- a/examples/Gemfile
+++ b/examples/Gemfile
@@ -4,5 +4,6 @@ gem 'temporal-ruby', path: '../'
 
 gem 'dry-types', '>= 1.7.2'
 gem 'dry-struct', '~> 1.6.0'
+gem 'google-protobuf', '~> 3.19.6'
 
 gem 'rspec', group: :test