diff --git a/google-cloud-pubsub/Gemfile b/google-cloud-pubsub/Gemfile
index f90528b3cf90..707e98450326 100644
--- a/google-cloud-pubsub/Gemfile
+++ b/google-cloud-pubsub/Gemfile
@@ -32,7 +32,7 @@ gem "ostruct", "~> 0.6"
 gem "pry", "~> 0.15.2"
 gem "rake"
 gem "redcarpet", "~> 3.6.1"
-gem "retriable", "~> 3.1.2"
+gem "retriable", ">= 3.1.2", "< 3.4.1"
 gem "simplecov", "~> 0.22"
 gem "yard", "~> 0.9.37"
 gem "yard-doctest", "~> 0.1.17"