diff --git a/Gemfile.lock b/Gemfile.lock
index 623aada..14c5e12 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,8 +1,8 @@
 PATH
   remote: .
   specs:
-    pubsub_tie (0.0.1)
-      google-cloud-pubsub (>= 1.6.0)
+    pubsub_tie (0.0.2)
+      google-cloud-pubsub (~> 1.6)
 
 GEM
   remote: https://rubygems.org/
@@ -93,4 +93,4 @@ DEPENDENCIES
   rspec (~> 3.0)
 
 BUNDLED WITH
-   1.17.2
+   1.17.3