diff --git a/Gemfile b/Gemfile
index fba0770da..41989de10 100644
--- a/Gemfile
+++ b/Gemfile
@@ -34,7 +34,7 @@ gem "faker"
 gem "filewatcher", "~> 3.0"
 gem "flutie"
 gem "font-awesome-rails"
-gem "google-cloud-pubsub", "2.23.0"
+gem "google-cloud-pubsub", "3.4.0"
 # This breaks PreserveResourceJob somewhere between 1.39 and 1.44.
 gem "google-cloud-storage", "1.62.0"
 gem "graphiql-rails", "1.10.5", group: :development
diff --git a/Gemfile.lock b/Gemfile.lock
index 548e58247..9bf59f017 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -498,7 +498,7 @@ GEM
       base64 (~> 0.2)
       faraday (>= 1.0, < 3.a)
     google-cloud-errors (1.7.0)
-    google-cloud-pubsub (2.23.0)
+    google-cloud-pubsub (3.4.0)
       concurrent-ruby (~> 1.3)
       google-cloud-core (~> 1.8)
       google-cloud-pubsub-v1 (~> 1.11)
@@ -1257,7 +1257,7 @@ DEPENDENCIES
   font-awesome-rails
   foreman
   formulaic
-  google-cloud-pubsub (= 2.23.0)
+  google-cloud-pubsub (= 3.4.0)
   google-cloud-storage (= 1.62.0)
   graphiql-rails (= 1.10.5)
   graphql (~> 1.13.19)