diff --git a/Gemfile b/Gemfile
index 10b89491..4949b993 100644
--- a/Gemfile
+++ b/Gemfile
@@ -13,7 +13,7 @@ gem "httparty"
 gem "pact", require: false
 gem "pact_broker-client"
 gem "pg"
-gem "psych", "<5"
+gem "psych", "<6"
 gem "rubyzip"
 gem "sentry-sidekiq"
 gem "sidekiq-scheduler"
diff --git a/Gemfile.lock b/Gemfile.lock
index 2b430695..a6a9b6c5 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -475,7 +475,7 @@ GEM
     plek (5.0.0)
     prometheus_exporter (2.0.8)
       webrick
-    psych (4.0.6)
+    psych (5.1.1)
       stringio
     public_suffix (5.0.3)
     puma (6.4.0)
@@ -684,7 +684,7 @@ DEPENDENCIES
   pact
   pact_broker-client
   pg
-  psych (< 5)
+  psych (< 6)
   rails (= 7.1.1)
   rspec-rails
   rubocop-govuk