diff --git a/Gemfile.lock b/Gemfile.lock
index 2b98f611a..2895a5472 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -340,7 +340,7 @@ GEM
     mime-types-data (3.2024.0702)
     mini_mime (1.1.5)
     mini_portile2 (2.8.7)
-    minitest (5.24.1)
+    minitest (5.25.1)
     minitest-reporters (1.7.1)
       ansi
       builder
@@ -354,11 +354,10 @@ GEM
       railties (>= 3.1)
     mongo (2.20.1)
       bson (>= 4.14.1, < 6.0.0)
-    mongoid (8.1.2)
-      activemodel (>= 5.1, < 7.1, != 7.0.0)
+    mongoid (9.0.1)
+      activemodel (>= 5.1, < 7.2, != 7.0.0)
       concurrent-ruby (>= 1.0.5, < 2.0)
       mongo (>= 2.18.0, < 3.0.0)
-      ruby2_keywords (~> 0.0.5)
     mongoid-sadstory (0.0.2)
       mongoid
     mousetrap-rails (1.4.6)
diff --git a/config/mongoid.yml b/config/mongoid.yml
index 6fb3116cf..2d7795039 100644
--- a/config/mongoid.yml
+++ b/config/mongoid.yml
@@ -4,7 +4,6 @@ development:
     default:
       uri: <%= ENV["MONGODB_URI"] || "mongodb://localhost/govuk_content_development" %>
   options:
-    use_activesupport_time_zone: true
     belongs_to_required_by_default: false
 
 test:
@@ -16,7 +15,6 @@ test:
           mode: :primary
         max_pool_size: 1
   options:
-    use_activesupport_time_zone: true
     belongs_to_required_by_default: false
 
 # set these environment variables on your prod server
@@ -25,5 +23,4 @@ production:
     default:
       uri: <%= ENV['MONGODB_URI'] %>
   options:
-    use_activesupport_time_zone: true
     belongs_to_required_by_default: false