diff --git a/gemfiles/rails_7.0.gemfile b/gemfiles/rails_7.0.gemfile
index f32a1ff..f395ee7 100644
--- a/gemfiles/rails_7.0.gemfile
+++ b/gemfiles/rails_7.0.gemfile
@@ -3,6 +3,6 @@
 source "https://rubygems.org"
 
 gem "rails", "~> 7.0.2"
-gem "sqlite3"
+gem "sqlite3", "~> 1.4.0"
 
 gemspec path: "../"
diff --git a/lib/webhook_system/base_event.rb b/lib/webhook_system/base_event.rb
index f8cce27..7f10526 100644
--- a/lib/webhook_system/base_event.rb
+++ b/lib/webhook_system/base_event.rb
@@ -6,8 +6,8 @@ module WebhookSystem
   class BaseEvent
     include PhModel
 
-    def initialize(*args, &block)
-      super(*args, &block)
+    def initialize(...)
+      super
       @event_id = SecureRandom.uuid.freeze
     end
 
diff --git a/lib/webhook_system/encoder.rb b/lib/webhook_system/encoder.rb
index 75837cd..cb1362a 100644
--- a/lib/webhook_system/encoder.rb
+++ b/lib/webhook_system/encoder.rb
@@ -1,5 +1,7 @@
 # frozen_string_literal: true
 
+require 'base64'
+
 module WebhookSystem
 
   # Class in charge of encoding and decoding encrypted payload
diff --git a/lib/webhook_system/subscription.rb b/lib/webhook_system/subscription.rb
index fba26bc..638cd70 100644
--- a/lib/webhook_system/subscription.rb
+++ b/lib/webhook_system/subscription.rb
@@ -53,10 +53,8 @@ def topic_names=(new_topics)
       new_topics.reject!(&:blank?)
       add_topics = new_topics - topic_names
 
-      new_topics_attributes = []
-
-      topics.each do |topic|
-        new_topics_attributes << {
+      new_topics_attributes = topics.map do |topic|
+        {
           id: topic.id,
           name: topic.name,
           _destroy: new_topics.exclude?(topic.name),
diff --git a/test.db-shm b/test.db-shm
new file mode 100644
index 0000000..b371393
Binary files /dev/null and b/test.db-shm differ
diff --git a/test.db-wal b/test.db-wal
new file mode 100644
index 0000000..0e80a56
Binary files /dev/null and b/test.db-wal differ