diff --git a/CHANGELOG.md b/CHANGELOG.md
index f11413b8..b08ad141 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,12 @@ All notable changes to this project will be documented in this file.
 The format is based now on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
+## 3.4.1 — 2024-03-24
+
+### Fixed
+
+* Fixed invalid group id error when >= 10 files are uploaded when using `mount_uploadcare_file_group`.
+
 ## 3.4.0 — 2024-03-05
 
 ### Fixed
diff --git a/README.md b/README.md
index e0ac9c34..cc9cf78d 100644
--- a/README.md
+++ b/README.md
@@ -287,7 +287,7 @@ The helper is detecting the value of the `multiple` property based on the mount
 ### File and Group wrappers
 
 When you mount either Uploadcare File or Group to an attribute, this attribute is getting wrapped with
-a Uploadcare object. This feature adds some usefull methods to the attribute.
+a Uploadcare object. This feature adds some useful methods to the attribute.
 
 #### Uploadcare File
 
@@ -300,7 +300,7 @@ class Post < ApplicationRecord
 end
 ```
 
-And then you create a new Post object specifying a CDN-url for your prevously uploaded Uploadcare file:
+And then you create a new Post object specifying a CDN-url for your previously uploaded Uploadcare file:
 
 ```console
 $ post = Post.create(picture: "https://ucarecdn.com/2d33999d-c74a-4ff9-99ea-abc23496b052/")
diff --git a/lib/uploadcare/rails/active_record/mount_uploadcare_file_group.rb b/lib/uploadcare/rails/active_record/mount_uploadcare_file_group.rb
index 9d2fe105..4a50bc16 100644
--- a/lib/uploadcare/rails/active_record/mount_uploadcare_file_group.rb
+++ b/lib/uploadcare/rails/active_record/mount_uploadcare_file_group.rb
@@ -13,7 +13,7 @@ module ActiveRecord
       module MountUploadcareFileGroup
         extend ActiveSupport::Concern
 
-        GROUP_ID_REGEX = /\b[0-9a-f]{8}\b-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-\b[0-9a-f]{12}\b~\d/.freeze
+        GROUP_ID_REGEX = /\b[0-9a-f]{8}\b-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-\b[0-9a-f]{12}\b~\d+/.freeze
 
         def build_uploadcare_file_group(attribute)
           cdn_url = attributes[attribute.to_s].to_s
diff --git a/lib/uploadcare/rails/version.rb b/lib/uploadcare/rails/version.rb
index bc960928..cef1375f 100644
--- a/lib/uploadcare/rails/version.rb
+++ b/lib/uploadcare/rails/version.rb
@@ -2,6 +2,6 @@
 
 module Uploadcare
   module Rails
-    VERSION = '3.4.0'
+    VERSION = '3.4.1'
   end
 end
diff --git a/spec/uploadcare/rails/active_record/mount_uploadcare_group_spec.rb b/spec/uploadcare/rails/active_record/mount_uploadcare_group_spec.rb
index 9dc6be9b..fc265e41 100644
--- a/spec/uploadcare/rails/active_record/mount_uploadcare_group_spec.rb
+++ b/spec/uploadcare/rails/active_record/mount_uploadcare_group_spec.rb
@@ -29,4 +29,18 @@ def initialize
       expect(Post).to respond_to(:has_uploadcare_file_group_for_gallery?)
     end
   end
+
+  describe 'GROUP_ID_REGEX' do
+    it 'properly extracts out group id from the cdn url' do
+      extracted_group_id = Uploadcare::Rails::IdExtractor.call(
+        'https://ucarecdn.com/dc140069-62b1-4ee0-b603-18e2062e26e4~11/', subject::GROUP_ID_REGEX
+      )
+      expect(extracted_group_id).to eq('dc140069-62b1-4ee0-b603-18e2062e26e4~11')
+
+      extracted_group_id = Uploadcare::Rails::IdExtractor.call(
+        'https://ucarecdn.com/dc140069-62b1-4ee0-b603-18e2062e26e4~1/', subject::GROUP_ID_REGEX
+      )
+      expect(extracted_group_id).to eq('dc140069-62b1-4ee0-b603-18e2062e26e4~1')
+    end
+  end
 end