diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 6c87ad67..7c04de18 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "1.162.0"
+  ".": "1.163.0"
 }
\ No newline at end of file
diff --git a/.stats.yml b/.stats.yml
index e08e2557..e72d6310 100644
--- a/.stats.yml
+++ b/.stats.yml
@@ -1,4 +1,4 @@
 configured_endpoints: 230
-openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/increase%2Fincrease-d9f5f3bab4d163b340b6737dde4f7a46bca89379801bcc761c4221a24f8cc4cf.yml
-openapi_spec_hash: 7b5eddf42e9fa57ec04b5b1b6d9ff872
+openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/increase%2Fincrease-f184b6347de456d3db4fc3d5c691beb9dec85f74849cc4439a9dd4635998b1ec.yml
+openapi_spec_hash: 255de9f0f702449bddf655b19a09a0cd
 config_hash: ff2eb5f192b4de36611b37b27961c2d8
diff --git a/CHANGELOG.md b/CHANGELOG.md
index cdcbb7e7..98dfd2cf 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 # Changelog
 
+## 1.163.0 (2025-12-15)
+
+Full Changelog: [v1.162.0...v1.163.0](https://github.com/Increase/increase-ruby/compare/v1.162.0...v1.163.0)
+
+### Features
+
+* **api:** api update ([e460bf9](https://github.com/Increase/increase-ruby/commit/e460bf9922c48bef47dc445ea2d40fd7da99c249))
+
 ## 1.162.0 (2025-12-15)
 
 Full Changelog: [v1.161.0...v1.162.0](https://github.com/Increase/increase-ruby/compare/v1.161.0...v1.162.0)
diff --git a/Gemfile.lock b/Gemfile.lock
index 8a56e659..8cddc766 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -11,7 +11,7 @@ GIT
 PATH
   remote: .
   specs:
-    increase (1.162.0)
+    increase (1.163.0)
       connection_pool
 
 GEM
diff --git a/README.md b/README.md
index c989ef0e..fa3db6b7 100644
--- a/README.md
+++ b/README.md
@@ -15,7 +15,7 @@ To use this gem, install via Bundler by adding the following to your application
 <!-- x-release-please-start-version -->
 
 ```ruby
-gem "increase", "~> 1.162.0"
+gem "increase", "~> 1.163.0"
 ```
 
 <!-- x-release-please-end -->
diff --git a/lib/increase/models/file.rb b/lib/increase/models/file.rb
index 3da893a6..019cf4f4 100644
--- a/lib/increase/models/file.rb
+++ b/lib/increase/models/file.rb
@@ -132,7 +132,7 @@ module Purpose
         # An image of a check that was mailed to a recipient.
         MAILED_CHECK_IMAGE = :mailed_check_image
 
-        # A document to be printed on an additional page and mailed with a check that you've requested Increase print.
+        # A document to be printed on an additional page and mailed with a check that you've requested Increase print. This must be a PDF whose pages are all US letter size and all have the same orientation.
         CHECK_ATTACHMENT = :check_attachment
 
         # An image to be used as the check voucher image, which is printed in the middle of the trifold area of a check. This must be a 2550x1100 pixel PNG.
diff --git a/lib/increase/models/file_create_params.rb b/lib/increase/models/file_create_params.rb
index 62de2106..fe8aa064 100644
--- a/lib/increase/models/file_create_params.rb
+++ b/lib/increase/models/file_create_params.rb
@@ -55,7 +55,7 @@ module Purpose
         # An image of a check that was mailed to a recipient.
         MAILED_CHECK_IMAGE = :mailed_check_image
 
-        # A document to be printed on an additional page and mailed with a check that you've requested Increase print.
+        # A document to be printed on an additional page and mailed with a check that you've requested Increase print. This must be a PDF whose pages are all US letter size and all have the same orientation.
         CHECK_ATTACHMENT = :check_attachment
 
         # An image to be used as the check voucher image, which is printed in the middle of the trifold area of a check. This must be a 2550x1100 pixel PNG.
diff --git a/lib/increase/models/file_list_params.rb b/lib/increase/models/file_list_params.rb
index 8aa5111b..6a2c90fa 100644
--- a/lib/increase/models/file_list_params.rb
+++ b/lib/increase/models/file_list_params.rb
@@ -134,7 +134,7 @@ module In
           # An image of a check that was mailed to a recipient.
           MAILED_CHECK_IMAGE = :mailed_check_image
 
-          # A document to be printed on an additional page and mailed with a check that you've requested Increase print.
+          # A document to be printed on an additional page and mailed with a check that you've requested Increase print. This must be a PDF whose pages are all US letter size and all have the same orientation.
           CHECK_ATTACHMENT = :check_attachment
 
           # An image to be used as the check voucher image, which is printed in the middle of the trifold area of a check. This must be a 2550x1100 pixel PNG.
diff --git a/lib/increase/version.rb b/lib/increase/version.rb
index 36fc743f..e6286e2f 100644
--- a/lib/increase/version.rb
+++ b/lib/increase/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module Increase
-  VERSION = "1.162.0"
+  VERSION = "1.163.0"
 end
diff --git a/rbi/increase/models/file.rbi b/rbi/increase/models/file.rbi
index ed87d6f4..0f93ee86 100644
--- a/rbi/increase/models/file.rbi
+++ b/rbi/increase/models/file.rbi
@@ -170,7 +170,7 @@ module Increase
         MAILED_CHECK_IMAGE =
           T.let(:mailed_check_image, Increase::File::Purpose::TaggedSymbol)
 
-        # A document to be printed on an additional page and mailed with a check that you've requested Increase print.
+        # A document to be printed on an additional page and mailed with a check that you've requested Increase print. This must be a PDF whose pages are all US letter size and all have the same orientation.
         CHECK_ATTACHMENT =
           T.let(:check_attachment, Increase::File::Purpose::TaggedSymbol)
 
diff --git a/rbi/increase/models/file_create_params.rbi b/rbi/increase/models/file_create_params.rbi
index 6eb61a81..13a40d07 100644
--- a/rbi/increase/models/file_create_params.rbi
+++ b/rbi/increase/models/file_create_params.rbi
@@ -98,7 +98,7 @@ module Increase
             Increase::FileCreateParams::Purpose::TaggedSymbol
           )
 
-        # A document to be printed on an additional page and mailed with a check that you've requested Increase print.
+        # A document to be printed on an additional page and mailed with a check that you've requested Increase print. This must be a PDF whose pages are all US letter size and all have the same orientation.
         CHECK_ATTACHMENT =
           T.let(
             :check_attachment,
diff --git a/rbi/increase/models/file_list_params.rbi b/rbi/increase/models/file_list_params.rbi
index 83897845..e4809581 100644
--- a/rbi/increase/models/file_list_params.rbi
+++ b/rbi/increase/models/file_list_params.rbi
@@ -262,7 +262,7 @@ module Increase
               Increase::FileListParams::Purpose::In::TaggedSymbol
             )
 
-          # A document to be printed on an additional page and mailed with a check that you've requested Increase print.
+          # A document to be printed on an additional page and mailed with a check that you've requested Increase print. This must be a PDF whose pages are all US letter size and all have the same orientation.
           CHECK_ATTACHMENT =
             T.let(
               :check_attachment,
diff --git a/sig/increase/models/file.rbs b/sig/increase/models/file.rbs
index 988a41dd..fe2306a3 100644
--- a/sig/increase/models/file.rbs
+++ b/sig/increase/models/file.rbs
@@ -124,7 +124,7 @@ module Increase
         # An image of a check that was mailed to a recipient.
         MAILED_CHECK_IMAGE: :mailed_check_image
 
-        # A document to be printed on an additional page and mailed with a check that you've requested Increase print.
+        # A document to be printed on an additional page and mailed with a check that you've requested Increase print. This must be a PDF whose pages are all US letter size and all have the same orientation.
         CHECK_ATTACHMENT: :check_attachment
 
         # An image to be used as the check voucher image, which is printed in the middle of the trifold area of a check. This must be a 2550x1100 pixel PNG.
diff --git a/sig/increase/models/file_create_params.rbs b/sig/increase/models/file_create_params.rbs
index a8dcf887..c6927bec 100644
--- a/sig/increase/models/file_create_params.rbs
+++ b/sig/increase/models/file_create_params.rbs
@@ -70,7 +70,7 @@ module Increase
         # An image of a check that was mailed to a recipient.
         MAILED_CHECK_IMAGE: :mailed_check_image
 
-        # A document to be printed on an additional page and mailed with a check that you've requested Increase print.
+        # A document to be printed on an additional page and mailed with a check that you've requested Increase print. This must be a PDF whose pages are all US letter size and all have the same orientation.
         CHECK_ATTACHMENT: :check_attachment
 
         # An image to be used as the check voucher image, which is printed in the middle of the trifold area of a check. This must be a 2550x1100 pixel PNG.
diff --git a/sig/increase/models/file_list_params.rbs b/sig/increase/models/file_list_params.rbs
index 1fc8fcbe..1ff07c90 100644
--- a/sig/increase/models/file_list_params.rbs
+++ b/sig/increase/models/file_list_params.rbs
@@ -163,7 +163,7 @@ module Increase
           # An image of a check that was mailed to a recipient.
           MAILED_CHECK_IMAGE: :mailed_check_image
 
-          # A document to be printed on an additional page and mailed with a check that you've requested Increase print.
+          # A document to be printed on an additional page and mailed with a check that you've requested Increase print. This must be a PDF whose pages are all US letter size and all have the same orientation.
           CHECK_ATTACHMENT: :check_attachment
 
           # An image to be used as the check voucher image, which is printed in the middle of the trifold area of a check. This must be a 2550x1100 pixel PNG.