diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 061f355bf..24b1176fb 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "1.55.0"
+  ".": "1.56.0"
 }
\ No newline at end of file
diff --git a/.stats.yml b/.stats.yml
index c5bae0923..a9bb289dd 100644
--- a/.stats.yml
+++ b/.stats.yml
@@ -1,4 +1,4 @@
 configured_endpoints: 216
-openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/increase%2Fincrease-1c5db818b8692ac57a83f3785c2f0a1d1ea95b9ed35fd4632619947448c22526.yml
-openapi_spec_hash: 0b2954fbe726a422219f22f5cddda6d6
+openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/increase%2Fincrease-6db60f3531381822fadaf766a9191d837e5f512c5dee67d09e4a42b4d307b9c6.yml
+openapi_spec_hash: 236e86b03890539f5f36e6e458fc01c4
 config_hash: 632b628b59d8f0b717153b3d8133f6cb
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2ebb63bd8..1e27d22f2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 # Changelog
 
+## 1.56.0 (2025-08-28)
+
+Full Changelog: [v1.55.0...v1.56.0](https://github.com/Increase/increase-ruby/compare/v1.55.0...v1.56.0)
+
+### Features
+
+* **api:** api update ([cbaeb33](https://github.com/Increase/increase-ruby/commit/cbaeb3304174c05c0a3fffd559d44019974c2afb))
+
 ## 1.55.0 (2025-08-27)
 
 Full Changelog: [v1.54.0...v1.55.0](https://github.com/Increase/increase-ruby/compare/v1.54.0...v1.55.0)
diff --git a/Gemfile.lock b/Gemfile.lock
index 3fbd5ea4b..01ebed2e0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -11,7 +11,7 @@ GIT
 PATH
   remote: .
   specs:
-    increase (1.55.0)
+    increase (1.56.0)
       connection_pool
 
 GEM
diff --git a/README.md b/README.md
index 58a52a7e9..62f5b7a68 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", "~> 1.55.0"
+gem "increase", "~> 1.56.0"
 ```
 
 <!-- x-release-please-end -->
diff --git a/lib/increase/models/declined_transaction.rb b/lib/increase/models/declined_transaction.rb
index 375a0174f..e6e7536f5 100644
--- a/lib/increase/models/declined_transaction.rb
+++ b/lib/increase/models/declined_transaction.rb
@@ -1780,6 +1780,9 @@ module Reason
             # The check cannot be processed. This is rare: please contact support.
             UNABLE_TO_PROCESS = :unable_to_process
 
+            # The check image is unusable.
+            UNUSABLE_IMAGE = :unusable_image
+
             # Your integration declined this check via the API.
             USER_INITIATED = :user_initiated
 
diff --git a/lib/increase/version.rb b/lib/increase/version.rb
index 4f84ddab0..c5ee5488a 100644
--- a/lib/increase/version.rb
+++ b/lib/increase/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module Increase
-  VERSION = "1.55.0"
+  VERSION = "1.56.0"
 end
diff --git a/rbi/increase/models/declined_transaction.rbi b/rbi/increase/models/declined_transaction.rbi
index 40946830b..7355810af 100644
--- a/rbi/increase/models/declined_transaction.rbi
+++ b/rbi/increase/models/declined_transaction.rbi
@@ -3371,6 +3371,13 @@ module Increase
                 Increase::DeclinedTransaction::Source::CheckDecline::Reason::TaggedSymbol
               )
 
+            # The check image is unusable.
+            UNUSABLE_IMAGE =
+              T.let(
+                :unusable_image,
+                Increase::DeclinedTransaction::Source::CheckDecline::Reason::TaggedSymbol
+              )
+
             # Your integration declined this check via the API.
             USER_INITIATED =
               T.let(
diff --git a/sig/increase/models/declined_transaction.rbs b/sig/increase/models/declined_transaction.rbs
index 73dbe42d2..6871d4ebf 100644
--- a/sig/increase/models/declined_transaction.rbs
+++ b/sig/increase/models/declined_transaction.rbs
@@ -1291,6 +1291,7 @@ module Increase
             | :no_account_number_found
             | :refer_to_image
             | :unable_to_process
+            | :unusable_image
             | :user_initiated
 
           module Reason
@@ -1344,6 +1345,9 @@ module Increase
             # The check cannot be processed. This is rare: please contact support.
             UNABLE_TO_PROCESS: :unable_to_process
 
+            # The check image is unusable.
+            UNUSABLE_IMAGE: :unusable_image
+
             # Your integration declined this check via the API.
             USER_INITIATED: :user_initiated