diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index f1ce3b3..074dfc8 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "2.11.2"
+  ".": "2.11.3"
 }
\ No newline at end of file
diff --git a/.stats.yml b/.stats.yml
index f17b8ce..188067d 100644
--- a/.stats.yml
+++ b/.stats.yml
@@ -1,4 +1,4 @@
 configured_endpoints: 27
 openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/moderation-api%2Fmoderation-api-a4934bf1e7f1348c021b48224f7a7110a6e41838253dda4fbcc720dd2d2ed6b7.yml
 openapi_spec_hash: 537542216811907b1d4ebf23a54dc669
-config_hash: 6b825a08e19dfb747c5dc1766502b789
+config_hash: 0a024bca1710e3a3194925edfedc513c
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6aa9529..17a05b8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 # Changelog
 
+## 2.11.3 (2026-04-09)
+
+Full Changelog: [v2.11.2...v2.11.3](https://github.com/moderation-api/sdk-ruby/compare/v2.11.2...v2.11.3)
+
+### Bug Fixes
+
+* multipart encoding for file arrays ([7480479](https://github.com/moderation-api/sdk-ruby/commit/748047916ff78fc154b75fb4415fe6b06856bfde))
+
 ## 2.11.2 (2026-04-01)
 
 Full Changelog: [v2.11.1...v2.11.2](https://github.com/moderation-api/sdk-ruby/compare/v2.11.1...v2.11.2)
diff --git a/Gemfile.lock b/Gemfile.lock
index 40db1b9..8eb6062 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -11,7 +11,7 @@ GIT
 PATH
   remote: .
   specs:
-    moderation_api (2.11.2)
+    moderation_api (2.11.3)
       cgi
       connection_pool
 
diff --git a/README.md b/README.md
index b9e6585..05a9a8a 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 "moderation_api", "~> 2.11.2"
+gem "moderation_api", "~> 2.11.3"
 ```
 
 <!-- x-release-please-end -->
diff --git a/lib/moderation_api/internal/util.rb b/lib/moderation_api/internal/util.rb
index 382526b..4a98a13 100644
--- a/lib/moderation_api/internal/util.rb
+++ b/lib/moderation_api/internal/util.rb
@@ -610,6 +610,7 @@ def encode_query_params(query)
         #
         # @return [Array(String, Enumerable<String>)]
         private def encode_multipart_streaming(body)
+          # rubocop:disable Style/CaseEquality
           # RFC 1521 Section 7.2.1 says we should have 70 char maximum for boundary length
           boundary = SecureRandom.urlsafe_base64(46)
 
@@ -619,7 +620,7 @@ def encode_query_params(query)
             in Hash
               body.each do |key, val|
                 case val
-                in Array if val.all? { primitive?(_1) }
+                in Array if val.all? { primitive?(_1) || ModerationAPI::Internal::Type::FileInput === _1 }
                   val.each do |v|
                     write_multipart_chunk(y, boundary: boundary, key: key, val: v, closing: closing)
                   end
@@ -635,6 +636,7 @@ def encode_query_params(query)
 
           fused_io = fused_enum(strio) { closing.each(&:call) }
           [boundary, fused_io]
+          # rubocop:enable Style/CaseEquality
         end
 
         # @api private
diff --git a/lib/moderation_api/version.rb b/lib/moderation_api/version.rb
index 86d149a..d956e88 100644
--- a/lib/moderation_api/version.rb
+++ b/lib/moderation_api/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module ModerationAPI
-  VERSION = "2.11.2"
+  VERSION = "2.11.3"
 end