From 5cb2c65146a070d5ecbe1e459858669e598449ad Mon Sep 17 00:00:00 2001
From: "stainless-app[bot]"
 <142633134+stainless-app[bot]@users.noreply.github.com>
Date: Fri, 26 Sep 2025 15:37:40 +0000
Subject: [PATCH 1/2] fix: shorten multipart boundary sep to less than RFC
 specificed max length

---
 lib/increase/internal/util.rb       |  3 ++-
 test/increase/internal/util_test.rb | 12 ++++++++++++
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/lib/increase/internal/util.rb b/lib/increase/internal/util.rb
index acece214d..7dbbd9c03 100644
--- a/lib/increase/internal/util.rb
+++ b/lib/increase/internal/util.rb
@@ -566,7 +566,8 @@ class << self
         #
         # @return [Array(String, Enumerable<String>)]
         private def encode_multipart_streaming(body)
-          boundary = SecureRandom.urlsafe_base64(60)
+          # RFC 1521 Section 7.2.1 says we should have 70 char maximum for boundary length
+          boundary = SecureRandom.urlsafe_base64(46)
 
           closing = []
           strio = writable_enum do |y|
diff --git a/test/increase/internal/util_test.rb b/test/increase/internal/util_test.rb
index 852f13cc9..fb5434203 100644
--- a/test/increase/internal/util_test.rb
+++ b/test/increase/internal/util_test.rb
@@ -213,6 +213,18 @@ def env_table
     end
   end
 
+  def test_encoding_length
+    headers, = Increase::Internal::Util.encode_content(
+      {"content-type" => "multipart/form-data"},
+      Pathname(__FILE__)
+    )
+    assert_pattern do
+      headers.fetch("content-type") => /boundary=(.+)$/
+    end
+    field, = Regexp.last_match.captures
+    assert(field.length < 70 - 6)
+  end
+
   def test_file_encode
     file = Pathname(__FILE__)
     headers = {"content-type" => "multipart/form-data"}

From 8ff3bd6be245ff79327fc2f1e134cbe3972672cf Mon Sep 17 00:00:00 2001
From: "stainless-app[bot]"
 <142633134+stainless-app[bot]@users.noreply.github.com>
Date: Fri, 26 Sep 2025 15:38:01 +0000
Subject: [PATCH 2/2] release: 1.91.1

---
 .release-please-manifest.json | 2 +-
 CHANGELOG.md                  | 8 ++++++++
 Gemfile.lock                  | 2 +-
 README.md                     | 2 +-
 lib/increase/version.rb       | 2 +-
 5 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index f18270d52..bdd1880da 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "1.91.0"
+  ".": "1.91.1"
 }
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4df261628..7af5961e3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 # Changelog
 
+## 1.91.1 (2025-09-26)
+
+Full Changelog: [v1.91.0...v1.91.1](https://github.com/Increase/increase-ruby/compare/v1.91.0...v1.91.1)
+
+### Bug Fixes
+
+* shorten multipart boundary sep to less than RFC specificed max length ([5cb2c65](https://github.com/Increase/increase-ruby/commit/5cb2c65146a070d5ecbe1e459858669e598449ad))
+
 ## 1.91.0 (2025-09-26)
 
 Full Changelog: [v1.90.0...v1.91.0](https://github.com/Increase/increase-ruby/compare/v1.90.0...v1.91.0)
diff --git a/Gemfile.lock b/Gemfile.lock
index 90c6a124a..c7172b3e3 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -11,7 +11,7 @@ GIT
 PATH
   remote: .
   specs:
-    increase (1.91.0)
+    increase (1.91.1)
       connection_pool
 
 GEM
diff --git a/README.md b/README.md
index 053858432..976db60e5 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", "~> 1.91.0"
+gem "increase", "~> 1.91.1"
 ```
 
 <!-- x-release-please-end -->
diff --git a/lib/increase/version.rb b/lib/increase/version.rb
index 819a213d6..2291ed6ec 100644
--- a/lib/increase/version.rb
+++ b/lib/increase/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module Increase
-  VERSION = "1.91.0"
+  VERSION = "1.91.1"
 end