From d78df6ce7d11866bc5f8ad6f8ba80813fd63bd79 Mon Sep 17 00:00:00 2001
From: "stainless-app[bot]"
 <142633134+stainless-app[bot]@users.noreply.github.com>
Date: Tue, 31 Mar 2026 20:50:19 +0000
Subject: [PATCH 1/2] fix: align path encoding with RFC 3986 section 3.3

---
 lib/increase/internal/util.rb  | 20 +++++++++++++++++---
 rbi/increase/internal/util.rbi |  8 ++++++++
 sig/increase/internal/util.rbs |  4 ++++
 3 files changed, 29 insertions(+), 3 deletions(-)

diff --git a/lib/increase/internal/util.rb b/lib/increase/internal/util.rb
index d5fb98ec..c5eff645 100644
--- a/lib/increase/internal/util.rb
+++ b/lib/increase/internal/util.rb
@@ -237,6 +237,11 @@ def dig(data, pick, &blk)
         end
       end
 
+      # @type [Regexp]
+      #
+      # https://www.rfc-editor.org/rfc/rfc3986.html#section-3.3
+      RFC_3986_NOT_PCHARS = /[^A-Za-z0-9\-._~!$&'()*+,;=:@]+/
+
       class << self
         # @api private
         #
@@ -247,6 +252,15 @@ def uri_origin(uri)
           "#{uri.scheme}://#{uri.host}#{":#{uri.port}" unless uri.port == uri.default_port}"
         end
 
+        # @api private
+        #
+        # @param path [String, Integer]
+        #
+        # @return [String]
+        def encode_path(path)
+          path.to_s.gsub(Increase::Internal::Util::RFC_3986_NOT_PCHARS) { ERB::Util.url_encode(_1) }
+        end
+
         # @api private
         #
         # @param path [String, Array<String>]
@@ -259,7 +273,7 @@ def interpolate_path(path)
           in []
             ""
           in [String => p, *interpolations]
-            encoded = interpolations.map { ERB::Util.url_encode(_1) }
+            encoded = interpolations.map { encode_path(_1) }
             format(p, *encoded)
           end
         end
@@ -576,10 +590,10 @@ def encode_query_params(query)
 
           case val
           in Increase::FilePart unless val.filename.nil?
-            filename = ERB::Util.url_encode(val.filename)
+            filename = encode_path(val.filename)
             y << "; filename=\"#{filename}\""
           in Pathname | IO
-            filename = ERB::Util.url_encode(::File.basename(val.to_path))
+            filename = encode_path(::File.basename(val.to_path))
             y << "; filename=\"#{filename}\""
           else
           end
diff --git a/rbi/increase/internal/util.rbi b/rbi/increase/internal/util.rbi
index f5d9a4bf..252dc60c 100644
--- a/rbi/increase/internal/util.rbi
+++ b/rbi/increase/internal/util.rbi
@@ -148,12 +148,20 @@ module Increase
         end
       end
 
+      # https://www.rfc-editor.org/rfc/rfc3986.html#section-3.3
+      RFC_3986_NOT_PCHARS = T.let(/[^A-Za-z0-9\-._~!$&'()*+,;=:@]+/, Regexp)
+
       class << self
         # @api private
         sig { params(uri: URI::Generic).returns(String) }
         def uri_origin(uri)
         end
 
+        # @api private
+        sig { params(path: T.any(String, Integer)).returns(String) }
+        def encode_path(path)
+        end
+
         # @api private
         sig { params(path: T.any(String, T::Array[String])).returns(String) }
         def interpolate_path(path)
diff --git a/sig/increase/internal/util.rbs b/sig/increase/internal/util.rbs
index cd751259..a30be396 100644
--- a/sig/increase/internal/util.rbs
+++ b/sig/increase/internal/util.rbs
@@ -45,8 +45,12 @@ module Increase
         -> top?
       } -> top?
 
+      RFC_3986_NOT_PCHARS: Regexp
+
       def self?.uri_origin: (URI::Generic uri) -> String
 
+      def self?.encode_path: (String | Integer path) -> String
+
       def self?.interpolate_path: (String | ::Array[String] path) -> String
 
       def self?.decode_query: (String? query) -> ::Hash[String, ::Array[String]]

From 43dc169ac94ee7602cb3cd488274c1176e7dab8a Mon Sep 17 00:00:00 2001
From: "stainless-app[bot]"
 <142633134+stainless-app[bot]@users.noreply.github.com>
Date: Tue, 31 Mar 2026 20:50:42 +0000
Subject: [PATCH 2/2] release: 1.278.2

---
 .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 f1ce00f2..14b0e6b2 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "1.278.1"
+  ".": "1.278.2"
 }
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index f41201c5..57adfae0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 # Changelog
 
+## 1.278.2 (2026-03-31)
+
+Full Changelog: [v1.278.1...v1.278.2](https://github.com/Increase/increase-ruby/compare/v1.278.1...v1.278.2)
+
+### Bug Fixes
+
+* align path encoding with RFC 3986 section 3.3 ([d78df6c](https://github.com/Increase/increase-ruby/commit/d78df6ce7d11866bc5f8ad6f8ba80813fd63bd79))
+
 ## 1.278.1 (2026-03-31)
 
 Full Changelog: [v1.278.0...v1.278.1](https://github.com/Increase/increase-ruby/compare/v1.278.0...v1.278.1)
diff --git a/Gemfile.lock b/Gemfile.lock
index 62b329a0..5f3fb308 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -11,7 +11,7 @@ GIT
 PATH
   remote: .
   specs:
-    increase (1.278.1)
+    increase (1.278.2)
       cgi
       connection_pool
       standardwebhooks
diff --git a/README.md b/README.md
index 670f1564..b838cfce 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", "~> 1.278.1"
+gem "increase", "~> 1.278.2"
 ```
 
 <!-- x-release-please-end -->
diff --git a/lib/increase/version.rb b/lib/increase/version.rb
index c81a5ff6..4bbf8e27 100644
--- a/lib/increase/version.rb
+++ b/lib/increase/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module Increase
-  VERSION = "1.278.1"
+  VERSION = "1.278.2"
 end