diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index b23f23d..d139eec 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "0.10.5"
+  ".": "0.10.6"
 }
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9e29396..09b15ad 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 # Changelog
 
+## 0.10.6 (2026-02-07)
+
+Full Changelog: [v0.10.5...v0.10.6](https://github.com/openlayer-ai/openlayer-ruby/compare/v0.10.5...v0.10.6)
+
+### Bug Fixes
+
+* **client:** loosen json header parsing ([65e7b42](https://github.com/openlayer-ai/openlayer-ruby/commit/65e7b425df42b9c0a50bae22c71de4d2fad4a51a))
+
 ## 0.10.5 (2026-02-04)
 
 Full Changelog: [v0.10.4...v0.10.5](https://github.com/openlayer-ai/openlayer-ruby/compare/v0.10.4...v0.10.5)
diff --git a/Gemfile.lock b/Gemfile.lock
index ecf859e..3d09063 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -11,7 +11,7 @@ GIT
 PATH
   remote: .
   specs:
-    openlayer (0.10.5)
+    openlayer (0.10.6)
       cgi
       connection_pool
 
diff --git a/README.md b/README.md
index eec3c2e..77543d0 100644
--- a/README.md
+++ b/README.md
@@ -17,7 +17,7 @@ To use this gem, install via Bundler by adding the following to your application
 <!-- x-release-please-start-version -->
 
 ```ruby
-gem "openlayer", "~> 0.10.5"
+gem "openlayer", "~> 0.10.6"
 ```
 
 <!-- x-release-please-end -->
diff --git a/lib/openlayer/internal/util.rb b/lib/openlayer/internal/util.rb
index b57a2fc..44e3213 100644
--- a/lib/openlayer/internal/util.rb
+++ b/lib/openlayer/internal/util.rb
@@ -485,7 +485,7 @@ def writable_enum(&blk)
       end
 
       # @type [Regexp]
-      JSON_CONTENT = %r{^application/(?:vnd(?:\.[^.]+)*\+)?json(?!l)}
+      JSON_CONTENT = %r{^application/(?:[a-zA-Z0-9.-]+\+)?json(?!l)}
       # @type [Regexp]
       JSONL_CONTENT = %r{^application/(:?x-(?:n|l)djson)|(:?(?:x-)?jsonl)}
 
diff --git a/lib/openlayer/version.rb b/lib/openlayer/version.rb
index d1f54dc..03a48be 100644
--- a/lib/openlayer/version.rb
+++ b/lib/openlayer/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module Openlayer
-  VERSION = "0.10.5"
+  VERSION = "0.10.6"
 end
diff --git a/rbi/openlayer/internal/util.rbi b/rbi/openlayer/internal/util.rbi
index b8b6198..e44397b 100644
--- a/rbi/openlayer/internal/util.rbi
+++ b/rbi/openlayer/internal/util.rbi
@@ -296,7 +296,7 @@ module Openlayer
       end
 
       JSON_CONTENT =
-        T.let(%r{^application/(?:vnd(?:\.[^.]+)*\+)?json(?!l)}, Regexp)
+        T.let(%r{^application/(?:[a-zA-Z0-9.-]+\+)?json(?!l)}, Regexp)
       JSONL_CONTENT =
         T.let(%r{^application/(:?x-(?:n|l)djson)|(:?(?:x-)?jsonl)}, Regexp)
 
diff --git a/test/openlayer/internal/util_test.rb b/test/openlayer/internal/util_test.rb
index 6c99d2f..b71a7b6 100644
--- a/test/openlayer/internal/util_test.rb
+++ b/test/openlayer/internal/util_test.rb
@@ -171,6 +171,8 @@ def test_json_content
     cases = {
       "application/json" => true,
       "application/jsonl" => false,
+      "application/arbitrary+json" => true,
+      "application/ARBITRARY+json" => true,
       "application/vnd.github.v3+json" => true,
       "application/vnd.api+json" => true
     }