diff --git a/CHANGELOG.md b/CHANGELOG.md
index d71fedbda..c97449575 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,4 @@
-# 9.14.0 - TBD
+# 9.14.0 - 2024-09-23
 
 ## Enhancements
 
@@ -6,6 +6,8 @@
 - Add support for defining custom validation blocks in configuration
   - [672](https://github.com/bugsnag/maze-runner/pull/672)
   - [675](https://github.com/bugsnag/maze-runner/pull/675)
+  - [677](https://github.com/bugsnag/maze-runner/pull/677)
+- Add client mode configuration option [677](https://github.com/bugsnag/maze-runner/pull/677)
 
 # 9.13.1 - 2024-08-30
 
diff --git a/lib/maze/configuration.rb b/lib/maze/configuration.rb
index 6789d1a94..668d74608 100644
--- a/lib/maze/configuration.rb
+++ b/lib/maze/configuration.rb
@@ -14,6 +14,7 @@ def initialize
       self.android_app_files_directory = nil
       self.span_timestamp_validation = true
       self.unmanaged_traces_mode = false
+      self.client_mode_validation = true
       @legacy_driver = false
     end
 
diff --git a/lib/maze/schemas/trace_validator.rb b/lib/maze/schemas/trace_validator.rb
index 345e43b76..045e98238 100644
--- a/lib/maze/schemas/trace_validator.rb
+++ b/lib/maze/schemas/trace_validator.rb
@@ -34,7 +34,7 @@ def validate
           'resourceSpans.0.scopeSpans.0.spans.0.startTimeUnixNano'
         )
 
-        unless Maze.config.client_mode_validation
+        if Maze.config.client_mode_validation
           span_element_contains('resourceSpans.0.resource.attributes', 'device.id')
         end
       end