diff --git a/lib/rack/pact_broker/request_target.rb b/lib/rack/pact_broker/request_target.rb
index edf3a82d0..d24d01f07 100644
--- a/lib/rack/pact_broker/request_target.rb
+++ b/lib/rack/pact_broker/request_target.rb
@@ -6,7 +6,7 @@ module RequestTarget
       extend self
 
       WEB_ASSET_EXTENSIONS = %w[.js .woff .woff2 .css .png .html .map .ttf .ico].freeze
-      API_CONTENT_TYPES = %w[application/hal+json application/json text/csv application/yaml].freeze
+      API_CONTENT_TYPES = %w[application/hal+json application/json text/csv application/yaml text/plain].freeze
 
       def request_for_ui?(env)
         !(request_for_api?(env))