diff --git a/README.md b/README.md
index 71bb5b2..7338db2 100644
--- a/README.md
+++ b/README.md
@@ -75,6 +75,9 @@ TestsDoc.configure do |config|
   # Folder name where the tests doc will be stored
   config.doc_folder  = 'api' # default: api
 
+  # Key separator between the path and the key
+  config.key_separator = '@' # default: @
+
   # Add RSpec line number to the test doc
   config.add_spec_file_number = false # default: true
 
diff --git a/lib/tests_doc/configuration.rb b/lib/tests_doc/configuration.rb
index e998420..5d2ee8b 100644
--- a/lib/tests_doc/configuration.rb
+++ b/lib/tests_doc/configuration.rb
@@ -20,6 +20,7 @@ def self.config(property, default = nil)
     config :changes_whitelist_regexes, []
     config :root_folder, "tests-doc"
     config :doc_folder, "api"
+    config :key_separator, "@"
   end
 
 end
diff --git a/lib/tests_doc/interaction.rb b/lib/tests_doc/interaction.rb
index 2e87b6f..952da5e 100644
--- a/lib/tests_doc/interaction.rb
+++ b/lib/tests_doc/interaction.rb
@@ -51,7 +51,7 @@ def response_content
       end
 
       def file_path
-        [file_base_path, options.key.to_s].reject(&:blank?).compact.join('@') + '.md'
+        [file_base_path, options.key.to_s].reject(&:blank?).compact.join(TestsDoc.configuration.key_separator) + '.md'
       end
 
       def file_base_path