diff --git a/lib/rspec_api_documentation/curl.rb b/lib/rspec_api_documentation/curl.rb
index 817c4f19..09eea076 100644
--- a/lib/rspec_api_documentation/curl.rb
+++ b/lib/rspec_api_documentation/curl.rb
@@ -69,7 +69,12 @@ def format_header(header)
     end
 
     def format_full_header(header, value)
-      formatted_value = value ? value.gsub(/"/, "\\\"") : ''
+      formatted_value = if value.is_a?(Numeric)
+        value
+      else
+        value ? value.gsub(/"/, "\\\"") : ''
+      end
+
       "#{format_header(header)}: #{formatted_value}"
     end