diff --git a/include/inja/environment.hpp b/include/inja/environment.hpp
index 9aa52ee..86db816 100644
--- a/include/inja/environment.hpp
+++ b/include/inja/environment.hpp
@@ -21,9 +21,6 @@ namespace inja {
  * \brief Class for changing the configuration.
  */
 class Environment {
-  std::string input_path;
-  std::string output_path;
-
   LexerConfig lexer_config;
   ParserConfig parser_config;
   RenderConfig render_config;
@@ -31,6 +28,10 @@ class Environment {
   FunctionStorage function_storage;
   TemplateStorage template_storage;
 
+protected:
+  std::string input_path;
+  std::string output_path;
+
 public:
   Environment(): Environment("") {}
 
diff --git a/single_include/inja/inja.hpp b/single_include/inja/inja.hpp
index 5b46974..c64405a 100644
--- a/single_include/inja/inja.hpp
+++ b/single_include/inja/inja.hpp
@@ -2723,9 +2723,6 @@ namespace inja {
  * \brief Class for changing the configuration.
  */
 class Environment {
-  std::string input_path;
-  std::string output_path;
-
   LexerConfig lexer_config;
   ParserConfig parser_config;
   RenderConfig render_config;
@@ -2733,6 +2730,10 @@ class Environment {
   FunctionStorage function_storage;
   TemplateStorage template_storage;
 
+protected:
+  std::string input_path;
+  std::string output_path;
+
 public:
   Environment(): Environment("") {}