diff --git a/src/lib_json/json_reader.cpp b/src/lib_json/json_reader.cpp
index a32d184..290e0b1 100644
--- a/src/lib_json/json_reader.cpp
+++ b/src/lib_json/json_reader.cpp
@@ -43,7 +43,11 @@ static int       stackDepth_g = 0;  // see readValue()
 
 namespace Json {
 
-typedef std::auto_ptr<CharReader>   CharReaderPtr;
+#if __GNUC__ >= 6
+typedef std::scoped_ptr<CharReader> const  CharReaderPtr;
+#else
+typedef std::auto_ptr<CharReader>          CharReaderPtr;
+#endif
 
 // Implementation of class Features
 // ////////////////////////////////
diff --git a/src/lib_json/json_writer.cpp b/src/lib_json/json_writer.cpp
index 892fb37..9b51e5a 100644
--- a/src/lib_json/json_writer.cpp
+++ b/src/lib_json/json_writer.cpp
@@ -54,7 +54,11 @@
 
 namespace Json {
 
-typedef std::auto_ptr<StreamWriter>   StreamWriterPtr;
+#if __GNUC__ >= 6
+typedef std::scoped_ptr<StreamWriter> const  StreamWriterPtr;
+#else
+typedef std::auto_ptr<StreamWriter>          StreamWriterPtr;
+#endif
 
 static bool containsControlCharacter(const char* str) {
   while (*str) {