diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2cac978..25af123 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -12,6 +12,8 @@ OPTION(JSONCPP_WITH_CMAKE_PACKAGE "Generate and install cmake package files" OFF
 OPTION(BUILD_SHARED_LIBS "Build jsoncpp_lib as a shared library." OFF)
 OPTION(BUILD_STATIC_LIBS "Build jsoncpp_lib static library." ON)
 
+include(GNUInstallDirs)
+
 # Ensures that CMAKE_BUILD_TYPE is visible in cmake-gui on Unix
 IF(NOT WIN32)
     IF(NOT CMAKE_BUILD_TYPE)
@@ -30,7 +32,7 @@ SET(ARCHIVE_INSTALL_DIR ${CMAKE_INSTALL_PREFIX}/lib${LIB_SUFFIX}
     CACHE PATH "Install dir for static libraries")
 SET(LIBRARY_INSTALL_DIR ${CMAKE_INSTALL_PREFIX}/lib${LIB_SUFFIX}
     CACHE PATH "Install dir for shared libraries")
-SET(INCLUDE_INSTALL_DIR ${CMAKE_INSTALL_PREFIX}/include
+SET(INCLUDE_INSTALL_DIR ${CMAKE_INSTALL_PREFIX}/include/jsoncpp
     CACHE PATH "Install dir for headers")
 SET(PACKAGE_INSTALL_DIR lib${LIB_SUFFIX}/cmake
     CACHE PATH "Install dir for cmake package config files")
@@ -114,7 +116,7 @@ IF(JSONCPP_WITH_PKGCONFIG_SUPPORT)
 		"pkg-config/jsoncpp.pc"
 		@ONLY)
 	INSTALL(FILES "${CMAKE_BINARY_DIR}/pkg-config/jsoncpp.pc"
-		DESTINATION "${CMAKE_INSTALL_PREFIX}/lib${LIB_SUFFIX}/pkgconfig")
+        DESTINATION "${CMAKE_INSTALL_LIBDIR}/pkgconfig")
 ENDIF()
 
 IF(JSONCPP_WITH_CMAKE_PACKAGE)
diff --git a/src/lib_json/CMakeLists.txt b/src/lib_json/CMakeLists.txt
index 99ddc7f..5861f03 100644
--- a/src/lib_json/CMakeLists.txt
+++ b/src/lib_json/CMakeLists.txt
@@ -48,8 +48,8 @@ IF(BUILD_SHARED_LIBS)
 
     INSTALL( TARGETS jsoncpp_lib ${INSTALL_EXPORT}
          RUNTIME DESTINATION ${RUNTIME_INSTALL_DIR}
-         LIBRARY DESTINATION ${LIBRARY_INSTALL_DIR}
-         ARCHIVE DESTINATION ${ARCHIVE_INSTALL_DIR})
+         LIBRARY DESTINATION "${LIBRARY_INSTALL_DIR}/${CMAKE_LIBRARY_ARCHITECTURE}"
+         ARCHIVE DESTINATION "${ARCHIVE_INSTALL_DIR}/${CMAKE_LIBRARY_ARCHITECTURE}")
 
     IF(NOT CMAKE_VERSION VERSION_LESS 2.8.11)
         TARGET_INCLUDE_DIRECTORIES( jsoncpp_lib PUBLIC
@@ -67,8 +67,8 @@ IF(BUILD_STATIC_LIBS)
 
     INSTALL( TARGETS jsoncpp_lib_static ${INSTALL_EXPORT}
          RUNTIME DESTINATION ${RUNTIME_INSTALL_DIR}
-         LIBRARY DESTINATION ${LIBRARY_INSTALL_DIR}
-             ARCHIVE DESTINATION ${ARCHIVE_INSTALL_DIR})
+         LIBRARY DESTINATION "${LIBRARY_INSTALL_DIR}/${CMAKE_LIBRARY_ARCHITECTURE}"
+         ARCHIVE DESTINATION "${ARCHIVE_INSTALL_DIR}/${CMAKE_LIBRARY_ARCHITECTURE}")
 
     IF(NOT CMAKE_VERSION VERSION_LESS 2.8.11)
         TARGET_INCLUDE_DIRECTORIES( jsoncpp_lib_static PUBLIC
diff --git a/src/lib_json/json_reader.cpp b/src/lib_json/json_reader.cpp
index 53528f2..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
 // ////////////////////////////////
@@ -1477,33 +1481,9 @@ bool OurReader::decodeDouble(Token& token) {
 
 bool OurReader::decodeDouble(Token& token, Value& decoded) {
   double value = 0;
-  const int bufferSize = 32;
-  int count;
-  int length = int(token.end_ - token.start_);
-
-  // Sanity check to avoid buffer overflow exploits.
-  if (length < 0) {
-    return addError("Unable to parse token length", token);
-  }
-
-  // Avoid using a string constant for the format control string given to
-  // sscanf, as this can cause hard to debug crashes on OS X. See here for more
-  // info:
-  //
-  //     http://developer.apple.com/library/mac/#DOCUMENTATION/DeveloperTools/gcc-4.0.1/gcc/Incompatibilities.html
-  char format[] = "%lf";
-
-  if (length <= bufferSize) {
-    Char buffer[bufferSize + 1];
-    memcpy(buffer, token.start_, length);
-    buffer[length] = 0;
-    count = sscanf(buffer, format, &value);
-  } else {
-    std::string buffer(token.start_, token.end_);
-    count = sscanf(buffer.c_str(), format, &value);
-  }
-
-  if (count != 1)
+  std::string buffer( token.start_, token.end_ );
+  std::istringstream is(buffer);
+  if (!(is >> value))
     return addError("'" + std::string(token.start_, token.end_) +
                         "' is not a number.",
                     token);
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) {