diff --git a/README.md b/README.md
index 9f4c2583..d9a588a4 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 ![catch logo](catch-logo-small.png)
 
-*v1.5.4*
+*v1.5.6*
 
 Build status (on Travis CI) [![Build Status](https://travis-ci.org/philsquared/Catch.png)](https://travis-ci.org/philsquared/Catch)
 
diff --git a/include/external/clara.h b/include/external/clara.h
index 6ab30136..369c1b76 100644
--- a/include/external/clara.h
+++ b/include/external/clara.h
@@ -589,7 +589,7 @@ namespace Clara {
             }
         }
         Mode handleOpt( std::size_t i, char c, std::string const& arg, std::vector<Token>& tokens ) {
-            if( std::string( ":=\0", 5 ).find( c ) == std::string::npos )
+            if( std::string( ":=\0", 3 ).find( c ) == std::string::npos )
                 return mode;
 
             std::string optName = arg.substr( from, i-from );
@@ -603,7 +603,7 @@ namespace Clara {
             return None;
         }
         Mode handlePositional( std::size_t i, char c, std::string const& arg, std::vector<Token>& tokens ) {
-            if( inQuotes || std::string( "\0", 3 ).find( c ) == std::string::npos )
+            if( inQuotes || std::string( "\0", 1 ).find( c ) == std::string::npos )
                 return mode;
 
             std::string data = arg.substr( from, i-from );
diff --git a/include/internal/catch_compiler_capabilities.h b/include/internal/catch_compiler_capabilities.h
index ed4aa52b..5af1e76a 100644
--- a/include/internal/catch_compiler_capabilities.h
+++ b/include/internal/catch_compiler_capabilities.h
@@ -36,8 +36,16 @@
 
 // All the C++11 features can be disabled with CATCH_CONFIG_NO_CPP11
 
-#if defined(__cplusplus) && __cplusplus >= 201103L
-#  define CATCH_CPP11_OR_GREATER
+#ifdef __cplusplus
+
+#  if __cplusplus >= 201103L
+#    define CATCH_CPP11_OR_GREATER
+#  endif
+
+#  if __cplusplus >= 201402L
+#    define CATCH_CPP14_OR_GREATER
+#  endif
+
 #endif
 
 #ifdef __clang__
diff --git a/include/internal/catch_config.hpp b/include/internal/catch_config.hpp
index 22a50d0c..cbeae147 100644
--- a/include/internal/catch_config.hpp
+++ b/include/internal/catch_config.hpp
@@ -157,7 +157,7 @@ namespace Catch {
         }
         ConfigData m_data;
 
-        std::auto_ptr<IStream const> m_stream;
+        CATCH_AUTO_PTR( IStream const ) m_stream;
         TestSpec m_testSpec;
     };
 
diff --git a/include/internal/catch_stream.h b/include/internal/catch_stream.h
index 5f22ad67..1bf5ee18 100644
--- a/include/internal/catch_stream.h
+++ b/include/internal/catch_stream.h
@@ -49,7 +49,7 @@ namespace Catch {
 
 
     class DebugOutStream : public IStream {
-        std::auto_ptr<StreamBufBase> m_streamBuf;
+        CATCH_AUTO_PTR( StreamBufBase ) m_streamBuf;
         mutable std::ostream m_os;
     public:
         DebugOutStream();
diff --git a/include/internal/catch_test_case_registry_impl.hpp b/include/internal/catch_test_case_registry_impl.hpp
index cc48d917..04bd37fc 100644
--- a/include/internal/catch_test_case_registry_impl.hpp
+++ b/include/internal/catch_test_case_registry_impl.hpp
@@ -19,13 +19,31 @@
 #include <iostream>
 #include <algorithm>
 
-namespace Catch {
+#ifdef CATCH_CPP14_OR_GREATER
+#include <random>
+#endif
 
-    struct LexSort {
-        bool operator() (TestCase i,TestCase j) const { return (i<j);}
-    };
+namespace Catch {
+    
     struct RandomNumberGenerator {
-        int operator()( int n ) const { return std::rand() % n; }
+        typedef int result_type;
+
+        result_type operator()( result_type n ) const { return std::rand() % n; }
+
+#ifdef CATCH_CPP14_OR_GREATER
+        static constexpr result_type min() { return 0; }
+        static constexpr result_type max() { return 1000000; }
+        result_type operator()() const { return std::rand() % max(); }
+#endif
+        template<typename V>
+        static void shuffle( V& vector ) {
+            RandomNumberGenerator rng;
+#ifdef CATCH_CPP14_OR_GREATER
+            std::shuffle( vector.begin(), vector.end(), rng );
+#else
+            std::random_shuffle( vector.begin(), vector.end(), rng );
+#endif
+        }
     };
 
     inline std::vector<TestCase> sortTests( IConfig const& config, std::vector<TestCase> const& unsortedTestCases ) {
@@ -34,14 +52,12 @@ namespace Catch {
 
         switch( config.runOrder() ) {
             case RunTests::InLexicographicalOrder:
-                std::sort( sorted.begin(), sorted.end(), LexSort() );
+                std::sort( sorted.begin(), sorted.end() );
                 break;
             case RunTests::InRandomOrder:
                 {
                     seedRng( config );
-
-                    RandomNumberGenerator rng;
-                    std::random_shuffle( sorted.begin(), sorted.end(), rng );
+                    RandomNumberGenerator::shuffle( sorted );
                 }
                 break;
             case RunTests::InDeclarationOrder:
diff --git a/include/internal/catch_version.hpp b/include/internal/catch_version.hpp
index 35997681..ad9322ef 100644
--- a/include/internal/catch_version.hpp
+++ b/include/internal/catch_version.hpp
@@ -37,7 +37,7 @@ namespace Catch {
         return os;
     }
 
-    Version libraryVersion( 1, 5, 4, "", 0 );
+    Version libraryVersion( 1, 5, 6, "", 0 );
 
 }
 
diff --git a/single_include/catch.hpp b/single_include/catch.hpp
index 7df2fd09..879fc5b1 100644
--- a/single_include/catch.hpp
+++ b/single_include/catch.hpp
@@ -1,6 +1,6 @@
 /*
- *  Catch v1.5.4
- *  Generated: 2016-05-12 19:16:01.957320
+ *  Catch v1.5.6
+ *  Generated: 2016-06-09 19:20:41.460328
  *  ----------------------------------------------------------
  *  This file has been merged from multiple headers. Please don't edit it directly
  *  Copyright (c) 2012 Two Blue Cubes Ltd. All rights reserved.
@@ -106,8 +106,16 @@
 
 // All the C++11 features can be disabled with CATCH_CONFIG_NO_CPP11
 
-#if defined(__cplusplus) && __cplusplus >= 201103L
-#  define CATCH_CPP11_OR_GREATER
+#ifdef __cplusplus
+
+#  if __cplusplus >= 201103L
+#    define CATCH_CPP11_OR_GREATER
+#  endif
+
+#  if __cplusplus >= 201402L
+#    define CATCH_CPP14_OR_GREATER
+#  endif
+
 #endif
 
 #ifdef __clang__
@@ -3450,7 +3458,7 @@ namespace Catch {
     };
 
     class DebugOutStream : public IStream {
-        std::auto_ptr<StreamBufBase> m_streamBuf;
+        CATCH_AUTO_PTR( StreamBufBase ) m_streamBuf;
         mutable std::ostream m_os;
     public:
         DebugOutStream();
@@ -3598,7 +3606,7 @@ namespace Catch {
         }
         ConfigData m_data;
 
-        std::auto_ptr<IStream const> m_stream;
+        CATCH_AUTO_PTR( IStream const ) m_stream;
         TestSpec m_testSpec;
     };
 
@@ -4177,7 +4185,7 @@ namespace Clara {
             }
         }
         Mode handleOpt( std::size_t i, char c, std::string const& arg, std::vector<Token>& tokens ) {
-            if( std::string( ":=\0", 5 ).find( c ) == std::string::npos )
+            if( std::string( ":=\0", 3 ).find( c ) == std::string::npos )
                 return mode;
 
             std::string optName = arg.substr( from, i-from );
@@ -4191,7 +4199,7 @@ namespace Clara {
             return None;
         }
         Mode handlePositional( std::size_t i, char c, std::string const& arg, std::vector<Token>& tokens ) {
-            if( inQuotes || std::string( "\0", 3 ).find( c ) == std::string::npos )
+            if( inQuotes || std::string( "\0", 1 ).find( c ) == std::string::npos )
                 return mode;
 
             std::string data = arg.substr( from, i-from );
@@ -6439,13 +6447,31 @@ namespace Catch {
 #include <iostream>
 #include <algorithm>
 
+#ifdef CATCH_CPP14_OR_GREATER
+#include <random>
+#endif
+
 namespace Catch {
 
-    struct LexSort {
-        bool operator() (TestCase i,TestCase j) const { return (i<j);}
-    };
     struct RandomNumberGenerator {
-        int operator()( int n ) const { return std::rand() % n; }
+        typedef int result_type;
+
+        result_type operator()( result_type n ) const { return std::rand() % n; }
+
+#ifdef CATCH_CPP14_OR_GREATER
+        static constexpr result_type min() { return 0; }
+        static constexpr result_type max() { return 1000000; }
+        result_type operator()() const { return std::rand() % max(); }
+#endif
+        template<typename V>
+        static void shuffle( V& vector ) {
+            RandomNumberGenerator rng;
+#ifdef CATCH_CPP14_OR_GREATER
+            std::shuffle( vector.begin(), vector.end(), rng );
+#else
+            std::random_shuffle( vector.begin(), vector.end(), rng );
+#endif
+        }
     };
 
     inline std::vector<TestCase> sortTests( IConfig const& config, std::vector<TestCase> const& unsortedTestCases ) {
@@ -6454,14 +6480,12 @@ namespace Catch {
 
         switch( config.runOrder() ) {
             case RunTests::InLexicographicalOrder:
-                std::sort( sorted.begin(), sorted.end(), LexSort() );
+                std::sort( sorted.begin(), sorted.end() );
                 break;
             case RunTests::InRandomOrder:
                 {
                     seedRng( config );
-
-                    RandomNumberGenerator rng;
-                    std::random_shuffle( sorted.begin(), sorted.end(), rng );
+                    RandomNumberGenerator::shuffle( sorted );
                 }
                 break;
             case RunTests::InDeclarationOrder:
@@ -7547,7 +7571,7 @@ namespace Catch {
         return os;
     }
 
-    Version libraryVersion( 1, 5, 4, "", 0 );
+    Version libraryVersion( 1, 5, 6, "", 0 );
 
 }