diff --git a/lib/serializer/Connection.cpp b/lib/serializer/Connection.cpp
index 0a842d1d3..ae1810e8b 100644
--- a/lib/serializer/Connection.cpp
+++ b/lib/serializer/Connection.cpp
@@ -14,6 +14,9 @@
 #include "../mapping/CMap.h"
 #include "../CGameState.h"
 
+#if BOOST_VERSION >= 106600
+#define BOOST_ASIO_ENABLE_OLD_SERVICES
+#endif
 #include <boost/asio.hpp>
 
 using namespace boost;
diff --git a/lib/serializer/Connection.h b/lib/serializer/Connection.h
index b6ceee7a0..cb134e2b6 100644
--- a/lib/serializer/Connection.h
+++ b/lib/serializer/Connection.h
@@ -22,7 +22,13 @@ namespace boost
 		{
 			class tcp;
 		}
+
+#if BOOST_VERSION >= 106600  // Boost version >= 1.66
+		class io_context;
+		typedef io_context io_service;
+#else
 		class io_service;
+#endif
 
 		template <typename Protocol> class stream_socket_service;
 		template <typename Protocol,typename StreamSocketService>
diff --git a/server/CVCMIServer.cpp b/server/CVCMIServer.cpp
index b077607be..d459a8e95 100644
--- a/server/CVCMIServer.cpp
+++ b/server/CVCMIServer.cpp
@@ -9,6 +9,9 @@
  */
 #include "StdInc.h"
 
+#if BOOST_VERSION >= 106600
+#define BOOST_ASIO_ENABLE_OLD_SERVICES
+#endif
 #include <boost/asio.hpp>
 
 #include "../lib/filesystem/Filesystem.h"
diff --git a/server/CVCMIServer.h b/server/CVCMIServer.h
index 6fa7ad5bb..ad9951f64 100644
--- a/server/CVCMIServer.h
+++ b/server/CVCMIServer.h
@@ -26,7 +26,13 @@ namespace boost
 		{
 			class tcp;
 		}
-		class io_service;
+
+#if BOOST_VERSION >= 106600  // Boost version >= 1.66
+		class io_context;
+		typedef io_context io_service;
+#else
+		class io_service;
+#endif
 
 		template <typename Protocol> class stream_socket_service;
 		template <typename Protocol,typename StreamSocketService>