diff --git a/include/opc/ua/services/services.h b/include/opc/ua/services/services.h
index f138831..4732a59 100644
--- a/include/opc/ua/services/services.h
+++ b/include/opc/ua/services/services.h
@@ -26,20 +26,7 @@
 #include <vector>
 
 #include <boost/version.hpp>
-
-
-namespace boost
-{
-namespace asio
-{
-#if BOOST_VERSION < 106600
-  class io_service;
-#else
-  class io_context;
-  typedef io_context io_service;
-#endif
-}
-}
+#include <boost/asio/io_service.hpp>
 
 namespace OpcUa
 {
diff --git a/src/server/internal_subscription.cpp b/src/server/internal_subscription.cpp
index edf4715..69ef74a 100644
--- a/src/server/internal_subscription.cpp
+++ b/src/server/internal_subscription.cpp
@@ -14,7 +14,7 @@ InternalSubscription::InternalSubscription(SubscriptionServiceInternal & service
   , CurrentSession(SessionAuthenticationToken)
   , Callback(callback)
   , io(service.GetIOService())
-  , Timer(io, boost::posix_time::milliseconds(data.RevisedPublishingInterval))
+  , Timer(io, boost::posix_time::milliseconds((int)data.RevisedPublishingInterval))
   , LifeTimeCount(data.RevisedLifetimeCount)
   , Logger(logger)
 {
@@ -105,7 +105,7 @@ void InternalSubscription::PublishResults(const boost::system::error_code & erro
     }
 
   TimerStopped = false;
-  Timer.expires_at(Timer.expires_at() + boost::posix_time::milliseconds(Data.RevisedPublishingInterval));
+  Timer.expires_at(Timer.expires_at() + boost::posix_time::milliseconds((int)Data.RevisedPublishingInterval));
   std::shared_ptr<InternalSubscription> self = shared_from_this();
   Timer.async_wait([self](const boost::system::error_code & error) { self->PublishResults(error); });
 }
@@ -615,5 +615,3 @@ std::vector<Variant> InternalSubscription::GetEventFields(const EventFilter & fi
 
 }
 }
-
-