diff --git a/CMakeLists.txt b/CMakeLists.txt
index b632d5f..ff729d5 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -14,8 +14,8 @@ cmake_minimum_required(VERSION 3.2 FATAL_ERROR)
 
 # project name
 project(amqpcpp)
-set (VERSION_MAJOR 3)
-set (VERSION_MINOR 2)
+set (VERSION_MAJOR 4)
+set (VERSION_MINOR 0)
 set (VERSION_PATCH 0)
 set (SO_VERSION ${VERSION_MAJOR}.${VERSION_MINOR})
 
diff --git a/Makefile b/Makefile
index a5a9ca6..0ea9e6e 100644
--- a/Makefile
+++ b/Makefile
@@ -2,8 +2,8 @@ PREFIX                  ?= /usr
 INCLUDE_DIR             = ${PREFIX}/include
 LIBRARY_DIR             = ${PREFIX}/lib
 export LIBRARY_NAME		= amqpcpp
-export SONAME			= 3.2
-export VERSION			= 3.2.0
+export SONAME			= 4.0
+export VERSION			= 4.0.0
 
 all:
 		$(MAKE) -C src all
diff --git a/include/amqpcpp/channelimpl.h b/include/amqpcpp/channelimpl.h
index 39bea70..71a08a3 100644
--- a/include/amqpcpp/channelimpl.h
+++ b/include/amqpcpp/channelimpl.h
@@ -624,7 +624,7 @@ public:
 
         // all later deferred objects should report an error, because it
         // was not possible to complete the instruction as the channel is
-        // now closed
+        // now closed (but the channel onError does not have to run)
         reportError("Channel has been closed", false);
 
         // done
diff --git a/include/amqpcpp/libev.h b/include/amqpcpp/libev.h
index 7a13127..416f5cd 100644
--- a/include/amqpcpp/libev.h
+++ b/include/amqpcpp/libev.h
@@ -189,6 +189,12 @@ private:
          */
         ev_tstamp _expire;
         
+        /**
+         *  Are heartbeats enabled?
+         *  @var bool
+         */
+        bool _enabled = false;
+        
         /**
          *  Interval between heartbeats
          *  @var uint16_t
@@ -216,6 +222,9 @@ private:
          */
         virtual void onExpired() override
         {
+            // do nothing if heartbeats are not enabled
+            if (!_enabled) return;
+            
             // get the current time
             ev_tstamp now = ev_now(_loop);
             
@@ -313,6 +322,9 @@ private:
          */
         uint16_t start()
         {
+            // remember that heartbeats are enabled
+            _enabled = true;
+            
             // expose the interval (the timer is already running, so we do not have to explicitly start it)
             return _interval;
         }
diff --git a/src/connectionimpl.cpp b/src/connectionimpl.cpp
index 7b91dcd..bc06c4d 100644
--- a/src/connectionimpl.cpp
+++ b/src/connectionimpl.cpp
@@ -192,7 +192,7 @@ bool ConnectionImpl::fail(const Monitor &monitor, const char *message)
     while (!_channels.empty())
     {
         // report the errors
-        _channels.begin()->second->reportError(message, false);
+        _channels.begin()->second->reportError(message);
 
         // leap out if no longer valid
         if (!monitor.valid()) return false;