diff --git a/CMakeLists.txt b/CMakeLists.txt
index cf036012..51db1f68 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -165,6 +165,9 @@ target_compile_definitions(QtNodes
     QT_NO_KEYWORDS
 )
 
+if(MSVC)
+  string(REGEX REPLACE "/W[0-4]" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
+endif()
 
 target_compile_options(QtNodes
   PRIVATE
diff --git a/src/AbstractGraphModel.cpp b/src/AbstractGraphModel.cpp
index 10709b7e..3ea47435 100644
--- a/src/AbstractGraphModel.cpp
+++ b/src/AbstractGraphModel.cpp
@@ -40,7 +40,9 @@ void AbstractGraphModel::portsAboutToBeDeleted(NodeId const nodeId,
             // Erases the information about the port on one side;
             auto c = makeIncompleteConnectionId(connectionId, portType);
 
-            c = makeCompleteConnectionId(c, nodeId, portIndex - nRemovedPorts);
+            c = makeCompleteConnectionId(c,
+                                         nodeId,
+                                         portIndex - static_cast<QtNodes::PortIndex>(nRemovedPorts));
 
             _shiftedByDynamicPortsConnections.push_back(c);
 
@@ -84,7 +86,9 @@ void AbstractGraphModel::portsAboutToBeInserted(NodeId const nodeId,
             // Erases the information about the port on one side;
             auto c = makeIncompleteConnectionId(connectionId, portType);
 
-            c = makeCompleteConnectionId(c, nodeId, portIndex + nNewPorts);
+            c = makeCompleteConnectionId(c,
+                                         nodeId,
+                                         portIndex + static_cast<QtNodes::PortIndex>(nNewPorts));
 
             _shiftedByDynamicPortsConnections.push_back(c);