diff --git a/lib/NodeMCU-Tool.js b/lib/NodeMCU-Tool.js
index 62e7395..4f7f1fb 100755
--- a/lib/NodeMCU-Tool.js
+++ b/lib/NodeMCU-Tool.js
@@ -142,13 +142,19 @@ Tool.upload = function(localFiles, options, onProgess){
         // get file stats
         try{
             var fileInfo = _fs.statSync(localFile);
-
         // local file available
-        }catch (err){
+        } catch (err){
             _logger.error('Local file not found "' + localFile + '" skipping...');
             onComplete();
             return;
         }
+        
+        // check if file is directory
+        if (fileInfo.isDirectory()) {
+            _mculogger.error('Path "' + localFile + '" is a directory.');
+            onComplete();
+            return;
+        }
 
         // display filename
         _logger.log('Uploading "' + localFile + '" >> "' + remoteFilename + '"...');