diff --git a/lib/gui/etcher.js b/lib/gui/etcher.js
index 39608970..2dd873dd 100644
--- a/lib/gui/etcher.js
+++ b/lib/gui/etcher.js
@@ -81,6 +81,13 @@ electron.app.on('ready', function() {
       electron.globalShortcut.unregisterAll();
     });
 
+    // Prevent external resources from being loaded (like images)
+    // when dropping them on the WebView.
+    // See https://github.com/electron/electron/issues/5919
+    mainWindow.webContents.on('will-navigate', function(event) {
+      event.preventDefault();
+    });
+
     mainWindow.loadURL(`file://${path.join(__dirname, 'index.html')}`);
   });
 });