diff --git a/browser/components/CodeEditor.js b/browser/components/CodeEditor.js
index 77aff3da..beea8b09 100644
--- a/browser/components/CodeEditor.js
+++ b/browser/components/CodeEditor.js
@@ -214,8 +214,7 @@ export default class CodeEditor extends React.Component {
 
   insertImageMd (imageMd) {
     const textarea = this.editor.getInputField()
-    const cm = this.editor
-    cm.replaceSelection(`${textarea.value.substr(0, textarea.selectionStart)}${imageMd}${textarea.value.substr(textarea.selectionEnd)}`)
+    this.editor.replaceSelection(imageMd)
   }
 
   handlePaste (editor, e) {