diff --git a/src/editor/contentState/index.js b/src/editor/contentState/index.js
index cc508ca0..01f4d9de 100644
--- a/src/editor/contentState/index.js
+++ b/src/editor/contentState/index.js
@@ -164,11 +164,10 @@ class ContentState {
     matches.forEach((m, i) => {
       m.active = i === index
     })
-    // console.log(startKey, endKey)
     const startIndex = startKey ? blocks.findIndex(block => block.key === startKey) : 0
     const endIndex = endKey ? blocks.findIndex(block => block.key === endKey) + 1 : blocks.length
     const needRenderBlocks = blocks.slice(startIndex, endIndex)
-    // console.log(JSON.stringify(needRenderBlocks, null, 2), startKey, endKey)
+
     this.setNextRenderRange()
     this.stateRender.partialRender(needRenderBlocks, cursor, activeBlocks, matches, startKey, endKey)
     this.pre2CodeMirror(true, [...new Set([cursorOutMostBlock, ...needRenderBlocks])])
diff --git a/src/editor/parser/StateRender.js b/src/editor/parser/StateRender.js
index 98cf92c8..88e655b1 100644
--- a/src/editor/parser/StateRender.js
+++ b/src/editor/parser/StateRender.js
@@ -433,7 +433,8 @@ class StateRender {
     } else {
       result = [ text.substring(rStart, rEnd) ]
     }
-
+    // fix snabbdom-to-html bug https://github.com/snabbdom/snabbdom-to-html/issues/41
+    if (result.length === 1 && result[0] === '') result.length = 0
     return result
   }
   // render token of text type to vdom.
diff --git a/src/main/menus/edit.js b/src/main/menus/edit.js
index e812b7b6..5a3681ba 100755
--- a/src/main/menus/edit.js
+++ b/src/main/menus/edit.js
@@ -13,7 +13,7 @@ export default {
     }
   }, {
     label: 'Redo',
-    accelerator: 'CmdOrCtrl+Y',
+    accelerator: 'Shift+CmdOrCtrl+Z',
     click: (menuItem, browserWindow) => {
       actions.edit(browserWindow, 'redo')
     }