diff --git a/examples/rich-text/index.js b/examples/rich-text/index.js
index c1d9bc636..d0bad01b8 100644
--- a/examples/rich-text/index.js
+++ b/examples/rich-text/index.js
@@ -188,7 +188,7 @@ class RichText extends React.Component {
     else {
       const isList = this.hasBlock('list-item')
       const isType = state.blocks.some((block) => {
-        return !!document.getClosest(block, parent => parent.type == type)
+        return !!document.getClosest(block.key, parent => parent.type == type)
       })
 
       if (isList && isType) {
diff --git a/examples/tables/index.js b/examples/tables/index.js
index 44399cc26..b14471367 100644
--- a/examples/tables/index.js
+++ b/examples/tables/index.js
@@ -104,8 +104,8 @@ class Tables extends React.Component {
     const startNode = document.getDescendant(startKey)
 
     if (selection.isAtStartOf(startNode)) {
-      const previous = document.getPreviousText(startNode)
-      const prevBlock = document.getClosestBlock(previous)
+      const previous = document.getPreviousText(startNode.key)
+      const prevBlock = document.getClosestBlock(previous.key)
 
       if (prevBlock.type == 'table-cell') {
         e.preventDefault()
diff --git a/src/plugins/core.js b/src/plugins/core.js
index 45a660f18..6d0404433 100644
--- a/src/plugins/core.js
+++ b/src/plugins/core.js
@@ -492,14 +492,14 @@ function Plugin(options = {}) {
     if (data.isOpt) return
     if (state.isExpanded) return
 
-    const { document, startText } = state
-    const hasVoidParent = document.hasVoidParent(startText.key)
+    const { document, startKey, startText } = state
+    const hasVoidParent = document.hasVoidParent(startKey)
 
     if (
       startText.text == '' ||
       hasVoidParent
     ) {
-      const previousText = document.getPreviousText(startText.key)
+      const previousText = document.getPreviousText(startKey)
       if (!previousText) return
 
       debug('onKeyDownLeft', { data })
@@ -530,14 +530,14 @@ function Plugin(options = {}) {
     if (data.isOpt) return
     if (state.isExpanded) return
 
-    const { document, startText } = state
-    const hasVoidParent = document.hasVoidParent(startText)
+    const { document, startKey, startText } = state
+    const hasVoidParent = document.hasVoidParent(startKey)
 
     if (
       startText.text == '' ||
       hasVoidParent
     ) {
-      const nextText = document.getNextText(startText)
+      const nextText = document.getNextText(startKey)
       if (!nextText) return state
 
       debug('onKeyDownRight', { data })