diff --git a/explorer/post-parser.js b/explorer/post-parser.js
index 7a30245..e82b427 100644
--- a/explorer/post-parser.js
+++ b/explorer/post-parser.js
@@ -1839,8 +1839,8 @@
           case 'HTML_Void_Tag': return [ [ 'Tag', token.name ], token.attrs ];
           case 'Text': return token.value;
           case 'WP_Block': return [ [ 'Block', token.blockType ], token.attrs, children ];
-          case 'WP_Block_Open': return [ [ '+Block', token.blockType ], token.attrs ];
-          case 'WP_Block_Close': return [ [ '-Block' ] ];
+          case 'WP_Block_Start': return [ [ '+Block', token.blockType ], token.attrs ];
+          case 'WP_Block_End': return [ [ '-Block' ] ];
           default: return token;
         }
       }
diff --git a/src/post.pegjs b/src/post.pegjs
index 5c80b9d..1942d85 100644
--- a/src/post.pegjs
+++ b/src/post.pegjs
@@ -29,8 +29,8 @@
       case 'HTML_Void_Tag': return [ [ 'Tag', token.name ], token.attrs ];
       case 'Text': return token.value;
       case 'WP_Block': return [ [ 'Block', token.blockType ], token.attrs, children ];
-      case 'WP_Block_Open': return [ [ '+Block', token.blockType ], token.attrs ];
-      case 'WP_Block_Close': return [ [ '-Block' ] ];
+      case 'WP_Block_Start': return [ [ '+Block', token.blockType ], token.attrs ];
+      case 'WP_Block_End': return [ [ '-Block' ] ];
       default: return token;
     }
   }