diff --git a/src/index.tsx b/src/index.tsx
index 2e1a619..c5188e6 100644
--- a/src/index.tsx
+++ b/src/index.tsx
@@ -37,7 +37,7 @@ export interface Block {
 
 export interface DataProp {
   time: number;
-  version: string;
+  version?: string;
   blocks: Block[];
 }
 
@@ -68,7 +68,7 @@ const Blocks = ({
     ...renderers,
   };
 
-  const hasBlockId = data.version?.includes('2.21');
+  const hasBlockId = data?.version?.includes('2.21');
 
   return (
     <>