diff --git a/src/components/MethodName.tsx b/src/components/MethodName.tsx
index 1ed596d..ff45cae 100644
--- a/src/components/MethodName.tsx
+++ b/src/components/MethodName.tsx
@@ -1,12 +1,12 @@
 import React from "react";
-import { use4Bytes } from "../use4Bytes";
+import { rawInputTo4Bytes, use4Bytes } from "../use4Bytes";
 
 type MethodNameProps = {
   data: string;
 };
 
 const MethodName: React.FC<MethodNameProps> = ({ data }) => {
-  const rawFourBytes = data.slice(0, 10);
+  const rawFourBytes = rawInputTo4Bytes(data);
   const methodName = use4Bytes(rawFourBytes);
   const isSimpleTransfer = data === "0x";
   const methodTitle = isSimpleTransfer
diff --git a/src/use4Bytes.ts b/src/use4Bytes.ts
index 5f837e6..a1ab465 100644
--- a/src/use4Bytes.ts
+++ b/src/use4Bytes.ts
@@ -84,7 +84,7 @@ export const use4Bytes = (rawFourBytes: string) => {
   return name;
 };
 
-export const rawInputTo4Bytes = (rawInput: string) => rawInput.substr(0, 10);
+export const rawInputTo4Bytes = (rawInput: string) => rawInput.slice(0, 10);
 
 /**
  * Extract 4bytes DB info