diff --git a/src/main/kotlin/xyz/xasmc/hashbook/util/HashUtil.kt b/src/main/kotlin/xyz/xasmc/hashbook/util/HashUtil.kt
index 4c9c0a7..d93e8a6 100644
--- a/src/main/kotlin/xyz/xasmc/hashbook/util/HashUtil.kt
+++ b/src/main/kotlin/xyz/xasmc/hashbook/util/HashUtil.kt
@@ -3,7 +3,7 @@ package xyz.xasmc.hashbook.util
 import java.security.MessageDigest
 
 object HashUtil {
-    val md = MessageDigest.getInstance("SHA-256")
+    private val md = MessageDigest.getInstance("SHA-256")
 
     @OptIn(ExperimentalStdlibApi::class)
     fun hashString(str: String): String {