diff --git a/build.gradle b/build.gradle
index a97a7fe..be5bd91 100644
--- a/build.gradle
+++ b/build.gradle
@@ -2,7 +2,7 @@ plugins {
     id 'java'
     id 'java-library'
     id 'maven-publish'
-    id 'com.github.johnrengelman.shadow' version '7.1.2'
+    id 'com.github.johnrengelman.shadow' version '8.1.0'
 }
 
 group 'page.nafuchoco'