diff --git a/pom.xml b/pom.xml
index ed314fa4e..b4f1fc15f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -365,7 +365,7 @@
             <dependency>
                 <groupId>com.graphql-java</groupId>
                 <artifactId>graphql-java</artifactId>
-                <version>22.3</version>
+                <version>21.5</version>
             </dependency>
             <dependency>
                 <groupId>com.nulab-inc</groupId>