diff --git a/preprocc/pom.xml b/preprocc/pom.xml
index 6dd7b53..4f745f3 100644
--- a/preprocc/pom.xml
+++ b/preprocc/pom.xml
@@ -50,7 +50,7 @@
         <dependency>
             <groupId>com.google.code.gson</groupId>
             <artifactId>gson</artifactId>
-            <version>2.8.5</version>
+            <version>2.8.9</version>
         </dependency>
             <dependency>
                 <groupId>org.xerial</groupId>