diff --git a/build.gradle b/build.gradle
index 6bdebef..ff57898 100644
--- a/build.gradle
+++ b/build.gradle
@@ -113,7 +113,7 @@ dependencies {
     api 'org.apache.directory.api:api-all:2.1.7'
 
     // DNS lookups
-    api 'dnsjava:dnsjava:3.5.3'
+    api 'dnsjava:dnsjava:3.6.3'
 
     // HTTP connections
     api 'org.apache.httpcomponents:httpclient:4.5.14'