diff --git a/citeproc-java/build.gradle b/citeproc-java/build.gradle
index 2b4a5ddf..065aad40 100644
--- a/citeproc-java/build.gradle
+++ b/citeproc-java/build.gradle
@@ -1,6 +1,6 @@
 plugins {
     id 'java-library'
-    id 'com.netflix.nebula.optional-base' version '9.0.0'
+    id 'com.netflix.nebula.optional-base' version '10.0.0'
 }
 
 apply plugin: 'maven-publish'