diff --git a/build.gradle b/build.gradle
index 9b7b1ad2..caeb9e9c 100644
--- a/build.gradle
+++ b/build.gradle
@@ -50,7 +50,7 @@ dependencies {
     implementation group: 'com.google.errorprone', name: 'javac', version: "$errorproneJavacVersion"
 
     implementation 'org.plumelib:options:1.0.5'
-    implementation 'org.plumelib:plume-util:1.5.8'
+    implementation 'org.plumelib:plume-util:1.5.9'
 
     implementation 'com.google.guava:guava:31.1-jre'