diff --git a/build.gradle b/build.gradle
index cd60e214..03f5bb2c 100644
--- a/build.gradle
+++ b/build.gradle
@@ -60,7 +60,7 @@ dependencies {
   implementation 'org.ccil.cowan.tagsoup:tagsoup:1.2.1'
   implementation 'org.eclipse.jetty.ee9:jetty-ee9-servlet:12.0.19'
   implementation 'org.eclipse.jetty:jetty-xml:12.0.19'
-  implementation 'org.mozilla:rhino-all:1.8.0'
+  implementation 'org.mozilla:rhino-all:1.9.0'
   implementation 'org.sejda.imageio:webp-imageio:0.1.6'
   implementation 'xerces:xercesImpl:2.12.2'
   implementation 'xmlrpc:xmlrpc:2.0.1'