diff --git a/build.gradle b/build.gradle
index 08d14af1a..003b192ac 100644
--- a/build.gradle
+++ b/build.gradle
@@ -112,7 +112,7 @@ allprojects  {
             dependency 'com.google.truth:truth:1.1.2'
             dependency 'com.google.truth.extensions:truth-java8-extension:1.1.2'
             dependency 'org.apache.commons:commons-email:1.5'
-            dependency 'commons-io:commons-io:2.8.0'
+            dependency 'commons-io:commons-io:2.9.0'
             dependency 'org.drizzle.jdbc:drizzle-jdbc:1.4'
             dependency 'com.github.librepdf:openpdf:1.3.26'
             dependency 'org.mnode.ical4j:ical4j:3.0.25'