diff --git a/pom.xml b/pom.xml
index 769a090..d4e7e34 100644
--- a/pom.xml
+++ b/pom.xml
@@ -40,7 +40,7 @@
       -->
       <format.skip>false</format.skip>
       <formatter.version>2.29.0</formatter.version>
-      <impsort.version>1.12.0</impsort.version>
+      <impsort.version>1.13.0</impsort.version>
 
       <!-- Suppress strict JavaDoc validation -->
       <!-- http://blog.joda.org/2014/02/turning-off-doclint-in-jdk-8-javadoc.html -->