update FreeMarker dependency
diff --git a/pom.xml b/pom.xml
index d50ad9f..f6afe50 100644
--- a/pom.xml
+++ b/pom.xml
@@ -209,7 +209,7 @@
     <dependency>
       <groupId>org.freemarker</groupId>
       <artifactId>freemarker</artifactId>
-      <version>2.3.28</version>
+      <version>2.3.29</version>
       <scope>provided</scope>
     </dependency>
     <dependency>