diff --git a/pom.xml b/pom.xml
index c4e5feb..25475dc 100644
--- a/pom.xml
+++ b/pom.xml
@@ -368,7 +368,7 @@
         <dependency>
             <groupId>org.apache.opennlp</groupId>
             <artifactId>opennlp-tools</artifactId>
-            <version>2.3.0</version>
+            <version>2.5.7</version>
         </dependency>
         <dependency>
             <groupId>junit</groupId>