diff --git a/pom.xml b/pom.xml
index 1643bc70b..de6e103b5 100644
--- a/pom.xml
+++ b/pom.xml
@@ -144,7 +144,7 @@
     <dependency>
       <groupId>org.apache.opennlp</groupId>
       <artifactId>opennlp-tools</artifactId>
-      <version>2.1.1</version>
+      <version>2.5.7</version>
     </dependency>
     <dependency>
       <groupId>com.google.code.findbugs</groupId>