diff --git a/library/build.gradle b/library/build.gradle
index 49659e67..e4541606 100644
--- a/library/build.gradle
+++ b/library/build.gradle
@@ -59,7 +59,7 @@ ext {
 
     poi_version = "5.3.0"
 
-    open_nlp_version = "2.2.0"
+    open_nlp_version = "2.5.5"
 }
 
 dependencies {