diff --git a/project/Versions.scala b/project/Versions.scala
index 95e398f..c111ce9 100644
--- a/project/Versions.scala
+++ b/project/Versions.scala
@@ -40,6 +40,6 @@ object Versions {
 
     def pdfbox = "[2.0.24,)"
 
-    def undertow = "[2.2.24.Final,)"
+    def undertow = "2.3.23.Final"
   }
 }