diff --git a/build.sbt b/build.sbt
index a102dcb..2c54d87 100644
--- a/build.sbt
+++ b/build.sbt
@@ -14,7 +14,7 @@ lazy val kindProjectorVersion = "0.10.3"
 
 lazy val logbackVersion = "1.2.3"
 
-lazy val logstashVersion = "6.5"
+lazy val logstashVersion = "6.6"
 
 lazy val scalacheckVersion = "1.15.2"