diff --git a/build.sbt b/build.sbt
index a3b3a45..92068d1 100755
--- a/build.sbt
+++ b/build.sbt
@@ -12,7 +12,7 @@ lazy val V = new {
   val cats: String      = "2.1.1"
   val circe: String     = "0.13.0"
   val classutil: String = "1.5.1"
-  val http4s: String    = "0.21.5"
+  val http4s: String    = "0.21.6"
   val scala: String     = "2.13.2"
   val scalatest: String = "3.2.0"
 }