diff --git a/build.sbt b/build.sbt
index d710900..54fa7ee 100755
--- a/build.sbt
+++ b/build.sbt
@@ -22,7 +22,7 @@ val versions = new {
   val scala                = "2.12.20" // Must use Scala 2.12.x for sbt plugins
   val airframe             = "24.9.1"
   val sonatypeZapperClient = "1.3"
-  val sttp                 = "4.0.0-M16"
+  val sttp                 = "4.0.0-M18"
   val sonatypeClient       = "0.3.0"
 }