diff --git a/build.sbt b/build.sbt
index fa7e5c8ff..a94ad32db 100644
--- a/build.sbt
+++ b/build.sbt
@@ -2,7 +2,7 @@ import Dependencies._
 
 val Scala213 = "2.13.11"
 val Scala3 = "3.3.1"
-val http4sVersion = "1.0.0-M42"
+val http4sVersion = "1.0.0-M43"
 val log4catsVersion = "2.7.0"
 val munitCatsEffectVersion = "2.0.0"