diff --git a/build.sbt b/build.sbt
index 2952618..af0340b 100644
--- a/build.sbt
+++ b/build.sbt
@@ -1,7 +1,7 @@
 ThisBuild / tlBaseVersion := "0.5"
 
-val http4sVersion   = "0.23.16"
-val natchezVersion  = "0.3.0-M2"
+val http4sVersion   = "0.23.17"
+val natchezVersion  = "0.3.0-M3"
 val scala212Version = "2.12.17"
 val scala213Version = "2.13.10"
 val scala3Version   = "3.2.1"
diff --git a/modules/http4s/src/main/scala/natchez/http4s/syntax/EntryPointOps.scala b/modules/http4s/src/main/scala/natchez/http4s/syntax/EntryPointOps.scala
index 7b05579..608586f 100644
--- a/modules/http4s/src/main/scala/natchez/http4s/syntax/EntryPointOps.scala
+++ b/modules/http4s/src/main/scala/natchez/http4s/syntax/EntryPointOps.scala
@@ -42,7 +42,7 @@ trait EntryPointOps[F[_]] { outer =>
     Kleisli { req =>
       val kernelHeaders = req.headers.headers
         .collect {
-          case header if isKernelHeader(header.name) => header.name.toString -> header.value
+          case header if isKernelHeader(header.name) => header.name -> header.value
         }
         .toMap
 
@@ -139,4 +139,4 @@ trait ToEntryPointOps {
 
 }
 
-object entrypoint extends ToEntryPointOps
\ No newline at end of file
+object entrypoint extends ToEntryPointOps
diff --git a/modules/http4s/src/main/scala/natchez/http4s/syntax/KernelOps.scala b/modules/http4s/src/main/scala/natchez/http4s/syntax/KernelOps.scala
index b948733..a588fb6 100644
--- a/modules/http4s/src/main/scala/natchez/http4s/syntax/KernelOps.scala
+++ b/modules/http4s/src/main/scala/natchez/http4s/syntax/KernelOps.scala
@@ -7,14 +7,13 @@ package natchez.http4s.syntax
 import natchez.Kernel
 import org.http4s.Headers
 import org.http4s.Header
-import org.typelevel.ci.CIString
 
 trait KernelOps {
 
   def self: Kernel
 
   def toHttp4sHeaders: Headers =
-    Headers(self.toHeaders.map { case (k, v) => Header.Raw(CIString(k), v) } .toSeq)
+    Headers(self.toHeaders.map { case (k, v) => Header.Raw(k, v) } .toSeq)
 
 }
 
@@ -30,7 +29,7 @@ trait KernelCompanionOps {
   def self: Kernel.type
 
   def fromHttp4sHeaders(headers: Headers): Kernel =
-    Kernel(headers.headers.map { h => h.name.toString -> h.value } .toMap)
+    Kernel(headers.headers.map(h => h.name -> h.value).toMap)
 
 }
 
diff --git a/modules/http4s/src/test/scala/natchez/http4s/NatchezMiddlewareSuite.scala b/modules/http4s/src/test/scala/natchez/http4s/NatchezMiddlewareSuite.scala
index d7ceec6..2588066 100644
--- a/modules/http4s/src/test/scala/natchez/http4s/NatchezMiddlewareSuite.scala
+++ b/modules/http4s/src/test/scala/natchez/http4s/NatchezMiddlewareSuite.scala
@@ -74,7 +74,7 @@ class NatchezMiddlewareSuite extends InMemorySuite {
 
     val expectedHistory = {
       val requestKernel = Kernel(
-        Map("X-Custom-Header" -> "external", "X-Correlation-Id" -> "id-123")
+        Map(CustomHeaderName -> "external", CorrelationIdName -> "id-123")
       )
 
       val clientRequestTags = List(
diff --git a/project/plugins.sbt b/project/plugins.sbt
index f7e5358..f371ec1 100644
--- a/project/plugins.sbt
+++ b/project/plugins.sbt
@@ -3,7 +3,7 @@ addSbtPlugin("com.lightbend.paradox" % "sbt-paradox" % "0.10.3")
 addSbtPlugin("com.typesafe.sbt" % "sbt-site" % "1.4.1")
 addSbtPlugin("com.typesafe.sbt" % "sbt-ghpages" % "0.6.3")
 addSbtPlugin("com.timushev.sbt" % "sbt-updates" % "0.6.4")
-addSbtPlugin("org.scala-js" % "sbt-scalajs" % "1.11.0")
-addSbtPlugin("org.scala-native" % "sbt-scala-native" % "0.4.7")
+addSbtPlugin("org.scala-js" % "sbt-scalajs" % "1.12.0")
+addSbtPlugin("org.scala-native" % "sbt-scala-native" % "0.4.9")
 addSbtPlugin("org.portable-scala" % "sbt-scala-native-crossproject" % "1.2.0")
 addSbtPlugin("org.scalameta" % "sbt-mdoc" % "2.3.6")