diff --git a/io/js/src/main/scala/fs2/io/internal/ByteChunkOps.scala b/io/js/src/main/scala/fs2/io/internal/ByteChunkOps.scala
index 659c9bbb69..41919ce10f 100644
--- a/io/js/src/main/scala/fs2/io/internal/ByteChunkOps.scala
+++ b/io/js/src/main/scala/fs2/io/internal/ByteChunkOps.scala
@@ -23,9 +23,8 @@ package fs2.io.internal
 
 import fs2.Chunk
 import fs2.internal.jsdeps.node.bufferMod
-import fs2.internal.jsdeps.std
 
-import scala.scalajs.js.typedarray.{ArrayBuffer, TypedArrayBuffer}
+import scala.scalajs.js.typedarray.{ArrayBuffer, TypedArrayBuffer, Uint8Array}
 
 private[fs2] object ByteChunkOps {
   implicit def toByteChunkOps(chunk: Chunk[Byte]): ByteChunkOps = new ByteChunkOps(chunk)
@@ -33,7 +32,7 @@ private[fs2] object ByteChunkOps {
 
   private[fs2] final class ByteChunkOps(val chunk: Chunk[Byte]) extends AnyVal {
     def toBuffer: bufferMod.global.Buffer = bufferMod.Buffer.from(toNodeUint8Array)
-    def toNodeUint8Array: std.Uint8Array = chunk.toUint8Array.asInstanceOf[std.Uint8Array]
+    def toNodeUint8Array: Uint8Array = chunk.toUint8Array.asInstanceOf[Uint8Array]
   }
 
   private[fs2] final class BufferOps(val buffer: bufferMod.global.Buffer) extends AnyVal {
diff --git a/io/js/src/main/scala/fs2/io/internal/EventEmitterOps.scala b/io/js/src/main/scala/fs2/io/internal/EventEmitterOps.scala
index 7215e6575b..0083024998 100644
--- a/io/js/src/main/scala/fs2/io/internal/EventEmitterOps.scala
+++ b/io/js/src/main/scala/fs2/io/internal/EventEmitterOps.scala
@@ -38,7 +38,7 @@ private[fs2] object EventEmitterOps {
           .asInstanceOf[eventsMod.EventEmitter]
           .removeListener(
             event.asInstanceOf[String],
-            callback.asInstanceOf[js.Function1[js.Any, Unit]]
+            callback.asInstanceOf[js.Function1[Any, Unit]]
           )
         ()
       }
@@ -59,7 +59,7 @@ private[fs2] object EventEmitterOps {
             .asInstanceOf[eventsMod.EventEmitter]
             .removeListener(
               event.asInstanceOf[String],
-              callback.asInstanceOf[js.Function1[js.Any, Unit]]
+              callback.asInstanceOf[js.Function1[Any, Unit]]
             )
           ()
         }
@@ -78,7 +78,7 @@ private[fs2] object EventEmitterOps {
             .asInstanceOf[eventsMod.EventEmitter]
             .removeListener(
               event.asInstanceOf[String],
-              callback.asInstanceOf[js.Function1[js.Any, Unit]]
+              callback.asInstanceOf[js.Function1[Any, Unit]]
             )
           ()
         }
diff --git a/io/js/src/main/scala/fs2/io/internal/ThrowableOps.scala b/io/js/src/main/scala/fs2/io/internal/ThrowableOps.scala
index 0176370df1..a3fa590052 100644
--- a/io/js/src/main/scala/fs2/io/internal/ThrowableOps.scala
+++ b/io/js/src/main/scala/fs2/io/internal/ThrowableOps.scala
@@ -21,12 +21,12 @@
 
 package fs2.io.internal
 
-import fs2.internal.jsdeps.std
+import scala.scalajs.js
 
 private[fs2] object ThrowableOps {
   implicit def toThrowableOps(t: Throwable): ThrowableOps = new ThrowableOps(t)
 
   private[fs2] final class ThrowableOps(t: Throwable) {
-    def toJSError: std.Error = std.Error(t.getMessage(), t.getClass.getSimpleName)
+    def toJSError: js.Error = js.Error(t.getMessage())
   }
 }
diff --git a/io/js/src/main/scala/fs2/io/ioplatform.scala b/io/js/src/main/scala/fs2/io/ioplatform.scala
index 98f1c1bf69..6e36a6cfef 100644
--- a/io/js/src/main/scala/fs2/io/ioplatform.scala
+++ b/io/js/src/main/scala/fs2/io/ioplatform.scala
@@ -35,7 +35,7 @@ import fs2.internal.jsdeps.node.bufferMod
 import fs2.internal.jsdeps.node.nodeStrings
 import fs2.internal.jsdeps.node.processMod
 import fs2.internal.jsdeps.node.streamMod
-import fs2.internal.jsdeps.std
+import fs2.internal.jsdeps.node.NodeJS.WritableStream
 import fs2.io.internal.ByteChunkOps._
 import fs2.io.internal.EventEmitterOps._
 import fs2.io.internal.ThrowableOps._
@@ -101,7 +101,7 @@ private[fs2] trait ioplatform {
         _ <- registerListener0(readable, nodeStrings.close)(_.on_close(_, _)) { () =>
           dispatcher.unsafeRunAndForget(queue.offer(None))
         }(SyncIO.syncForSyncIO)
-        _ <- registerListener[std.Error](readable, nodeStrings.error)(_.on_error(_, _)) { e =>
+        _ <- registerListener[js.Error](readable, nodeStrings.error)(_.on_error(_, _)) { e =>
           dispatcher.unsafeRunAndForget(error.complete(js.JavaScriptException(e)))
         }(SyncIO.syncForSyncIO)
       } yield readable
@@ -136,9 +136,7 @@ private[fs2] trait ioplatform {
             .merge(out.drain)
             .concurrently(
               Stream.eval(
-                F.async_[Unit](cb =>
-                  duplex.asInstanceOf[streamMod.Writable].end(() => cb(Right(())))
-                )
+                F.async_[Unit](cb => duplex.asInstanceOf[streamMod.Duplex].end(() => cb(Right(()))))
               )
             )
         }
@@ -173,7 +171,7 @@ private[fs2] trait ioplatform {
               } >> go(tail)
             case None =>
               if (endAfterUse)
-                Pull.eval(F.async_[Unit](cb => writable.end(() => cb(Right(())))))
+                Pull.eval(F.async_[Unit](cb => (writable: WritableStream).end(() => cb(Right(())))))
               else
                 Pull.done
           }
@@ -235,7 +233,7 @@ private[fs2] trait ioplatform {
                       F.delay(
                         cb(
                           e.left.toOption
-                            .fold[std.Error | Null](null)(_.toJSError)
+                            .fold[js.Error | Null](null)(_.toJSError)
                         )
                       )
                     )
@@ -250,7 +248,7 @@ private[fs2] trait ioplatform {
                       F.delay(
                         cb(
                           e.left.toOption
-                            .fold[std.Error | Null](null)(_.toJSError)
+                            .fold[js.Error | Null](null)(_.toJSError)
                         )
                       )
                     )
@@ -268,7 +266,7 @@ private[fs2] trait ioplatform {
                       F.delay(
                         cb(
                           e.left.toOption
-                            .fold[std.Error | Null](null)(_.toJSError)
+                            .fold[js.Error | Null](null)(_.toJSError)
                         )
                       )
                     )
diff --git a/io/js/src/main/scala/fs2/io/net/DatagramSocketGroupPlatform.scala b/io/js/src/main/scala/fs2/io/net/DatagramSocketGroupPlatform.scala
index cad9b7c3ca..df61c3f617 100644
--- a/io/js/src/main/scala/fs2/io/net/DatagramSocketGroupPlatform.scala
+++ b/io/js/src/main/scala/fs2/io/net/DatagramSocketGroupPlatform.scala
@@ -32,7 +32,6 @@ import com.comcast.ip4s.Port
 import fs2.internal.jsdeps.node.dgramMod
 import fs2.internal.jsdeps.node.eventsMod
 import fs2.internal.jsdeps.node.nodeStrings
-import fs2.internal.jsdeps.std
 
 import scala.scalajs.js
 
@@ -63,7 +62,7 @@ private[net] trait DatagramSocketGroupCompanionPlatform {
       socket <- DatagramSocket.forAsync[F](sock)
       _ <- F
         .async_[Unit] { cb =>
-          val errorListener: js.Function1[std.Error, Unit] = { error =>
+          val errorListener: js.Function1[js.Error, Unit] = { error =>
             cb(Left(js.JavaScriptException(error)))
           }
           sock.once_error(nodeStrings.error, errorListener)
diff --git a/io/js/src/main/scala/fs2/io/net/DatagramSocketPlatform.scala b/io/js/src/main/scala/fs2/io/net/DatagramSocketPlatform.scala
index 6e4de9f3f6..6d97aa43e0 100644
--- a/io/js/src/main/scala/fs2/io/net/DatagramSocketPlatform.scala
+++ b/io/js/src/main/scala/fs2/io/net/DatagramSocketPlatform.scala
@@ -42,7 +42,6 @@ import fs2.io.internal.EventEmitterOps._
 import fs2.internal.jsdeps.node.bufferMod
 import fs2.internal.jsdeps.node.dgramMod
 import fs2.internal.jsdeps.node.nodeStrings
-import fs2.internal.jsdeps.std
 
 import scala.scalajs.js
 
@@ -78,7 +77,7 @@ private[net] trait DatagramSocketCompanionPlatform {
           )
         )
       }
-      _ <- registerListener[std.Error](sock, nodeStrings.error)(_.on_error(_, _)) { e =>
+      _ <- registerListener[js.Error](sock, nodeStrings.error)(_.on_error(_, _)) { e =>
         dispatcher.unsafeRunAndForget(error.complete(js.JavaScriptException(e)))
       }
       socket <- Resource.make(F.pure(new AsyncDatagramSocket(sock, queue, error)))(_ =>
@@ -108,7 +107,7 @@ private[net] trait DatagramSocketCompanionPlatform {
         datagram.remote.port.value.toDouble,
         datagram.remote.host.toString,
         (err, _) =>
-          Option(err.asInstanceOf[std.Error]).fold(cb(Right(())))(err =>
+          Option(err.asInstanceOf[js.Error]).fold(cb(Right(())))(err =>
             cb(Left(js.JavaScriptException(err)))
           )
       )
diff --git a/io/js/src/main/scala/fs2/io/net/SocketGroupPlatform.scala b/io/js/src/main/scala/fs2/io/net/SocketGroupPlatform.scala
index e3330e5ebc..140b9ce983 100644
--- a/io/js/src/main/scala/fs2/io/net/SocketGroupPlatform.scala
+++ b/io/js/src/main/scala/fs2/io/net/SocketGroupPlatform.scala
@@ -36,7 +36,6 @@ import com.comcast.ip4s.SocketAddress
 import fs2.internal.jsdeps.node.eventsMod
 import fs2.internal.jsdeps.node.netMod
 import fs2.internal.jsdeps.node.nodeStrings
-import fs2.internal.jsdeps.std
 import fs2.io.internal.EventEmitterOps._
 
 import scala.scalajs.js
@@ -65,7 +64,7 @@ private[net] trait SocketGroupCompanionPlatform { self: SocketGroup.type =>
         socket <- Socket.forAsync(sock)
         _ <- F
           .async[Unit] { cb =>
-            registerListener[std.Error](sock, nodeStrings.error)(_.once_error(_, _)) { error =>
+            registerListener[js.Error](sock, nodeStrings.error)(_.once_error(_, _)) { error =>
               cb(Left(js.JavaScriptException(error)))
             }.evalTap(_ =>
               F.delay(sock.connect(to.port.value.toDouble, to.host.toString, () => cb(Right(()))))
diff --git a/io/js/src/main/scala/fs2/io/net/tls/TLSParameters.scala b/io/js/src/main/scala/fs2/io/net/tls/TLSParameters.scala
index 08631ccae7..47402cfc66 100644
--- a/io/js/src/main/scala/fs2/io/net/tls/TLSParameters.scala
+++ b/io/js/src/main/scala/fs2/io/net/tls/TLSParameters.scala
@@ -27,8 +27,8 @@ package tls
 import fs2.io.internal.ByteChunkOps._
 import fs2.io.internal.ThrowableOps._
 import fs2.internal.jsdeps.node.tlsMod
-import fs2.internal.jsdeps.std
 import scala.scalajs.js.JSConverters._
+import scala.scalajs.js.typedarray.Uint8Array
 import scala.scalajs.js
 import scala.scalajs.js.|
 import cats.syntax.all._
@@ -82,7 +82,7 @@ sealed trait TLSParameters {
     requestCert.foreach(options.setRequestCert(_))
     rejectUnauthorized.foreach(options.setRejectUnauthorized(_))
     alpnProtocols
-      .map(_.map(x => x: String | std.Uint8Array).toJSArray)
+      .map(_.map(x => x: String | Uint8Array).toJSArray)
       .foreach(options.setALPNProtocols(_))
     sniCallback.map(_.toJS(dispatcher)).foreach(options.setSNICallback(_))
   }
@@ -132,7 +132,7 @@ object TLSParameters {
     def apply[F[_]: Async](servername: String): F[Either[Throwable, Option[SecureContext]]]
     private[TLSParameters] def toJS[F[_]](dispatcher: Dispatcher[F])(implicit
         F: Async[F]
-    ): js.Function2[String, js.Function2[std.Error | Null, js.UndefOr[
+    ): js.Function2[String, js.Function2[js.Error | Null, js.UndefOr[
       tlsMod.SecureContext
     ], Unit], Unit] = { (servername, cb) =>
       dispatcher.unsafeRunAndForget {
@@ -163,7 +163,7 @@ object TLSParameters {
     def apply(servername: String, cert: Chunk[Byte]): Either[Throwable, Unit]
 
     private[TLSParameters] def toJS
-        : js.Function2[String, tlsMod.PeerCertificate, js.UndefOr[std.Error]] = {
+        : js.Function2[String, tlsMod.PeerCertificate, js.UndefOr[js.Error]] = {
       (servername, cert) =>
         apply(servername, cert.raw.toChunk) match {
           case Left(ex) => ex.toJSError
diff --git a/io/js/src/main/scala/fs2/io/net/tls/TLSSocketPlatform.scala b/io/js/src/main/scala/fs2/io/net/tls/TLSSocketPlatform.scala
index 8781c49738..4f901dab92 100644
--- a/io/js/src/main/scala/fs2/io/net/tls/TLSSocketPlatform.scala
+++ b/io/js/src/main/scala/fs2/io/net/tls/TLSSocketPlatform.scala
@@ -36,7 +36,6 @@ import fs2.internal.jsdeps.node.netMod
 import fs2.internal.jsdeps.node.nodeStrings
 import fs2.internal.jsdeps.node.streamMod
 import fs2.internal.jsdeps.node.tlsMod
-import fs2.internal.jsdeps.std
 import fs2.io.internal.ByteChunkOps._
 import fs2.io.internal.SuspendedStream
 
@@ -67,7 +66,7 @@ private[tls] trait TLSSocketCompanionPlatform { self: TLSSocket.type =>
         dispatcher.unsafeRunAndForget(
           errorDef.complete(IOException.unapply(ex).getOrElse(ex))
         )
-      }: js.Function1[std.Error, Unit]
+      }: js.Function1[js.Error, Unit]
       tlsSockReadable <- suspendReadableAndRead(
         destroyIfNotEnded = false,
         destroyIfCanceled = false
diff --git a/io/js/src/main/scala/fs2/io/net/unixsocket/UnixSocketsPlatform.scala b/io/js/src/main/scala/fs2/io/net/unixsocket/UnixSocketsPlatform.scala
index e69917cb79..ad137ec65a 100644
--- a/io/js/src/main/scala/fs2/io/net/unixsocket/UnixSocketsPlatform.scala
+++ b/io/js/src/main/scala/fs2/io/net/unixsocket/UnixSocketsPlatform.scala
@@ -26,7 +26,6 @@ import cats.effect.kernel.Async
 import cats.effect.kernel.Resource
 import fs2.io.net.Socket
 import fs2.internal.jsdeps.node.netMod
-import fs2.internal.jsdeps.std
 import cats.syntax.all._
 import scala.scalajs.js
 import cats.effect.std.Dispatcher
@@ -79,7 +78,7 @@ private[unixsocket] trait UnixSocketsCompanionPlatform {
           )
           _ <- Stream
             .resource(
-              registerListener[std.Error](server, nodeStrings.error)(_.once_error(_, _)) { e =>
+              registerListener[js.Error](server, nodeStrings.error)(_.once_error(_, _)) { e =>
                 dispatcher.unsafeRunAndForget(errored.complete(js.JavaScriptException(e)))
               }
             )
diff --git a/project/build.properties b/project/build.properties
index e64c208ff5..1e70b0c1c0 100644
--- a/project/build.properties
+++ b/project/build.properties
@@ -1 +1 @@
-sbt.version=1.5.8
+sbt.version=1.6.0
diff --git a/project/plugins.sbt b/project/plugins.sbt
index ffe6e1ec29..caf52a93c3 100644
--- a/project/plugins.sbt
+++ b/project/plugins.sbt
@@ -6,7 +6,7 @@ addSbtPlugin("com.github.tkawachi" % "sbt-doctest" % "0.9.9")
 addSbtPlugin("pl.project13.scala" % "sbt-jmh" % "0.4.3")
 addSbtPlugin("org.scalameta" % "sbt-scalafmt" % "2.4.6")
 addSbtPlugin("org.scalameta" % "sbt-mdoc" % "2.2.24")
-addSbtPlugin("org.scalablytyped.converter" % "sbt-converter" % "1.0.0-beta36")
+addSbtPlugin("org.scalablytyped.converter" % "sbt-converter" % "1.0.0-beta37")
 
 // Needed until sjs 1.8 due to https://github.com/scala-js/scala-js-js-envs/issues/12
 libraryDependencies += "org.scala-js" %% "scalajs-env-nodejs" % "1.2.1"