diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b176d9d22a..d1207478a4 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -35,7 +35,7 @@ jobs:
     timeout-minutes: 60
     steps:
       - name: Checkout current branch (full)
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
 
@@ -114,7 +114,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout current branch (full)
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
 
@@ -258,7 +258,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout current branch (full)
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
 
@@ -290,7 +290,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout current branch (full)
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
 
diff --git a/build.sbt b/build.sbt
index 862ac65dce..c6a112f9f2 100644
--- a/build.sbt
+++ b/build.sbt
@@ -8,7 +8,7 @@ ThisBuild / organization := "co.fs2"
 ThisBuild / organizationName := "Functional Streams for Scala"
 ThisBuild / startYear := Some(2013)
 
-val Scala213 = "2.13.11"
+val Scala213 = "2.13.12"
 
 ThisBuild / scalaVersion := Scala213
 ThisBuild / crossScalaVersions := Seq("2.12.18", Scala213, "3.3.1")
diff --git a/io/shared/src/main/scala/fs2/io/io.scala b/io/shared/src/main/scala/fs2/io/io.scala
index 079c4f8043..600f4f28cd 100644
--- a/io/shared/src/main/scala/fs2/io/io.scala
+++ b/io/shared/src/main/scala/fs2/io/io.scala
@@ -20,20 +20,17 @@
  */
 
 package fs2
-package io
 
 import cats.effect.kernel.Async
 import cats.effect.kernel.Sync
 import cats.effect.syntax.all._
 import cats.syntax.all._
-import org.typelevel.scalaccompat.annotation._
 
 import java.io.{InputStream, OutputStream}
 
 /** Provides various ways to work with streams that perform IO.
   */
-@nowarn213("msg=package object inheritance is deprecated")
-object `package` extends ioplatform {
+package object io extends ioplatform {
   type IOException = java.io.IOException
 
   /** Reads all bytes from the specified `InputStream` with a buffer size of `chunkSize`.
diff --git a/project/plugins.sbt b/project/plugins.sbt
index b0af6030e2..b56c3650c5 100644
--- a/project/plugins.sbt
+++ b/project/plugins.sbt
@@ -1,4 +1,4 @@
-val sbtTypelevelVersion = "0.5.0"
+val sbtTypelevelVersion = "0.5.2"
 addSbtPlugin("org.typelevel" % "sbt-typelevel" % sbtTypelevelVersion)
 addSbtPlugin("org.typelevel" % "sbt-typelevel-site" % sbtTypelevelVersion)
 addSbtPlugin("org.scala-js" % "sbt-scalajs" % "1.13.2")