diff --git a/mdoc-sbt/src/main/scala/mdoc/DocusaurusPlugin.scala b/mdoc-sbt/src/main/scala/mdoc/DocusaurusPlugin.scala
index a14de9ff2..67857b109 100644
--- a/mdoc-sbt/src/main/scala/mdoc/DocusaurusPlugin.scala
+++ b/mdoc-sbt/src/main/scala/mdoc/DocusaurusPlugin.scala
@@ -27,7 +27,7 @@ object DocusaurusPlugin extends AutoPlugin {
   import autoImport._
   def website: Def.Initialize[File] =
     Def.setting {
-      baseDirectory.in(ThisBuild).value / "website"
+      (ThisBuild / baseDirectory).value / "website"
     }
 
   def listJarFiles(root: Path): List[(File, String)] = {
@@ -95,8 +95,8 @@ object DocusaurusPlugin extends AutoPlugin {
 
   override def projectSettings: Seq[Def.Setting[_]] =
     List(
-      aggregate.in(docusaurusPublishGhpages) := false,
-      aggregate.in(docusaurusCreateSite) := false,
+      (docusaurusPublishGhpages / aggregate) := false,
+      (docusaurusCreateSite / aggregate) := false,
       docusaurusProjectName := moduleName.value.stripSuffix("-docs"),
       MdocPlugin.mdocInternalVariables ++= List(
         "js-out-prefix" -> "assets"
@@ -146,7 +146,7 @@ object DocusaurusPlugin extends AutoPlugin {
         Relativize.htmlSite(out.toPath)
         out
       },
-      packageDoc.in(Compile) := {
+      (Compile / packageDoc) := {
         val directory = doc.value
         val jar = target.value / "docusaurus.jar"
         val files = listJarFiles(directory.toPath)
diff --git a/mdoc-sbt/src/main/scala/mdoc/MdocPlugin.scala b/mdoc-sbt/src/main/scala/mdoc/MdocPlugin.scala
index a4f5cef57..d1617ae7e 100644
--- a/mdoc-sbt/src/main/scala/mdoc/MdocPlugin.scala
+++ b/mdoc-sbt/src/main/scala/mdoc/MdocPlugin.scala
@@ -78,8 +78,8 @@ object MdocPlugin extends AutoPlugin {
 
   override def projectSettings: Seq[Def.Setting[_]] =
     List(
-      mdocIn := baseDirectory.in(ThisBuild).value / "docs",
-      mdocOut := target.in(Compile).value / "mdoc",
+      mdocIn := (ThisBuild / baseDirectory).value / "docs",
+      mdocOut := (Compile / target).value / "mdoc",
       mdocVariables := Map.empty,
       mdocExtraArguments := Nil,
       mdocJS := None,
@@ -96,7 +96,7 @@ object MdocPlugin extends AutoPlugin {
           parsed
         ).flatten.mkString(" ")
         Def.taskDyn {
-          runMain.in(Compile).toTask(s" mdoc.SbtMain $args")
+          (Compile / runMain).toTask(s" mdoc.SbtMain $args")
         }
       }.evaluated,
       dependencyOverrides ++= List(
@@ -114,9 +114,9 @@ object MdocPlugin extends AutoPlugin {
           List()
         }
       },
-      resourceGenerators.in(Compile) += Def.task {
+      (Compile / resourceGenerators) += Def.task {
         val out =
-          managedResourceDirectories.in(Compile).value.head / "mdoc.properties"
+          (Compile / managedResourceDirectories).value.head / "mdoc.properties"
         val props = new java.util.Properties()
         mdocVariables.value.foreach { case (key, value) =>
           props.put(key, value)
@@ -126,9 +126,9 @@ object MdocPlugin extends AutoPlugin {
         }
         def getJars(mid: ModuleID) = {
 
-          val depRes = dependencyResolution.in(update).value
-          val updc = updateConfiguration.in(update).value
-          val uwconfig = unresolvedWarningConfiguration.in(update).value
+          val depRes = (update / dependencyResolution).value
+          val updc = (update / updateConfiguration).value
+          val uwconfig = (update / unresolvedWarningConfiguration).value
           val modDescr = depRes.wrapDependencyInModule(mid)
 
           depRes
@@ -190,13 +190,13 @@ object MdocPlugin extends AutoPlugin {
         props.put("out", mdocOut.value.toString)
         props.put(
           "scalacOptions",
-          scalacOptions.in(Compile).value.mkString(" ")
+          (Compile / scalacOptions).value.mkString(" ")
         )
         val classpath = ListBuffer.empty[File]
         // Can't use fullClasspath.value because it introduces cyclic dependency between
         // compilation and resource generation.
-        classpath ++= dependencyClasspath.in(Compile).value.iterator.map(_.data)
-        classpath += classDirectory.in(Compile).value
+        classpath ++= (Compile / dependencyClasspath).value.iterator.map(_.data)
+        classpath += (Compile / classDirectory).value
         props.put(
           "classpath",
           classpath.mkString(java.io.File.pathSeparator)
@@ -204,7 +204,7 @@ object MdocPlugin extends AutoPlugin {
         IO.write(props, "mdoc properties", out)
         val esVersion = props.clone().asInstanceOf[java.util.Properties]
         esVersion.put("js-module-kind", "ESModule")
-        val esOut = managedResourceDirectories.in(Compile).value.head / "es.properties"
+        val esOut = (Compile / managedResourceDirectories).value.head / "es.properties"
         IO.write(
           esVersion,
           "mdoc esmoddule properties",