diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3d35b0c..920a8e9 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -28,7 +28,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        scala: [2.12]
+        scala: [2.12, 3]
         java: [temurin@8]
     runs-on: ${{ matrix.os }}
     timeout-minutes: 60
@@ -130,6 +130,16 @@ jobs:
           tar xf targets.tar
           rm targets.tar
 
+      - name: Download target directories (3)
+        uses: actions/download-artifact@v4
+        with:
+          name: target-${{ matrix.os }}-${{ matrix.java }}-3
+
+      - name: Inflate target directories (3)
+        run: |
+          tar xf targets.tar
+          rm targets.tar
+
       - name: Import signing key
         if: env.PGP_SECRET != '' && env.PGP_PASSPHRASE == ''
         env:
@@ -188,7 +198,7 @@ jobs:
       - name: Submit Dependencies
         uses: scalacenter/sbt-dependency-submission@v2
         with:
-          modules-ignore: sbt-tpolecat_2.12
+          modules-ignore: sbt-tpolecat_2.12 sbt-tpolecat_3
           configs-ignore: test scala-tool scala-doc-tool test-internal
 
   validate-steward:
diff --git a/build.sbt b/build.sbt
index 522b975..58a4249 100644
--- a/build.sbt
+++ b/build.sbt
@@ -17,7 +17,7 @@ ThisBuild / semanticdbVersion := scalafixSemanticdb.revision
 
 ThisBuild / versionScheme := Some(VersionScheme.EarlySemVer)
 
-ThisBuild / scalaVersion := "2.12.19"
+ThisBuild / crossScalaVersions := Seq("2.12.19", "3.3.4")
 
 lazy val `sbt-tpolecat` = project
   .in(file("."))
@@ -55,14 +55,16 @@ lazy val `sbt-tpolecat-plugin` = project
     test := {
       (Test / test).value
       scripted.toTask("").value
-    }
+    },
+    sbtVersion := { if (scalaVersion.value.startsWith("3.")) "2.0.0-M2" else "1.10.2" }
   )
 
 lazy val `sbt-tpolecat-scalafix` = scalafixProject("sbt-tpolecat")
   .rulesConfigure(project =>
     project.settings(
       mimaPreviousArtifacts := Set(
-      )
+      ),
+      crossScalaVersions := Seq("2.12.19")
     )
   )
   .inputSettings(addSbtPlugin("io.github.davidgregory084" % "sbt-tpolecat" % "0.4.0"))
diff --git a/plugin/src/main/scala/io/github/davidgregory084/TpolecatPlugin.scala b/plugin/src/main/scala/io/github/davidgregory084/TpolecatPlugin.scala
index 7c1760a..dc1324b 100644
--- a/plugin/src/main/scala/io/github/davidgregory084/TpolecatPlugin.scala
+++ b/plugin/src/main/scala/io/github/davidgregory084/TpolecatPlugin.scala
@@ -17,7 +17,7 @@
 package org.typelevel.sbt.tpolecat
 
 import sbt.Keys._
-import sbt.{ScalaVersion => _, _}
+import sbt.{ScalaVersion => _, given, _}
 
 import scala.util.Try
 import org.typelevel.scalacoptions._