diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9d4f92b..987a4f6 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -13,4 +13,4 @@ jobs:
         java-version: 8
         cache: sbt
     - uses: sbt/setup-sbt@v1
-    - run: sbt compile
+    - run: sbt +compile
diff --git a/build.sbt b/build.sbt
index b0db712..f3745f3 100644
--- a/build.sbt
+++ b/build.sbt
@@ -16,25 +16,31 @@ inThisBuild(
         url("https://geirsson.com")
       )
     ),
-    crossScalaVersions := Seq(scala212)
   )
 )
 
 onLoadMessage := s"Welcome to sbt-ci-release ${version.value}"
-
+crossScalaVersions := Nil
 publish / skip := true // don't publish the root project
 
 lazy val plugin = project
   .enablePlugins(SbtPlugin)
   .settings(
     moduleName := "sbt-ci-release",
+    crossScalaVersions := Seq(scala212, scala3),
+    scalacOptions ++= {
+      scalaBinaryVersion.value match {
+        case "2.12" => "-Xsource:3" :: Nil
+        case _      => Nil
+      }
+    },
     (pluginCrossBuild / sbtVersion) := {
       scalaBinaryVersion.value match {
         case "2.12" => "1.5.8"
         case _      => "2.0.0-M2"
       }
     },
-    addSbtPlugin("com.github.sbt" % "sbt-dynver" % "5.0.1"),
+    addSbtPlugin("com.github.sbt" % "sbt-dynver" % "5.1.0"),
     addSbtPlugin("com.github.sbt" % "sbt-git" % "2.1.0"),
     addSbtPlugin("com.github.sbt" % "sbt-pgp" % "2.3.0"),
     addSbtPlugin("org.xerial.sbt" % "sbt-sonatype" % "3.12.2")
diff --git a/plugin/src/main/scala/com/geirsson/PipeFail.scala b/plugin/src/main/scala-2.12/com/geirsson/PipeFail.scala
similarity index 87%
rename from plugin/src/main/scala/com/geirsson/PipeFail.scala
rename to plugin/src/main/scala-2.12/com/geirsson/PipeFail.scala
index 1e46f8b..a4d793f 100644
--- a/plugin/src/main/scala/com/geirsson/PipeFail.scala
+++ b/plugin/src/main/scala-2.12/com/geirsson/PipeFail.scala
@@ -19,14 +19,15 @@ object PipeFail {
 
         override def buffer[T](f: => T): T = f
       }
-      Try(p1.!!(logger)).map(result =>
+
+      Try(p1.!!(logger)).map((result) =>
         (p2 #< new ByteArrayInputStream(result.getBytes))
       ) match {
-        case Failure(exception) =>
+        case Failure(ex) =>
           error match {
             case Some(errorMessageFromPipe) =>
-              throw new RuntimeException(errorMessageFromPipe, exception)
-            case None => throw exception
+              throw new RuntimeException(errorMessageFromPipe, ex)
+            case None => throw ex
           }
         case Success(value) => value
       }
diff --git a/plugin/src/main/scala-3/com/geirsson/PipeFail.scala b/plugin/src/main/scala-3/com/geirsson/PipeFail.scala
new file mode 100644
index 0000000..09b305a
--- /dev/null
+++ b/plugin/src/main/scala-3/com/geirsson/PipeFail.scala
@@ -0,0 +1,27 @@
+package com.geirsson
+
+import java.io.ByteArrayInputStream
+import scala.sys.process.{ProcessBuilder, ProcessLogger}
+import scala.util.{Failure, Success, Try}
+
+object PipeFail:
+  implicit class PipeFailOps(p1: ProcessBuilder):
+    @volatile
+    private var error: Option[String] = None
+    def #|!(p2: ProcessBuilder): ProcessBuilder =
+      val logger = new ProcessLogger:
+        override def out(s: => String): Unit = ()
+        override def err(s: => String): Unit =
+          error = Some(s)
+        override def buffer[T](f: => T): T = f
+      Try(p1.!!(logger)).map((result) =>
+        (p2 #< new ByteArrayInputStream(result.getBytes))
+      ) match
+        case Failure(ex) =>
+          error match {
+            case Some(errorMessageFromPipe) =>
+              throw new RuntimeException(errorMessageFromPipe, ex)
+            case None => throw ex
+          }
+        case Success(value) => value
+end PipeFail
diff --git a/plugin/src/main/scala/com/geirsson/CiReleasePlugin.scala b/plugin/src/main/scala/com/geirsson/CiReleasePlugin.scala
index e9386fb..ad99c50 100644
--- a/plugin/src/main/scala/com/geirsson/CiReleasePlugin.scala
+++ b/plugin/src/main/scala/com/geirsson/CiReleasePlugin.scala
@@ -4,24 +4,24 @@ import com.geirsson.PipeFail.PipeFailOps
 import com.github.sbt.git.GitPlugin
 import com.github.sbt.git.SbtGit.GitKeys
 import com.jsuereth.sbtpgp.SbtPgp
-import com.jsuereth.sbtpgp.SbtPgp.autoImport._
+import com.jsuereth.sbtpgp.SbtPgp.autoImport.*
 
 import java.nio.file.Files
 import java.nio.file.Paths
 import java.nio.charset.StandardCharsets
 import java.util.Base64
 import sbt.Def
-import sbt.Keys._
-import sbt._
+import sbt.Keys.*
+import sbt.{ given, * }
 import sbt.plugins.JvmPlugin
 import sbtdynver.DynVerPlugin
-import sbtdynver.DynVerPlugin.autoImport._
+import sbtdynver.DynVerPlugin.autoImport.*
 
 import scala.deprecated
-import scala.sys.process._
+import scala.sys.process.{ given, * }
 import scala.util.control.NonFatal
 import xerial.sbt.Sonatype
-import xerial.sbt.Sonatype.autoImport._
+import xerial.sbt.Sonatype.autoImport.*
 
 object CiReleasePlugin extends AutoPlugin {
 
@@ -93,7 +93,9 @@ object CiReleasePlugin extends AutoPlugin {
       s"unzip gpg.zip".!
       s"gpg $importCommand gpg.key".!
     } else {
-      (s"echo $secret" #|! "base64 --decode" #|! s"gpg $importCommand").!
+      (Process(s"echo $secret") #|!
+        Process("base64 --decode") #|!
+        Process(s"gpg $importCommand")).!
     }
   }
 
diff --git a/project/plugins.sbt b/project/plugins.sbt
index 48fe06d..b8ae257 100644
--- a/project/plugins.sbt
+++ b/project/plugins.sbt
@@ -1,6 +1,9 @@
 Compile / unmanagedSourceDirectories +=
   (ThisBuild / baseDirectory).value.getParentFile /
     "plugin" / "src" / "main" / "scala"
+Compile / unmanagedSourceDirectories +=
+  (ThisBuild / baseDirectory).value.getParentFile /
+    "plugin" / "src" / "main" / "scala-2.12"
 addSbtPlugin("com.github.sbt" % "sbt-dynver" % "5.0.1")
 addSbtPlugin("com.github.sbt" % "sbt-git" % "2.1.0")
 addSbtPlugin("com.github.sbt" % "sbt-pgp" % "2.3.0")