diff --git a/.github/workflows/scala.yml b/.github/workflows/scala.yml
index 0e30450..ed754a3 100644
--- a/.github/workflows/scala.yml
+++ b/.github/workflows/scala.yml
@@ -7,11 +7,11 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        scala: ["2.11.12", "2.12.11", "2.13.1"]
+        scala: ["2.11.12", "2.12.15", "2.13.7"]
 
     steps:
     - uses: actions/checkout@v2
-    - uses: olafurpg/setup-scala@v7
+    - uses: olafurpg/setup-scala@v12
       with:
         java-version: adopt@1.8
     - name: Run tests
diff --git a/build.sbt b/build.sbt
index 19b086d..4c75497 100644
--- a/build.sbt
+++ b/build.sbt
@@ -1,7 +1,7 @@
 import xerial.sbt.Sonatype._
 
-lazy val scala213 = "2.13.1"
-lazy val scala212 = "2.12.11"
+lazy val scala213 = "2.13.7"
+lazy val scala212 = "2.12.15"
 lazy val scala211 = "2.11.12"
 
 lazy val supportedScalaVersions = List(scala211, scala212, scala213)
@@ -13,7 +13,7 @@ ThisBuild / homepage := Some(url("http://github.com/oleg-py/better-monadic-for")
 ThisBuild / scalaVersion := Option(System.getenv("SCALA_VERSION")).filter(_.nonEmpty).getOrElse(scala213)
 
 val testSettings = Seq(
-  libraryDependencies += "org.scalatest" %% "scalatest" % "3.1.2" % Test,
+  libraryDependencies += "org.scalatest" %% "scalatest" % "3.1.4" % Test,
   Test / scalacOptions ++= {
     val jar = (betterMonadicFor / Compile / packageBin).value
     Seq(s"-Xplugin:${jar.getAbsolutePath}", s"-Jdummy=${jar.lastModified}") // ensures recompile
@@ -60,10 +60,10 @@ lazy val pcplodTests = (project in file("pcplod-tests"))
       "org.ensime" %% "pcplod" % "1.2.1" % Test
     ),
     // WORKAROUND https://github.com/ensime/pcplod/issues/12
-    fork in Test := true,
-    javaOptions in Test ++= Seq(
-      s"""-Dpcplod.settings=${(scalacOptions in Test).value.filterNot(_.contains(",")).mkString(",")}""",
-      s"""-Dpcplod.classpath=${(fullClasspath in Test).value.map(_.data).mkString(",")}"""
+    Test / fork := true,
+    Test / javaOptions ++= Seq(
+      s"""-Dpcplod.settings=${(Test / scalacOptions).value.filterNot(_.contains(",")).mkString(",")}""",
+      s"""-Dpcplod.classpath=${(Test / fullClasspath).value.map(_.data).mkString(",")}"""
     )
   )
   .settings(testSettings)
@@ -72,7 +72,7 @@ lazy val catsTests = (project in file("cats-tests"))
   .dependsOn(pluginTests % "compile->compile;test->test")
   .settings(
     name := "cats-tests",
-    crossScalaVersions := List(scala211, scala212),
+    crossScalaVersions := supportedScalaVersions,
     libraryDependencies ++= Seq(
       "org.typelevel" %% "cats-core" % "2.0.0" % Test
     )
@@ -84,9 +84,9 @@ lazy val scalazTests = (project in file("scalaz-tests"))
   .dependsOn(pluginTests % "compile->compile;test->test")
   .settings(
     name := "scalaz-tests",
-    crossScalaVersions := List(scala211, scala212),
+    crossScalaVersions := supportedScalaVersions,
     libraryDependencies ++= Seq(
-      "org.scalaz" %% "scalaz-core" % "7.2.27" % Test,
+      "org.scalaz" %% "scalaz-core" % "7.2.33" % Test,
     )
   )
   .settings(testSettings)
@@ -95,8 +95,8 @@ lazy val wartRemoverTests = (project in file("wartremover-tests"))
   .dependsOn(pluginTests % "compile->compile;test->test")
   .settings(
     name := "wartremover-tests",
-    crossScalaVersions := List(scala212),
-    addCompilerPlugin("org.wartremover" %% "wartremover" % "2.4.2"),
+    crossScalaVersions := supportedScalaVersions,
+    addCompilerPlugin("org.wartremover" %% "wartremover" % "2.4.3"),
     scalacOptions += "-P:wartremover:traverser:org.wartremover.warts.NonUnitStatements"
   )
   .settings(testSettings)
diff --git a/project/build.properties b/project/build.properties
index dca663d..dd4ff43 100644
--- a/project/build.properties
+++ b/project/build.properties
@@ -1 +1 @@
-sbt.version = 1.2.8
+sbt.version = 1.6.1
diff --git a/project/plugins.sbt b/project/plugins.sbt
index 9eb61c9..4188cc3 100644
--- a/project/plugins.sbt
+++ b/project/plugins.sbt
@@ -1,2 +1,2 @@
-addSbtPlugin("org.xerial.sbt" % "sbt-sonatype" % "2.3")
-addSbtPlugin("com.jsuereth" % "sbt-pgp" % "1.1.1")
+addSbtPlugin("org.xerial.sbt" % "sbt-sonatype" % "3.9.10")
+addSbtPlugin("com.github.sbt" % "sbt-pgp" % "2.1.2")