diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index a8c9ff40..68239da4 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -10,7 +10,7 @@ jobs:
   build:
     strategy:
       matrix:
-        scalaVersion: ["2.13.12"]
+        scalaVersion: ["2.13.12", "3.3.1"]
     runs-on: ubuntu-20.04
 
     steps:
@@ -71,8 +71,6 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-20.04]
-        scala: [2.13.12]
-        java: [adopt@1.8]
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v2
diff --git a/build.sbt b/build.sbt
index 948a31c5..e504cd0b 100644
--- a/build.sbt
+++ b/build.sbt
@@ -3,7 +3,8 @@ Global / onChangedBuildSource := ReloadOnSourceChanges
 inThisBuild(
   Seq(
     organization           := "io.github.fun-stack",
-    scalaVersion           := "2.13.12",
+    scalaVersion           := crossScalaVersions.value.last,
+    crossScalaVersions     := Seq("2.13.12", "3.3.1"),
     licenses               := Seq("MIT License" -> url("https://opensource.org/licenses/MIT")),
     homepage               := Some(url("https://github.com/fun-stack/fun-stack-scala")),
     scmInfo                := Some(
@@ -64,8 +65,8 @@ lazy val backend = project
     name                 := "fun-stack-backend",
     libraryDependencies ++=
       Deps.cats.effect.value ::
-        Deps.awsSdkJS.sns.value ::
-        Deps.awsSdkJS.cognitoidentityprovider.value ::
+        Deps.awsSdkJS.sns.value.cross(CrossVersion.for3Use2_13) ::
+        Deps.awsSdkJS.cognitoidentityprovider.value.cross(CrossVersion.for3Use2_13) ::
         Deps.sloth.value ::
         Deps.mycelium.core.value ::
         Nil,
@@ -79,7 +80,7 @@ lazy val lambdaApigateway = project
     name                 := "fun-stack-lambda-apigateway",
     libraryDependencies ++=
       Deps.cats.effect.value ::
-        Deps.awsLambdaJS.value ::
+        Deps.awsLambdaJS.value.cross(CrossVersion.for3Use2_13) ::
         Nil,
   )
 
@@ -146,8 +147,8 @@ lazy val lambdaWsEventAuthorizer = project
     name                 := "fun-stack-lambda-ws-event-authorizer",
     libraryDependencies ++=
       Deps.cats.effect.value ::
-        Deps.awsSdkJS.sns.value ::
-        Deps.awsLambdaJS.value ::
+        Deps.awsSdkJS.sns.value.cross(CrossVersion.for3Use2_13) ::
+        Deps.awsLambdaJS.value.cross(CrossVersion.for3Use2_13) ::
         Deps.sloth.value ::
         Nil,
   )
@@ -181,7 +182,7 @@ lazy val clientNode = project
   .settings(
     name                       := "fun-stack-client-node",
     libraryDependencies       ++=
-      Deps.awsSdkJS.cognitoidentityprovider.value ::
+      Deps.awsSdkJS.cognitoidentityprovider.value.cross(CrossVersion.for3Use2_13) ::
         Nil,
     Compile / npmDependencies ++=
       NpmDeps.nodeFetch ::