diff --git a/.scalafmt.conf b/.scalafmt.conf
index eeda3ba5..6c9d8265 100644
--- a/.scalafmt.conf
+++ b/.scalafmt.conf
@@ -1,4 +1,4 @@
-version=3.7.17
+version = 3.8.4-RC3
 runner.dialect = "scala213"
 fileOverride {
   "glob:**/scala-3/**" {
diff --git a/build.sbt b/build.sbt
index d92ea3d4..208bd9ac 100644
--- a/build.sbt
+++ b/build.sbt
@@ -1,5 +1,4 @@
 import org.scalajs.linker.interface.ESVersion
-
 import org.openqa.selenium.WebDriver
 import org.openqa.selenium.chrome.ChromeDriver
 import org.openqa.selenium.chrome.ChromeOptions
@@ -8,13 +7,16 @@ import org.openqa.selenium.firefox.FirefoxProfile
 import org.openqa.selenium.remote.server.DriverFactory
 import org.openqa.selenium.remote.server.DriverProvider
 
+import scala.Ordering.Implicits.*
 import org.scalajs.jsenv.jsdomnodejs.JSDOMNodeJSEnv
 import org.scalajs.jsenv.selenium.SeleniumJSEnv
 
 import java.util.concurrent.TimeUnit
-
 import org.commonmark.parser.Parser
 import org.commonmark.renderer.html.HtmlRenderer
+import org.typelevel.scalacoptions.ScalaVersion.V3_0_0
+import org.typelevel.scalacoptions.ScalacOption
+import org.typelevel.scalacoptions.ScalacOptions
 
 val disableWebsiteOnCI = true
 
@@ -124,9 +126,8 @@ inThisBuild(
   ),
 )
 
-lazy val commonSettings = Seq.concat(
-  ScalaOptions.fixOptions,
-  scalacOptions ++= {
+lazy val commonSettings = Seq(
+  tpolecatScalacOptions ++= {
     val sourcesGithubUrl  = s"https://raw.githubusercontent.com/tulz-app/laminext/${git.gitHeadCommit.value.get}/"
     val sourcesOptionName = CrossVersion.partialVersion(scalaVersion.value) match {
       case Some((2, _)) => "-P:scalajs:mapSourceURI"
@@ -134,10 +135,23 @@ lazy val commonSettings = Seq.concat(
       case _            => throw new RuntimeException(s"unexpected scalaVersion: ${scalaVersion.value}")
     }
     val moduleSourceRoot  = file("").toURI.toString
-    Seq(
-      s"$sourcesOptionName:$moduleSourceRoot->$sourcesGithubUrl"
+    Set(
+      ScalacOption(s"$sourcesOptionName:$moduleSourceRoot->$sourcesGithubUrl", _ => true)
     )
-  }
+  },
+  tpolecatExcludeOptions ++= Set(
+    ScalacOptions.warnDeadCode,
+    ScalacOptions.warnUnusedImports,
+  ),
+  Test / tpolecatExcludeOptions ++= Set(
+    ScalacOptions.warnValueDiscard,
+    ScalacOptions.warnUnusedImports,
+    ScalacOptions.warnUnusedLocals,
+    ScalacOptions.warnUnusedImplicits,
+    ScalacOptions.warnUnusedPatVars,
+    ScalacOptions.warnDeadCode,
+    ScalacOptions.warnNonUnitStatement
+  ),
 )
 
 lazy val baseDependencies = Seq(
diff --git a/modules/fsm/src/main/scala/io/laminext/fsm/AirFSM.scala b/modules/fsm/src/main/scala/io/laminext/fsm/AirFSM.scala
index 6309c759..1f1f2fe4 100644
--- a/modules/fsm/src/main/scala/io/laminext/fsm/AirFSM.scala
+++ b/modules/fsm/src/main/scala/io/laminext/fsm/AirFSM.scala
@@ -15,7 +15,7 @@ class AirFSM[State](initialState: State, initialStateRequests: EventStream[State
     var currentSubscription: Subscription = null
     ReactiveElement.bindSubscriptionUnsafe(element) { ctx =>
       currentSubscription = stateChangeRequests.writer.addSource(initialStateRequests)(ctx.owner)
-      stateChangeRequests.events.foreach { nextState =>
+      val _ = stateChangeRequests.events.foreach { nextState =>
         if (control.isDefinedAt((currentState, nextState))) {
           val nextStateChangeRequests = control((currentState, nextState))
           if (currentSubscription != null) {
diff --git a/modules/tailwind/src/main/scala/io/laminext/tailwind/modal/Modal.scala b/modules/tailwind/src/main/scala/io/laminext/tailwind/modal/Modal.scala
index 7db43adf..f832354d 100644
--- a/modules/tailwind/src/main/scala/io/laminext/tailwind/modal/Modal.scala
+++ b/modules/tailwind/src/main/scala/io/laminext/tailwind/modal/Modal.scala
@@ -50,13 +50,13 @@ object Modal {
 
   private def calculateScrollbarWidth(): Double = {
     val outer           = div(styleAttr("visibility: hidden; width: 100px; msOverflowStyle: scrollbar")).ref
-    dom.document.body.appendChild(outer)
+    val _               = dom.document.body.appendChild(outer)
     val widthNoScroll   = outer.offsetWidth
     outer.style.overflow = "scroll"
     val inner           = div(width := "100%").ref
-    outer.appendChild(inner)
+    val _               = outer.appendChild(inner)
     val widthWithScroll = inner.offsetWidth
-    outer.parentNode.removeChild(outer)
+    val _               = outer.parentNode.removeChild(outer)
     widthNoScroll - widthWithScroll
   }
 
diff --git a/modules/videojs/src/main/scala/io/laminext/videojs/api/VideoJSOptions.scala b/modules/videojs/src/main/scala/io/laminext/videojs/api/VideoJSOptions.scala
index 23790d2b..1de28cdf 100644
--- a/modules/videojs/src/main/scala/io/laminext/videojs/api/VideoJSOptions.scala
+++ b/modules/videojs/src/main/scala/io/laminext/videojs/api/VideoJSOptions.scala
@@ -45,6 +45,7 @@ object VideoJSOptions {
     if (sources.nonEmpty) obj.sources = sources.toJSArray
     if (techOrder.nonEmpty) obj.techOrder = techOrder.toJSArray
     aspectRatio.foreach(obj.aspectRatio = _)
+    bigPlayButton.foreach(obj.bigPlayButton = _)
     controlBar.foreach(obj.controlBar = _)
     defaultVolume.foreach(obj.defaultVolume = _)
     html5.foreach(obj.html5 = _)
diff --git a/modules/videojs/src/main/scala/io/laminext/videojs/api/components/Slider.scala b/modules/videojs/src/main/scala/io/laminext/videojs/api/components/Slider.scala
index 257894c1..9a4ea9fe 100644
--- a/modules/videojs/src/main/scala/io/laminext/videojs/api/components/Slider.scala
+++ b/modules/videojs/src/main/scala/io/laminext/videojs/api/components/Slider.scala
@@ -30,7 +30,7 @@ trait Slider extends Component {
   def disable(): Unit
 
   /**
-   * Create the `Slider`s DOM element.
+   * Create the `Slider` s DOM element.
    *
    * @param type
    *   Type of element to create.
@@ -93,8 +93,8 @@ trait Slider extends Component {
    *
    * @return
    *   The current position of the Slider.
-   *   - position.x for vertical `Slider`s
-   *   - position.y for horizontal `Slider`s
+   *   - position.x for vertical `Slider` s
+   *   - position.y for horizontal `Slider` s
    */
   def calculateDistance(event: EventTarget.Event): Double
 
diff --git a/modules/websocket/src/main/scala/io/laminext/websocket/WebSocket.scala b/modules/websocket/src/main/scala/io/laminext/websocket/WebSocket.scala
index b7c637c4..dffe746d 100644
--- a/modules/websocket/src/main/scala/io/laminext/websocket/WebSocket.scala
+++ b/modules/websocket/src/main/scala/io/laminext/websocket/WebSocket.scala
@@ -126,7 +126,7 @@ class WebSocket[Receive, Send](
       if (!bufferWhenDisconnected) {
         sendBuffer.clear()
       } else if (sendBuffer.size > bufferSize) {
-        sendBuffer.drop(sendBuffer.size - bufferSize)
+        val _ = sendBuffer.drop(sendBuffer.size - bufferSize)
       }
     }
     connectedWS.foreach { ws =>
diff --git a/project/DependencyVersions.scala b/project/DependencyVersions.scala
index ed77dd57..4a37f950 100644
--- a/project/DependencyVersions.scala
+++ b/project/DependencyVersions.scala
@@ -1,13 +1,13 @@
 object DependencyVersions {
 
   val jsdom        = "16.4.0"
-  val laminar      = "17.0.0"
+  val laminar      = "17.2.0"
   val `scala-test` = "3.2.9"
   val stringdiff   = "0.3.4"
   val domtestutils = "18.0.1"
-  val cats         = "2.10.0"
+  val cats         = "2.12.0"
   val upickle      = "3.2.0"
-  val circe        = "0.14.6"
+  val circe        = "0.14.9"
 
   // -- website
 
diff --git a/project/ScalaVersions.scala b/project/ScalaVersions.scala
index 4c0786c1..1b900677 100644
--- a/project/ScalaVersions.scala
+++ b/project/ScalaVersions.scala
@@ -1,4 +1,4 @@
 object ScalaVersions {
-  val v213 = "2.13.12"
-  val v3   = "3.3.1"
+  val v213 = "2.13.15"
+  val v3   = "3.3.4"
 }
diff --git a/project/build.properties b/project/build.properties
index 04267b14..e88a0d81 100644
--- a/project/build.properties
+++ b/project/build.properties
@@ -1 +1 @@
-sbt.version=1.9.9
+sbt.version=1.10.6
diff --git a/project/plugins.sbt b/project/plugins.sbt
index 04c98850..ecc26c7b 100644
--- a/project/plugins.sbt
+++ b/project/plugins.sbt
@@ -1,6 +1,6 @@
 logLevel := Level.Warn
 
-libraryDependencies += "org.commonmark" % "commonmark"               % "0.21.0"
+libraryDependencies += "org.commonmark" % "commonmark"               % "0.24.0"
 libraryDependencies += "org.scala-js"  %% "scalajs-env-nodejs"       % "1.4.0"
 libraryDependencies += "org.scala-js"  %% "scalajs-env-selenium"     % "1.1.1"
 libraryDependencies += "org.scala-js"  %% "scalajs-env-jsdom-nodejs" % "1.1.0"
@@ -9,16 +9,16 @@ addSbtPlugin("org.scala-js" % "sbt-scalajs" % "1.16.0")
 
 addSbtPlugin("org.scalameta" % "sbt-scalafmt" % "2.5.2")
 
-addSbtPlugin("com.github.sbt" % "sbt-pgp" % "2.2.1")
+addSbtPlugin("com.github.sbt" % "sbt-pgp" % "2.3.1")
 
-addSbtPlugin("org.xerial.sbt" % "sbt-sonatype" % "3.10.0")
+addSbtPlugin("org.xerial.sbt" % "sbt-sonatype" % "3.12.2")
 
-//addSbtPlugin("io.github.davidgregory084" % "sbt-tpolecat" % "0.3.1")
+addSbtPlugin("org.typelevel" % "sbt-tpolecat" % "0.5.2")
 
 addSbtPlugin("com.yurique" % "sbt-embedded-files" % "0.4.0")
 
-addSbtPlugin("com.github.sbt" % "sbt-github-actions" % "0.19.0")
+addSbtPlugin("com.github.sbt" % "sbt-github-actions" % "0.24.0")
 
-addSbtPlugin("com.github.sbt" % "sbt-ci-release" % "1.5.12")
+addSbtPlugin("com.github.sbt" % "sbt-ci-release" % "1.9.0")
 
-addSbtPlugin("com.eed3si9n" % "sbt-buildinfo" % "0.11.0")
+addSbtPlugin("com.eed3si9n" % "sbt-buildinfo" % "0.13.1")
diff --git a/website/src/main/scala/io/laminext/site/examples/websocket/WebSocketCirceExample.scala b/website/src/main/scala/io/laminext/site/examples/websocket/WebSocketCirceExample.scala
index 9c9633b2..6bf29da7 100644
--- a/website/src/main/scala/io/laminext/site/examples/websocket/WebSocketCirceExample.scala
+++ b/website/src/main/scala/io/laminext/site/examples/websocket/WebSocketCirceExample.scala
@@ -10,9 +10,6 @@ object WebSocketCirceExample
       description = FileAsString("description.md")
     )(() => {
       import com.raquo.laminar.api.L._
-      div(
-        "temporarily commenting this out – circe's not ready for scala 3-RC2"
-      )
 
       import com.raquo.laminar.api.L._
       import com.raquo.laminar.api.L.CollectionCommand
diff --git a/website/src/main/scala/io/laminext/site/layout/PageHeader.scala b/website/src/main/scala/io/laminext/site/layout/PageHeader.scala
index 0de5f661..127864e4 100644
--- a/website/src/main/scala/io/laminext/site/layout/PageHeader.scala
+++ b/website/src/main/scala/io/laminext/site/layout/PageHeader.scala
@@ -156,7 +156,7 @@ object PageHeader {
 
   private def moduleLink(
     currentPage: Signal[Option[(SiteModule, Page)]]
-  )(module: SiteModule) =
+  )(module: SiteModule)  =
     a(
       cls  := "border-b-2 px-2 border-transparent flex font-display tracking-wide",
       currentPage