diff --git a/.scalafmt.conf b/.scalafmt.conf
index 3d74380..f77a401 100644
--- a/.scalafmt.conf
+++ b/.scalafmt.conf
@@ -1,3 +1,3 @@
-version="3.4.3" 
+version="3.5.0" 
 maxColumn = 120
 runner.dialect = scala3
diff --git a/Dockerfile b/Dockerfile
index 24ea0ee..7f7a7a4 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,12 +1,12 @@
 FROM adoptopenjdk/openjdk16:alpine AS base-builder
-ARG SBT_VERSION=1.3.13
+ARG SBT_VERSION=1.6.2
 RUN apk add --no-cache bash
 ENV JAVA_HOME="/usr/lib/jvm/default-jvm/"
 ENV PATH=$PATH:${JAVA_HOME}/bin
 RUN \
 	wget -O sbt-$SBT_VERSION.tgz https://github.com/sbt/sbt/releases/download/v$SBT_VERSION/sbt-$SBT_VERSION.tgz && \
-  	tar -xzvf sbt-$SBT_VERSION.tgz && \
-  	rm sbt-$SBT_VERSION.tgz
+        tar -xzvf sbt-$SBT_VERSION.tgz && \
+        rm sbt-$SBT_VERSION.tgz
 
 ENV PATH=$PATH:/sbt/bin/
 
@@ -30,7 +30,7 @@ ENV PATH=$PATH:${JAVA_HOME}/bin
 
 FROM base-core
 WORKDIR /lc-core
-COPY --from=builder /build/target/scala-2.13/LibreCaptcha.jar .
+COPY --from=builder /build/target/scala-3.1.1/LibreCaptcha.jar .
 RUN mkdir data/
 
 EXPOSE 8888
diff --git a/docker-compose.yml b/docker-compose.yml
index d8a9eec..e262418 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -3,7 +3,9 @@ version: "3.6"
 services:
   lc-core:
     container_name: "libre-captcha"
-    image: librecaptcha/lc-core:1.0.0-stable
+    image: librecaptcha/lc-core:latest
+    # Comment "image" & uncomment "build" if you intend to build from source
+    #build: .
     volumes: 
       - "./docker-data:/lc-core/data"
     ports: 
diff --git a/src/main/scala/lc/Main.scala b/src/main/scala/lc/Main.scala
index 5bdd849..3d2ac9c 100644
--- a/src/main/scala/lc/Main.scala
+++ b/src/main/scala/lc/Main.scala
@@ -26,13 +26,12 @@ object LCFramework {
       corsHeader = config.corsHeader
     )
 
-    Runtime.getRuntime.addShutdownHook( new Thread {
-        override def run(): Unit = {
-          println("Shutting down gracefully...")
-          backgroundTask.shutdown()
-        }
+    Runtime.getRuntime.addShutdownHook(new Thread {
+      override def run(): Unit = {
+        println("Shutting down gracefully...")
+        backgroundTask.shutdown()
       }
-    )
+    })
 
     server.start()
   }
diff --git a/src/main/scala/lc/background/taskThread.scala b/src/main/scala/lc/background/taskThread.scala
index 98b05b9..8b1ca5c 100644
--- a/src/main/scala/lc/background/taskThread.scala
+++ b/src/main/scala/lc/background/taskThread.scala
@@ -26,7 +26,7 @@ class BackgroundTask(config: Config, captchaManager: CaptchaManager) {
             val countExisting = captchaManager.getCount(param).getOrElse(0)
             val countRequired = requiredCountPerCombination - countExisting
             if (countRequired > 0) {
-              val countCreate = Math.min(1.0 + requiredCountPerCombination/10.0, countRequired).toInt
+              val countCreate = Math.min(1.0 + requiredCountPerCombination / 10.0, countRequired).toInt
               println(s"Creating $countCreate of $countRequired captchas for $param")
 
               for (i <- 0 until countCreate) {
@@ -42,10 +42,10 @@ class BackgroundTask(config: Config, captchaManager: CaptchaManager) {
   }
 
   private def allParameterCombinations(): List[Parameters] = {
-    (config.captchaConfig).flatMap {captcha =>
-      (captcha.allowedLevels).flatMap {level =>
-        (captcha.allowedMedia).flatMap {media =>
-          (captcha.allowedInputType).flatMap {inputType =>
+    (config.captchaConfig).flatMap { captcha =>
+      (captcha.allowedLevels).flatMap { level =>
+        (captcha.allowedMedia).flatMap { media =>
+          (captcha.allowedInputType).flatMap { inputType =>
             (captcha.allowedSizes).map {size =>
               Parameters(level, media, inputType, size)
             }
diff --git a/src/main/scala/lc/database/DB.scala b/src/main/scala/lc/database/DB.scala
index 3acc3ce..edb4da3 100644
--- a/src/main/scala/lc/database/DB.scala
+++ b/src/main/scala/lc/database/DB.scala
@@ -3,7 +3,8 @@ package lc.database
 import java.sql.{Connection, DriverManager, Statement}
 
 class DBConn() {
-  val con: Connection = DriverManager.getConnection("jdbc:h2:./data/H2/captcha3;MAX_COMPACT_TIME=8000;DB_CLOSE_ON_EXIT=FALSE", "sa", "")
+  val con: Connection =
+    DriverManager.getConnection("jdbc:h2:./data/H2/captcha3;MAX_COMPACT_TIME=8000;DB_CLOSE_ON_EXIT=FALSE", "sa", "")
 
   def getStatement(): Statement = {
     con.createStatement()
diff --git a/src/main/scala/lc/server/Server.scala b/src/main/scala/lc/server/Server.scala
index 12cc416..4801925 100644
--- a/src/main/scala/lc/server/Server.scala
+++ b/src/main/scala/lc/server/Server.scala
@@ -13,7 +13,13 @@ import java.net.InetSocketAddress
 import java.util
 import scala.jdk.CollectionConverters._
 
-class Server(address: String, port: Int, captchaManager: CaptchaManager, playgroundEnabled: Boolean, corsHeader: String) {
+class Server(
+    address: String,
+    port: Int,
+    captchaManager: CaptchaManager,
+    playgroundEnabled: Boolean,
+    corsHeader: String
+) {
   var headerMap: util.Map[String, util.List[String]] = _
   if (corsHeader.nonEmpty) {
     headerMap = Map("Access-Control-Allow-Origin" -> List(corsHeader).asJava).asJava