diff --git a/build.gradle.kts b/build.gradle.kts
index abca8a40..7747424b 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -29,6 +29,9 @@ dependencies {
     implementation("br.com.devsrsouza.compose.icons.jetbrains:font-awesome:0.2.0")
     implementation("com.github.Syer10:compose-router:45a8c4fe83")
 
+    // UI (Swing)
+    implementation("com.github.weisj:darklaf-core:2.5.5")
+
     // Threading
     implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.4.3")
 
diff --git a/src/main/kotlin/ca/gosyer/ui/main/main.kt b/src/main/kotlin/ca/gosyer/ui/main/main.kt
index 43538844..46968add 100644
--- a/src/main/kotlin/ca/gosyer/ui/main/main.kt
+++ b/src/main/kotlin/ca/gosyer/ui/main/main.kt
@@ -17,12 +17,19 @@ import ca.gosyer.data.DataModule
 import ca.gosyer.data.server.ServerService
 import ca.gosyer.data.server.ServerService.ServerResult
 import ca.gosyer.data.ui.UiPreferences
+import ca.gosyer.data.ui.model.ThemeMode
 import ca.gosyer.data.ui.model.WindowSettings
 import ca.gosyer.ui.base.components.ErrorScreen
 import ca.gosyer.ui.base.components.LoadingScreen
 import ca.gosyer.ui.base.theme.AppTheme
+import ca.gosyer.util.system.getAsFlow
+import com.github.weisj.darklaf.LafManager
+import com.github.weisj.darklaf.theme.DarculaTheme
+import com.github.weisj.darklaf.theme.IntelliJTheme
 import com.github.zsoltk.compose.backpress.BackPressHandler
 import com.github.zsoltk.compose.backpress.LocalBackPressHandler
+import kotlinx.coroutines.GlobalScope
+import kotlinx.coroutines.flow.launchIn
 import org.apache.logging.log4j.core.config.Configurator
 import toothpick.configuration.Configuration
 import toothpick.ktp.KTP
@@ -56,6 +63,16 @@ fun main() {
 
     val serverService = scope.getInstance<ServerService>()
 
+    scope.getInstance<UiPreferences>().themeMode()
+        .getAsFlow {
+            val theme = when (it) {
+                ThemeMode.Light -> IntelliJTheme()
+                ThemeMode.Dark -> DarculaTheme()
+            }
+            LafManager.install(theme)
+        }
+        .launchIn(GlobalScope)
+
     val windowSettings = scope.getInstance<UiPreferences>().window()
     val (offset, size) = windowSettings.get().get()