diff --git a/pom.xml b/pom.xml
index 90aee2668..b682f693d 100644
--- a/pom.xml
+++ b/pom.xml
@@ -298,6 +298,41 @@
 					</compilerArgs>
 				</configuration>
 			</plugin>
+			<plugin>
+				<groupId>org.codehaus.mojo</groupId>
+				<artifactId>exec-maven-plugin</artifactId>
+				<version>3.0.0</version>
+				<executions>
+					<execution>
+						<id>compile-light-theme</id>
+						<phase>compile</phase>
+						<goals>
+							<goal>java</goal>
+						</goals>
+						<configuration>
+							<mainClass>javafx.graphics/com.sun.javafx.css.parser.Css2Bin</mainClass>
+							<arguments>
+								<arg>${project.basedir}/src/main/resources/css/light_theme.css</arg>
+								<arg>${project.build.outputDirectory}/css/light_theme.bss</arg>
+							</arguments>
+						</configuration>
+					</execution>
+					<execution>
+						<id>compile-dark-theme</id>
+						<phase>compile</phase>
+						<goals>
+							<goal>java</goal>
+						</goals>
+						<configuration>
+							<mainClass>javafx.graphics/com.sun.javafx.css.parser.Css2Bin</mainClass>
+							<arguments>
+								<arg>${project.basedir}/src/main/resources/css/dark_theme.css</arg>
+								<arg>${project.build.outputDirectory}/css/dark_theme.bss</arg>
+							</arguments>
+						</configuration>
+					</execution>
+				</executions>
+			</plugin>
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-jar-plugin</artifactId>
diff --git a/src/main/java/org/cryptomator/ui/fxapp/FxApplicationStyle.java b/src/main/java/org/cryptomator/ui/fxapp/FxApplicationStyle.java
index da2a4a800..711da7948 100644
--- a/src/main/java/org/cryptomator/ui/fxapp/FxApplicationStyle.java
+++ b/src/main/java/org/cryptomator/ui/fxapp/FxApplicationStyle.java
@@ -83,12 +83,26 @@ public class FxApplicationStyle {
 	}
 
 	private void applyLightTheme() {
-		Application.setUserAgentStylesheet(getClass().getResource("/css/light_theme.css").toString());
-		appearanceProvider.ifPresent(provider -> provider.adjustToTheme(Theme.LIGHT));
+		var stylesheet = Optional //
+				.ofNullable(getClass().getResource("/css/light_theme.bss")) //
+				.orElse(getClass().getResource("/css/light_theme.css"));
+		if (stylesheet == null) {
+			LOG.warn("Failed to load light_theme stylesheet");
+		} else {
+			Application.setUserAgentStylesheet(stylesheet.toString());
+			appearanceProvider.ifPresent(provider -> provider.adjustToTheme(Theme.LIGHT));
+		}
 	}
 
 	private void applyDarkTheme() {
-		Application.setUserAgentStylesheet(getClass().getResource("/css/dark_theme.css").toString());
-		appearanceProvider.ifPresent(provider -> provider.adjustToTheme(Theme.DARK));
+		var stylesheet = Optional //
+				.ofNullable(getClass().getResource("/css/dark_theme.bss")) //
+				.orElse(getClass().getResource("/css/dark_theme.css"));
+		if (stylesheet == null) {
+			LOG.warn("Failed to load dark_theme stylesheet");
+		} else {
+			Application.setUserAgentStylesheet(stylesheet.toString());
+			appearanceProvider.ifPresent(provider -> provider.adjustToTheme(Theme.DARK));
+		}
 	}
 }