diff --git a/modules/time-calc-app/pom.xml b/modules/time-calc-app/pom.xml
index 528d1d9..a9c6b98 100644
--- a/modules/time-calc-app/pom.xml
+++ b/modules/time-calc-app/pom.xml
@@ -67,6 +67,11 @@
             <artifactId>sqlite-jdbc</artifactId>
             <version>3.41.2.1</version>
         </dependency>
+        <dependency>
+            <groupId>com.formdev</groupId>
+            <artifactId>flatlaf</artifactId>
+            <version>3.4.1</version>
+        </dependency>
     </dependencies>
 
 </project>
\ No newline at end of file
diff --git a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/app/Main.java b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/app/Main.java
index ea4061f..d4eb83b 100644
--- a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/app/Main.java
+++ b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/app/Main.java
@@ -1,5 +1,7 @@
 package org.nanoboot.utils.timecalc.app;
 
+import com.formdev.flatlaf.FlatLightLaf;
+
 import java.io.IOException;
 
 /**
@@ -15,6 +17,7 @@ public class Main {
 //                f.delete();
 //            }
 //        }
+        FlatLightLaf.setup();
         if(ONLY_ACTIVITIES_WINDOW_IS_ALLOWED) {
             ActivitiesMain.main(args);
         } else {