diff --git a/app/src/main/java/org/ntlab/acanthus_client/views/MainActivity.java b/app/src/main/java/org/ntlab/acanthus_client/views/MainActivity.java
index da35e65..cde184d 100644
--- a/app/src/main/java/org/ntlab/acanthus_client/views/MainActivity.java
+++ b/app/src/main/java/org/ntlab/acanthus_client/views/MainActivity.java
@@ -23,6 +23,7 @@
         super.onCreate(savedInstanceState);
 
         binding = ActivityMainBinding.inflate(getLayoutInflater());
+        setTheme(R.style.Theme_Acanthus);
         setContentView(binding.getRoot());
 
         BottomNavigationView navView = findViewById(R.id.nav_view);