diff --git a/src/main/java/seedu/us/among/commons/core/GuiSettings.java b/src/main/java/seedu/us/among/commons/core/GuiSettings.java
index fd0b7c98eb4..bd1b152c1e7 100644
--- a/src/main/java/seedu/us/among/commons/core/GuiSettings.java
+++ b/src/main/java/seedu/us/among/commons/core/GuiSettings.java
@@ -12,7 +12,7 @@ public class GuiSettings implements Serializable {
 
     private static final double DEFAULT_HEIGHT = 600;
     private static final double DEFAULT_WIDTH = 740;
-    private static final String DEFAULT_THEME = "imposter";
+    private static final String DEFAULT_THEME = "material";
 
     private final double windowWidth;
     private final double windowHeight;
diff --git a/src/main/resources/view/MainWindow.fxml b/src/main/resources/view/MainWindow.fxml
index 4cd6b452919..0a236a94040 100644
--- a/src/main/resources/view/MainWindow.fxml
+++ b/src/main/resources/view/MainWindow.fxml
@@ -18,7 +18,7 @@
   <scene>
     <Scene>
       <stylesheets>
-        <URL value="@MaterialTheme.css" />
+        <URL value="@ImposterTheme.css" />
         <URL value="@Extensions.css" />
       </stylesheets>
 
diff --git a/src/test/java/seedu/us/among/storage/JsonUserPrefsStorageTest.java b/src/test/java/seedu/us/among/storage/JsonUserPrefsStorageTest.java
index 5e4503c70d0..49893266b81 100644
--- a/src/test/java/seedu/us/among/storage/JsonUserPrefsStorageTest.java
+++ b/src/test/java/seedu/us/among/storage/JsonUserPrefsStorageTest.java
@@ -72,7 +72,7 @@ public void readUserPrefs_extraValuesInFile_extraValuesIgnored() throws DataConv
 
     private UserPrefs getTypicalUserPrefs() {
         UserPrefs userPrefs = new UserPrefs();
-        userPrefs.setGuiSettings(new GuiSettings(1000, 500, 300, 100, "imposter"));
+        userPrefs.setGuiSettings(new GuiSettings(1000, 500, 300, 100, "material"));
         userPrefs.setEndpointListFilePath(Paths.get("imposter.json"));
         return userPrefs;
     }