diff --git a/src/main/java/the/bytecode/club/bytecodeviewer/BytecodeViewer.java b/src/main/java/the/bytecode/club/bytecodeviewer/BytecodeViewer.java
index 44f443353..236790040 100644
--- a/src/main/java/the/bytecode/club/bytecodeviewer/BytecodeViewer.java
+++ b/src/main/java/the/bytecode/club/bytecodeviewer/BytecodeViewer.java
@@ -2,14 +2,14 @@
 
 import com.google.gson.Gson;
 import com.google.gson.GsonBuilder;
+
+import java.awt.*;
 import java.io.File;
 import java.io.IOException;
-import java.util.ArrayList;
-import java.util.Collection;
-import java.util.LinkedHashMap;
+import java.util.*;
 import java.util.List;
-import java.util.Map;
-import javax.swing.SwingUtilities;
+import javax.swing.*;
+
 import me.konloch.kontainer.io.DiskReader;
 import org.apache.commons.io.FileUtils;
 import org.objectweb.asm.tree.ClassNode;
@@ -22,6 +22,8 @@
 import the.bytecode.club.bytecodeviewer.gui.MainViewerGUI;
 import the.bytecode.club.bytecodeviewer.gui.components.ExtendedJOptionPane;
 import the.bytecode.club.bytecodeviewer.gui.components.MultipleChoiceDialog;
+import the.bytecode.club.bytecodeviewer.gui.components.SearchableJTextArea;
+import the.bytecode.club.bytecodeviewer.gui.components.SearchableRSyntaxTextArea;
 import the.bytecode.club.bytecodeviewer.gui.resourcelist.ResourceListIconRenderer;
 import the.bytecode.club.bytecodeviewer.gui.resourceviewer.TabbedPane;
 import the.bytecode.club.bytecodeviewer.gui.resourceviewer.viewer.ClassViewer;
@@ -751,4 +753,31 @@ public static void cleanup()
      * because Smali and Baksmali System.exit if it failed
      */
     public static void exit(int i) { }
+
+    /**
+     * Updates all UI components fonts.
+     *
+     * @implNote {@link SearchableRSyntaxTextArea} and {@link SearchableJTextArea}
+     * do not update until "Refresh" button is clicked.
+     *
+     * @param font The font to change everything to.
+     */
+    public static void updateAllFonts(Font font) {
+        Enumeration<Object> enumeration = UIManager.getDefaults().keys();
+        while (enumeration.hasMoreElements()) {
+            Object key = enumeration.nextElement();
+            Object value = UIManager.get (key);
+            if (value instanceof Font)
+                UIManager.put (key, font);
+        }
+    }
+
+    /**
+     * Updates all swing components.
+     */
+    public static void updateUI() {
+        for (Window w : Window.getWindows()) {
+            SwingUtilities.updateComponentTreeUI(w);
+        }
+    }
 }
diff --git a/src/main/java/the/bytecode/club/bytecodeviewer/gui/MainViewerGUI.java b/src/main/java/the/bytecode/club/bytecodeviewer/gui/MainViewerGUI.java
index a7e177fba..f81342342 100644
--- a/src/main/java/the/bytecode/club/bytecodeviewer/gui/MainViewerGUI.java
+++ b/src/main/java/the/bytecode/club/bytecodeviewer/gui/MainViewerGUI.java
@@ -1,27 +1,15 @@
 package the.bytecode.club.bytecodeviewer.gui;
 
-import java.awt.Component;
-import java.awt.Dimension;
-import java.awt.KeyboardFocusManager;
+import java.awt.*;
 import java.io.File;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
-import javax.swing.BoxLayout;
-import javax.swing.ButtonGroup;
-import javax.swing.JCheckBoxMenuItem;
-import javax.swing.JFrame;
-import javax.swing.JMenu;
-import javax.swing.JMenuBar;
-import javax.swing.JMenuItem;
-import javax.swing.JPanel;
-import javax.swing.JRadioButtonMenuItem;
-import javax.swing.JSeparator;
-import javax.swing.JSpinner;
-import javax.swing.JSplitPane;
-import javax.swing.SpinnerNumberModel;
-import javax.swing.SwingUtilities;
+import javax.swing.*;
+import javax.swing.event.ChangeEvent;
+import javax.swing.event.ChangeListener;
+
 import the.bytecode.club.bytecodeviewer.BytecodeViewer;
 import the.bytecode.club.bytecodeviewer.Configuration;
 import the.bytecode.club.bytecodeviewer.Constants;
@@ -466,6 +454,18 @@ public void buildSettingsMenu()
         fontSpinner.setPreferredSize(new Dimension(60, 24));
         fontSpinner.setMinimumSize(new Dimension(60, 24));
         fontSpinner.setModel(new SpinnerNumberModel(12, 1, null, 1));
+        fontSpinner.addChangeListener(e -> {
+			JSpinner spinner = (JSpinner) e.getSource();
+			Font font = UIManager.getFont("defaultFont");
+			if (font == null) {
+				font = UIManager.getFont("Label.font");
+			}
+
+			font = font.deriveFont((float) (int) spinner.getValue());
+
+			BytecodeViewer.updateAllFonts(font);
+			BytecodeViewer.updateUI();
+		});
         fontSize.add(fontSpinner);
         
         apkConversionSecondaryMenu.add(decodeAPKResources);