diff --git a/tabby-terminal/src/components/appearanceSettingsTab.component.pug b/tabby-terminal/src/components/appearanceSettingsTab.component.pug
index 4c0b046d..83c9d5b5 100644
--- a/tabby-terminal/src/components/appearanceSettingsTab.component.pug
+++ b/tabby-terminal/src/components/appearanceSettingsTab.component.pug
@@ -17,7 +17,7 @@ h3.mb-3(translate) Appearance
                     type='number',
                     max='48',
                     [(ngModel)]='config.store.terminal.fontSize',
-                    (ngModelChange)='config.save()',
+                    (ngModelChange)='fixFontSize(); config.save()',
                 )
 
         .form-line
diff --git a/tabby-terminal/src/components/appearanceSettingsTab.component.ts b/tabby-terminal/src/components/appearanceSettingsTab.component.ts
index e33c45c5..4671c594 100644
--- a/tabby-terminal/src/components/appearanceSettingsTab.component.ts
+++ b/tabby-terminal/src/components/appearanceSettingsTab.component.ts
@@ -42,4 +42,10 @@ export class AppearanceSettingsTabComponent {
             this.config.requestRestart()
         }
     }
+
+    fixFontSize () {
+        if (this.config.store.terminal.fontSize > 100) {
+            this.config.store.terminal.fontSize = 12
+        }
+    }
 }