diff --git a/Userland/Applications/Calendar/AddEventDialog.gml b/Userland/Applications/Calendar/AddEventDialog.gml
index 13670d9cac6..a0b11f2c9c3 100644
--- a/Userland/Applications/Calendar/AddEventDialog.gml
+++ b/Userland/Applications/Calendar/AddEventDialog.gml
@@ -120,7 +120,6 @@
             name: "duration_hour"
             fixed_size: [50, 20]
             min: 0
-            max: 999999
         }
 
         @GUI::SpinBox {
diff --git a/Userland/Applications/FontEditor/FontEditorWindow.gml b/Userland/Applications/FontEditor/FontEditorWindow.gml
index 0909c1ae843..b33efd0992a 100644
--- a/Userland/Applications/FontEditor/FontEditorWindow.gml
+++ b/Userland/Applications/FontEditor/FontEditorWindow.gml
@@ -35,6 +35,7 @@
                 @GUI::SpinBox {
                     name: "glyph_editor_width_spinbox"
                     preferred_width: "fit"
+                    min: 0
                 }
 
                 @GUI::CheckBox {
diff --git a/Userland/Libraries/LibGUI/FontPickerDialog.gml b/Userland/Libraries/LibGUI/FontPickerDialog.gml
index ddf0fe0afb9..854c5381c60 100644
--- a/Userland/Libraries/LibGUI/FontPickerDialog.gml
+++ b/Userland/Libraries/LibGUI/FontPickerDialog.gml
@@ -48,6 +48,7 @@
 
             @GUI::SpinBox {
                 name: "size_spin_box"
+                min: 0
             }
 
             @GUI::ListView {
diff --git a/Userland/Libraries/LibGUI/SpinBox.h b/Userland/Libraries/LibGUI/SpinBox.h
index c79ed42b35f..d288a839754 100644
--- a/Userland/Libraries/LibGUI/SpinBox.h
+++ b/Userland/Libraries/LibGUI/SpinBox.h
@@ -42,8 +42,8 @@ private:
     RefPtr<Button> m_increment_button;
     RefPtr<Button> m_decrement_button;
 
-    int m_min { 0 };
-    int m_max { 100 };
+    int m_min { NumericLimits<int>::min() };
+    int m_max { NumericLimits<int>::max() };
     int m_value { 0 };
 };