diff --git a/scripts/perk_effects.gd b/scripts/perk_effects.gd
index dab5b6b..f6f221f 100644
--- a/scripts/perk_effects.gd
+++ b/scripts/perk_effects.gd
@@ -148,6 +148,7 @@ func _ready() -> void:
 	fsp.stats = _stat("Targets", str(witch.fireball_max_targets), str(witch.fireball_max_targets + 3))
 	fsp.spell = SpellLibrary.FIREBALL
 	fsp.icon = _icon_fireball
+	fsp.requires_mode = "fireball.cast:base"
 	fsp.effect = fireball_spread
 	available_perks.append(fsp)
 
@@ -243,6 +244,7 @@ func fireball_spread():
 	fsp.stats = _stat("Targets", str(witch.fireball_max_targets), str(witch.fireball_max_targets * 1.5))
 	fsp.spell = SpellLibrary.FIREBALL
 	fsp.icon = _icon_fireball
+	fsp.requires_mode = "fireball.cast:base"
 	fsp.effect = fireball_spread
 	available_perks.append(fsp)