diff --git a/src/battle.ts b/src/battle.ts
index 6c98b7e..4a040e2 100644
--- a/src/battle.ts
+++ b/src/battle.ts
@@ -115,7 +115,7 @@ export class Battle {
             for (const status of unit.potencyEffects) {
                 status.duration--;
             }
-            unit.potencyEffects.filter(Battle.buffIsActive);
+            unit.potencyEffects = unit.potencyEffects.filter(Battle.buffIsActive);
         }
         this.appendLog('');
     }
@@ -258,12 +258,12 @@ export class Battle {
                 target.statusEffects.stun = 0;
                 target.statusEffects.poison = 0;
                 target.statusEffects.taunt = 0;
-                target.potencyEffects.filter(Battle.isBuff);
+                target.potencyEffects = target.potencyEffects.filter(Battle.isBuff);
             }
             if (effect.dispel) {
                 this.appendLog(`(${target.team}) ${target.character.nameShort} was dispelled of buffs!`);
                 target.statusEffects.regeneration = 0;
-                target.potencyEffects.filter(Battle.isDebuff);
+                target.potencyEffects = target.potencyEffects.filter(Battle.isDebuff);
             }
             if (effect.poison) {
                 target.statusEffects.poison = Math.max(target.statusEffects.poison, effect.poison);