diff --git a/src/main/java/org/cyclops/everlastingabilities/ability/AbilityTypeSpecialStepAssist.java b/src/main/java/org/cyclops/everlastingabilities/ability/AbilityTypeSpecialStepAssist.java
index 368c9239..74f39f40 100644
--- a/src/main/java/org/cyclops/everlastingabilities/ability/AbilityTypeSpecialStepAssist.java
+++ b/src/main/java/org/cyclops/everlastingabilities/ability/AbilityTypeSpecialStepAssist.java
@@ -1,14 +1,19 @@
 package org.cyclops.everlastingabilities.ability;
 
+import com.google.common.collect.Maps;
 import com.mojang.serialization.Codec;
+import net.minecraft.world.entity.ai.attributes.AttributeInstance;
+import net.minecraft.world.entity.ai.attributes.AttributeModifier;
 import net.minecraft.world.entity.player.Player;
 import net.minecraft.world.item.Rarity;
+import net.minecraftforge.common.ForgeMod;
 import net.minecraftforge.common.crafting.conditions.ICondition;
 import org.cyclops.everlastingabilities.Reference;
 import org.cyclops.everlastingabilities.RegistryEntries;
 import org.cyclops.everlastingabilities.api.AbilityTypeAdapter;
 import org.cyclops.everlastingabilities.api.IAbilityType;
 
+import java.util.Map;
 import java.util.Objects;
 
 /**
@@ -17,14 +22,19 @@
  */
 public class AbilityTypeSpecialStepAssist extends AbilityTypeAdapter {
 
-    private static final String PLAYER_NBT_KEY = Reference.MOD_ID + ":" + "stepAssist";
-    private final boolean forceDefaultStepHeight;
+    @Deprecated
+    private final boolean forceDefaultStepHeight; // TODO: rm in next MC version
+    private final Map<Integer, AttributeModifier> attributeModifiers;
 
     public AbilityTypeSpecialStepAssist(ICondition condition, String name, Rarity rarity, int maxLevel, int baseXpPerLevel,
                                         boolean obtainableOnPlayerSpawn, boolean obtainableOnMobSpawn, boolean obtainableOnCraft, boolean obtainableOnLoot,
                                         boolean forceDefaultStepHeight) {
         super(condition, name, rarity, maxLevel, baseXpPerLevel, obtainableOnPlayerSpawn, obtainableOnMobSpawn, obtainableOnCraft, obtainableOnLoot);
         this.forceDefaultStepHeight = forceDefaultStepHeight;
+        this.attributeModifiers = Maps.newHashMap();
+        for (int i = 1; i <= maxLevel; i++) {
+            this.attributeModifiers.put(i, new AttributeModifier(Reference.MOD_ID + ":stepHeightModifier" + i, i, AttributeModifier.Operation.ADDITION));
+        }
     }
 
     @Override
@@ -36,24 +46,16 @@ public boolean isForceDefaultStepHeight() {
         return forceDefaultStepHeight;
     }
 
-    @Override
-    public void onTick(Player player, int level) {
-        player.setMaxUpStep(player.isCrouching() ? 0.5F : level);
-    }
-
     @Override
     public void onChangedLevel(Player player, int oldLevel, int newLevel) {
-        if (oldLevel > 0 && newLevel == 0) {
-            float stepHeight = 0.6F;
-            if(player.getPersistentData().contains(PLAYER_NBT_KEY)) {
-                if (!this.isForceDefaultStepHeight()) {
-                    stepHeight = player.getPersistentData().getFloat(PLAYER_NBT_KEY);
-                }
-                player.getPersistentData().remove(PLAYER_NBT_KEY);
+        AttributeInstance attribute = player.getAttribute(ForgeMod.STEP_HEIGHT_ADDITION.get());
+        if (attribute != null) {
+            if (oldLevel > 0) {
+                attribute.removeModifier(this.attributeModifiers.get(oldLevel));
+            }
+            if (newLevel > 0) {
+                attribute.addPermanentModifier(this.attributeModifiers.get(newLevel));
             }
-            player.setMaxUpStep(stepHeight);
-        } else if (oldLevel == 0 && newLevel > 0) {
-            player.getPersistentData().putFloat(PLAYER_NBT_KEY, player.maxUpStep());
         }
     }
 }