diff --git a/Mage.Sets/src/mage/sets/MysteryBooster.java b/Mage.Sets/src/mage/sets/MysteryBooster.java
index b833d778a17..d017e31412d 100644
--- a/Mage.Sets/src/mage/sets/MysteryBooster.java
+++ b/Mage.Sets/src/mage/sets/MysteryBooster.java
@@ -23,7 +23,7 @@ public final class MysteryBooster extends ExpansionSet {
     }
 
     private MysteryBooster() {
-        super("Mystery Booster", "MB1", ExpansionSet.buildDate(2020, 3, 13), SetType.EXPANSION);
+        super("Mystery Booster", "MB1", ExpansionSet.buildDate(2020, 3, 13), SetType.SUPPLEMENTAL);
         this.hasBoosters = true;
 
         cards.add(new SetCardInfo("Absorb Vis", 558, Rarity.COMMON, mage.cards.a.AbsorbVis.class));