diff --git a/forge-gui/src/main/java/forge/gamemodes/gauntlet/GauntletIO.java b/forge-gui/src/main/java/forge/gamemodes/gauntlet/GauntletIO.java
index b1233c1bebe..28ca4ecca8d 100644
--- a/forge-gui/src/main/java/forge/gamemodes/gauntlet/GauntletIO.java
+++ b/forge-gui/src/main/java/forge/gamemodes/gauntlet/GauntletIO.java
@@ -60,6 +60,7 @@ public class GauntletIO {
         xStream.allowTypeHierarchy(String.class);
         xStream.allowTypeHierarchy(EnumMap.class);
         xStream.allowTypeHierarchy(ArrayList.class);
+        xStream.allowTypeHierarchy(PaperCard.class);
         xStream.allowTypeHierarchy(CardPool.class);
         xStream.allowTypeHierarchy(SortedSet.class);
         xStream.allowTypeHierarchy(Deck.class);