diff --git a/core/src/com/unciv/logic/civilization/CivRankingHistory.kt b/core/src/com/unciv/logic/civilization/CivRankingHistory.kt
index 45527fe9e3..25475491fa 100644
--- a/core/src/com/unciv/logic/civilization/CivRankingHistory.kt
+++ b/core/src/com/unciv/logic/civilization/CivRankingHistory.kt
@@ -31,17 +31,9 @@ class CivRankingHistory : HashMap<Int, Map<RankingType, Int>>(), IsPartOfGameInf
     override fun write(json: Json) {
         for ((turn, rankings) in this) {
 
-            // Old format - deprecated 4.12.18
-            json.writeObjectStart(turn.toString())
-            for ((rankingType, score) in rankings) {
-                json.writeValue(rankingType.idForSerialization.toString(), score)
-            }
-            json.writeObjectEnd()
-
-            // New format (disabled)
-//            val rankingsString = rankings.entries
-//                .joinToString("") { it.key.idForSerialization.toString() + it.value }
-//            json.writeValue(turn.toString(), rankingsString)
+            val rankingsString = rankings.entries
+                .joinToString("") { it.key.idForSerialization.toString() + it.value }
+            json.writeValue(turn.toString(), rankingsString)
         }
     }