diff --git a/buildSrc/src/main/kotlin/BuildConfig.kt b/buildSrc/src/main/kotlin/BuildConfig.kt
index 881d72ccab..85fe49884d 100644
--- a/buildSrc/src/main/kotlin/BuildConfig.kt
+++ b/buildSrc/src/main/kotlin/BuildConfig.kt
@@ -3,8 +3,8 @@ package com.unciv.build
 object BuildConfig {
     const val kotlinVersion = "1.3.71"
     const val appName = "Unciv"
-    const val appCodeNumber = 448
-    const val appVersion = "3.9.12"
+    const val appCodeNumber = 449
+    const val appVersion = "3.9.13"
 
     const val gdxVersion = "1.9.10"
     const val roboVMVersion = "2.3.1"
diff --git a/changelog.md b/changelog.md
index 79d38eec8c..0d340c0041 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,3 +1,17 @@
+## 3.9.13
+
+Simplified translation file generation
+
+Background work for "generic-ifying" unit and building uniques for modding purposes
+
+Worker unique is now moddable to other units
+
+By alkorolyov:
+- Spectators can enter and view other player cities
+- Fix map editor gameparameters layout
+
+Translation updates
+
 ## 3.9.12
 
 Added Water Mill building
diff --git a/core/src/com/unciv/ui/mapeditor/EditorMapHolder.kt b/core/src/com/unciv/ui/mapeditor/EditorMapHolder.kt
index 69a95cce3b..f1740e5274 100644
--- a/core/src/com/unciv/ui/mapeditor/EditorMapHolder.kt
+++ b/core/src/com/unciv/ui/mapeditor/EditorMapHolder.kt
@@ -19,8 +19,8 @@ class EditorMapHolder(internal val mapEditorScreen: MapEditorScreen, internal va
     internal fun addTiles(padding:Float) {
 
         val tileSetStrings = TileSetStrings()
-        for (tileGroup in tileMap.values.map { TileGroup(it, tileSetStrings) })
-            tileGroups[tileGroup.tileInfo] = tileGroup
+        for (tileInfo in tileMap.values)
+            tileGroups[tileInfo] = TileGroup(tileInfo, tileSetStrings)
 
         tileGroupMap = TileGroupMap(tileGroups.values, padding)
         actor = tileGroupMap