diff --git a/android/assets/jsons/Buildings.json b/android/assets/jsons/Buildings.json
index e4904395e1..077834ae8e 100644
--- a/android/assets/jsons/Buildings.json
+++ b/android/assets/jsons/Buildings.json
@@ -568,7 +568,7 @@
 		isWonder:true,
 		percentStatBonus:{culture:50},
 		uniques:["Free Social Policy","Can only be built in coastal cities"],
-		requiredTech:"Flight"
+		requiredTech:"Ecology"
 	},
 	{
 		name:"Spaceship Factory",
diff --git a/android/build.gradle b/android/build.gradle
index 62db2c6d73..38c469790b 100644
--- a/android/build.gradle
+++ b/android/build.gradle
@@ -21,8 +21,8 @@ android {
         applicationId "com.unciv.game"
         minSdkVersion 14
         targetSdkVersion 26
-        versionCode 155
-        versionName "2.9.8"
+        versionCode 157
+        versionName "2.9.9"
     }
     buildTypes {
         release {
diff --git a/core/src/com/unciv/logic/automation/WorkerAutomation.kt b/core/src/com/unciv/logic/automation/WorkerAutomation.kt
index 8858ac52da..3b4c133dc0 100644
--- a/core/src/com/unciv/logic/automation/WorkerAutomation.kt
+++ b/core/src/com/unciv/logic/automation/WorkerAutomation.kt
@@ -71,9 +71,9 @@ class WorkerAutomation(val unit: MapUnit) {
                         else{
                             val reachableTiles = roadableTiles.filter {  unit.canMoveTo(it)&& unit.movementAlgs().canReach(it)}
                             if(!reachableTiles.any()) continue
-                            tileToConstructRoadOn = roadableTiles.minBy { unit.movementAlgs().getShortestPath(it).size }!!
+                            tileToConstructRoadOn = reachableTiles.minBy { unit.movementAlgs().getShortestPath(it).size }!!
+                            unit.movementAlgs().headTowards(tileToConstructRoadOn)
                         }
-                        unit.movementAlgs().headTowards(tileToConstructRoadOn)
                         if(unit.currentMovement>0 && unit.currentTile==tileToConstructRoadOn
                                 && unit.currentTile.improvementInProgress!="Road")
                             tileToConstructRoadOn.startWorkingOnImprovement(GameBasics.TileImprovements["Road"]!!,unit.civInfo)