diff --git a/OpenRA.Mods.Common/UtilityCommands/UpgradeRules.cs b/OpenRA.Mods.Common/UtilityCommands/UpgradeRules.cs
index 724fa95639..00b5a112f4 100644
--- a/OpenRA.Mods.Common/UtilityCommands/UpgradeRules.cs
+++ b/OpenRA.Mods.Common/UtilityCommands/UpgradeRules.cs
@@ -2158,6 +2158,19 @@ namespace OpenRA.Mods.Common.UtilityCommands
 					}
 				}
 
+				if (engineVersion < 20150926)
+				{
+					if (node.Key == "CrateSpawner")
+					{
+						var interval = node.Value.Nodes.FirstOrDefault(n => n.Key == "SpawnInterval");
+						if (interval != null)
+						{
+							var value = Exts.ParseIntegerInvariant(interval.Value.Value);
+							interval.Value.Value = (value * 25).ToString();
+						}
+					}
+				}
+
 				UpgradeActorRules(engineVersion, ref node.Value.Nodes, node, depth + 1);
 			}
 		}
diff --git a/mods/cnc/maps/the-hot-box/map.yaml b/mods/cnc/maps/the-hot-box/map.yaml
index dc2ce204f0..b20c52dcc4 100644
--- a/mods/cnc/maps/the-hot-box/map.yaml
+++ b/mods/cnc/maps/the-hot-box/map.yaml
@@ -213,7 +213,7 @@ Rules:
 	World:
 		CrateSpawner:
 			Maximum: 4
-			SpawnInterval: 5
+			SpawnInterval: 125
 			CrateActors: unitcrate
 			InitialSpawnDelay: 0
 		-SpawnMPUnits:
diff --git a/mods/cnc/rules/world.yaml b/mods/cnc/rules/world.yaml
index f9a8019633..f8832d807a 100644
--- a/mods/cnc/rules/world.yaml
+++ b/mods/cnc/rules/world.yaml
@@ -139,7 +139,7 @@ World:
 	CrateSpawner:
 		Minimum: 1
 		Maximum: 6
-		SpawnInterval: 120
+		SpawnInterval: 3000
 		WaterChance: 0
 	PathFinder:
 	ValidateOrder:
diff --git a/mods/d2k/rules/world.yaml b/mods/d2k/rules/world.yaml
index c8ac3b0a0b..35c448c614 100644
--- a/mods/d2k/rules/world.yaml
+++ b/mods/d2k/rules/world.yaml
@@ -62,7 +62,7 @@ World:
 	CrateSpawner:
 		Minimum: 0
 		Maximum: 2
-		SpawnInterval: 60
+		SpawnInterval: 1500
 		WaterChance: 0
 		ValidGround: Sand, Dune, Rock
 	DomainIndex:
diff --git a/mods/ra/maps/drop-zone-battle-of-tikiaki/map.yaml b/mods/ra/maps/drop-zone-battle-of-tikiaki/map.yaml
index e4beae812f..eb59e24aa5 100644
--- a/mods/ra/maps/drop-zone-battle-of-tikiaki/map.yaml
+++ b/mods/ra/maps/drop-zone-battle-of-tikiaki/map.yaml
@@ -294,7 +294,7 @@ Rules:
 	World:
 		CrateSpawner:
 			Maximum: 3
-			SpawnInterval: 5
+			SpawnInterval: 125
 			CrateActors: unitcrate
 			InitialSpawnDelay: 0
 		-SpawnMPUnits:
diff --git a/mods/ra/maps/drop-zone-w/map.yaml b/mods/ra/maps/drop-zone-w/map.yaml
index 6bc46f5b68..2f0de1c019 100644
--- a/mods/ra/maps/drop-zone-w/map.yaml
+++ b/mods/ra/maps/drop-zone-w/map.yaml
@@ -199,7 +199,7 @@ Rules:
 	World:
 		CrateSpawner:
 			Maximum: 3
-			SpawnInterval: 5
+			SpawnInterval: 125
 			WaterChance: 1
 			CrateActors: unitcrate
 			InitialSpawnDelay: 0
diff --git a/mods/ra/maps/drop-zone/map.yaml b/mods/ra/maps/drop-zone/map.yaml
index 70464b0e7b..4bbbdd1734 100644
--- a/mods/ra/maps/drop-zone/map.yaml
+++ b/mods/ra/maps/drop-zone/map.yaml
@@ -189,7 +189,7 @@ Rules:
 	World:
 		CrateSpawner:
 			Maximum: 3
-			SpawnInterval: 5
+			SpawnInterval: 125
 			CrateActors: unitcrate
 			InitialSpawnDelay: 0
 		-SpawnMPUnits:
diff --git a/mods/ra/maps/fort-lonestar/map.yaml b/mods/ra/maps/fort-lonestar/map.yaml
index 9566e7e263..5220ceee8c 100644
--- a/mods/ra/maps/fort-lonestar/map.yaml
+++ b/mods/ra/maps/fort-lonestar/map.yaml
@@ -497,7 +497,7 @@ Rules:
 	World:
 		CrateSpawner:
 			Maximum: 1
-			SpawnInterval: 100
+			SpawnInterval: 2500
 			CrateActors: fortcrate
 		-SpawnMPUnits:
 		-MPStartLocations:
diff --git a/mods/ra/rules/world.yaml b/mods/ra/rules/world.yaml
index a899109488..49e8a63df1 100644
--- a/mods/ra/rules/world.yaml
+++ b/mods/ra/rules/world.yaml
@@ -105,7 +105,7 @@ World:
 		QuantizedFacings: 16
 		Minimum: 1
 		Maximum: 3
-		SpawnInterval: 120
+		SpawnInterval: 3000
 		WaterChance: .2
 	DomainIndex:
 	SmudgeLayer@SCORCH:
diff --git a/mods/ts/rules/world.yaml b/mods/ts/rules/world.yaml
index 9a2dd718ed..07a385eaa9 100644
--- a/mods/ts/rules/world.yaml
+++ b/mods/ts/rules/world.yaml
@@ -157,7 +157,7 @@ World:
 	CrateSpawner:
 		Minimum: 1
 		Maximum: 6
-		SpawnInterval: 120
+		SpawnInterval: 3000
 		WaterChance: 0
 		ValidGround: Clear, Rough, Road, DirtRoad, Tiberium, BlueTiberium
 	PathFinder: