diff --git a/README.md b/README.md
index aea392b..171968e 100755
--- a/README.md
+++ b/README.md
@@ -61,6 +61,9 @@ Configure Options not in game menu:
 
 # Version History
 
+0.15.22 -  
+- Contribution - Martok88, Improvement: Added optional attack wave message per player  
+
 0.15.21 -  
 - Fixed: Added check for nil'ed itemCollection event (https://forums.factorio.com/viewtopic.php?f=94&t=31445&start=200#p302631)  
 - Fixed: Item Collector deconstruction not pulling items before destroying chest  
diff --git a/Upgrade.lua b/Upgrade.lua
index 6a7fcb2..1823243 100755
--- a/Upgrade.lua
+++ b/Upgrade.lua
@@ -170,10 +170,10 @@ function upgrade.attempt(natives, world)
 	game.surfaces[1].print("Rampant - Version 0.15.18")
 	global.version = constants.VERSION_28
     end
-    if (global.version < constants.VERSION_31) then
+    if (global.version < constants.VERSION_32) then
 
-	game.surfaces[1].print("Rampant - Version 0.15.21")
-	global.version = constants.VERSION_31
+	game.surfaces[1].print("Rampant - Version 0.15.22")
+	global.version = constants.VERSION_32
     end
     return starting ~= global.version, natives, world
 end
diff --git a/info.json b/info.json
index d292354..107f360 100755
--- a/info.json
+++ b/info.json
@@ -1,7 +1,7 @@
 {
     "name" : "Rampant",
     "factorio_version" : "0.15",
-    "version" : "0.15.21",
+    "version" : "0.15.22",
     "title" : "Rampant",
     "author" : "Veden",
     "homepage" : "https://forums.factorio.com/viewtopic.php?f=94&t=31445",
diff --git a/libs/Constants.lua b/libs/Constants.lua
index 1924575..3e86297 100755
--- a/libs/Constants.lua
+++ b/libs/Constants.lua
@@ -15,7 +15,7 @@ constants.VERSION_25 = 25
 constants.VERSION_26 = 26
 constants.VERSION_27 = 27
 constants.VERSION_28 = 28
-constants.VERSION_31 = 31
+constants.VERSION_32 = 32
 
 -- misc