diff --git a/changelog.txt b/changelog.txt
index 6abd6b1..e4e5ac4 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -1,3 +1,6 @@
+2022-01-20:  v1.2
+- Rare Bugs
+
 2022-01-08:  v1.1
 - Now possible: >Bulldoze< with collision
 - Street/Track Upgrades now can be conveniently done also outside the segment, after hovering
diff --git a/mod.lua b/mod.lua
index ac9f4b9..5e9a81f 100644
--- a/mod.lua
+++ b/mod.lua
@@ -4,7 +4,7 @@ function data()
 		info = {
 			name = "Build with Collision",
 			description = _("mod_desc"),
-			minorVersion = 1,
+			minorVersion = 2,
 			severityAdd = "NONE",
 			severityRemove = "NONE",
 			tags = {"Script Mod"},
diff --git a/res/config/game_script/build_with_collision.lua b/res/config/game_script/build_with_collision.lua
index 8f5f40e..f976d90 100644
--- a/res/config/game_script/build_with_collision.lua
+++ b/res/config/game_script/build_with_collision.lua
@@ -1,6 +1,7 @@
 local tb = require "bwc.toolbutton"
 local userdata2table = require"bwc.userdata2table"
 local copy_userdata = require"bwc.copy_userdata"
+require "serialize"
 
 local function proposalIsEmpty(proposal)
 	return