diff --git a/.gitmodules b/.gitmodules
index fbe168edb7..cd4c53c00f 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,4 +1,4 @@
 [submodule "engine"]
 	path = engine
 	url = https://github.com/space-wizards/space-station-14.git
-	branch = 3ccb252a968e1ded9310bdf9c1805d3364b81adb
\ No newline at end of file
+	branch = 0a231f0217a7b9f9ce7093bdd091ce3e3de1b69d
\ No newline at end of file
diff --git a/Content.Client/Prototypes/DiscoBall.cs b/Content.Client/Prototypes/DiscoBall.cs
index 0916851a87..b184437c3f 100644
--- a/Content.Client/Prototypes/DiscoBall.cs
+++ b/Content.Client/Prototypes/DiscoBall.cs
@@ -1,7 +1,6 @@
-using OpenTK;
-using OpenTK.Graphics;
-using SS14.Client.GameObjects;
+using SS14.Client.GameObjects;
 using SS14.Shared.GameObjects;
+using SS14.Shared.Maths;
 
 namespace Content.Client.Prototypes
 {
diff --git a/engine b/engine
index 1487b2cdad..0a231f0217 160000
--- a/engine
+++ b/engine
@@ -1 +1 @@
-Subproject commit 1487b2cdadd9a3094ca30a21beb0f8db069a3f1c
+Subproject commit 0a231f0217a7b9f9ce7093bdd091ce3e3de1b69d