diff --git a/.gitmodules b/.gitmodules
index 1a7f9623d..55c5ae9fe 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -26,10 +26,6 @@
 	path = extern/athena
 	url = ../../libAthena/athena.git
 	branch = master
-[submodule "extern/boo"]
-	path = extern/boo
-	url = ../boo.git
-	branch = master
 [submodule "extern/libjpeg-turbo"]
 	path = extern/libjpeg-turbo
 	url = ../libjpeg-turbo.git
diff --git a/extern/aurora b/extern/aurora
index 365cea46d..23b9ccb2c 160000
--- a/extern/aurora
+++ b/extern/aurora
@@ -1 +1 @@
-Subproject commit 365cea46dae3bc35070842580d565eeb2c39b1e5
+Subproject commit 23b9ccb2ccda123a19b060b73495b3ba4e55988f
diff --git a/extern/boo b/extern/boo
deleted file mode 160000
index 954a9bab5..000000000
--- a/extern/boo
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 954a9bab538769b2630b5705c7e4495753b1ad09