diff --git a/.gitmodules b/.gitmodules
index fc35c28..9e408a8 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -10,3 +10,15 @@
 [submodule "external/techreview-daniel"]
 	path = external/techreview-daniel
 	url = https://dev.danilafe.com/CS-46x/techreview
+[submodule "external/app"]
+	path = external/app
+	url = https://dev.danilafe.com/CS-46X/app.git
+[submodule "external/server"]
+	path = external/server
+	url = https://dev.danilafe.com/CS-46X/server.git
+[submodule "external/gateway"]
+	path = external/gateway
+	url = https://dev.danilafe.com/CS-46X/gateway.git
+[submodule "external/collar"]
+	path = external/collar
+	url = https://dev.danilafe.com/CS-46X/collar.git
diff --git a/external/app b/external/app
new file mode 160000
index 0000000..31885f5
--- /dev/null
+++ b/external/app
@@ -0,0 +1 @@
+Subproject commit 31885f5a739fab223cf1937f7f48b68fc66b8835
diff --git a/external/collar b/external/collar
new file mode 160000
index 0000000..d5c9e11
--- /dev/null
+++ b/external/collar
@@ -0,0 +1 @@
+Subproject commit d5c9e11e5f99d216608ba35f7b2005ae43af86d3
diff --git a/external/gateway b/external/gateway
new file mode 160000
index 0000000..d3aae73
--- /dev/null
+++ b/external/gateway
@@ -0,0 +1 @@
+Subproject commit d3aae7368c44116be5967f0f8a9d2a34175a4a7e
diff --git a/external/server b/external/server
new file mode 160000
index 0000000..6ec4a0c
--- /dev/null
+++ b/external/server
@@ -0,0 +1 @@
+Subproject commit 6ec4a0ccae232c5620d9e0f0fd7234a9dcb9b8e5