diff --git a/.gitmodules b/.gitmodules
index 39bd5688..bc131f93 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -27,4 +27,20 @@
 	url = https://github.com/lua/lua.git
 [submodule "deps/stb"]
 	path = deps/stb
-	url = https://github.com/nothings/stb.git
\ No newline at end of file
+	url = https://github.com/nothings/stb.git
+[submodule "deps/libtomcrypt"]
+	path = deps/libtomcrypt
+	url = https://github.com/libtom/libtomcrypt.git
+	branch = develop
+[submodule "deps/libtommath"]
+	path = deps/libtommath
+	url = https://github.com/libtom/libtommath.git
+	branch = develop
+[submodule "deps/protobuf"]
+	path = deps/protobuf
+	url = https://github.com/protocolbuffers/protobuf.git
+	branch = 3.17.x
+[submodule "deps/zlib"]
+	path = deps/zlib
+	url = https://github.com/madler/zlib.git
+	branch = develop
diff --git a/deps/libtomcrypt b/deps/libtomcrypt
new file mode 160000
index 00000000..06a81aeb
--- /dev/null
+++ b/deps/libtomcrypt
@@ -0,0 +1 @@
+Subproject commit 06a81aeb227424182125363f7554fad5146d6d2a
diff --git a/deps/libtommath b/deps/libtommath
new file mode 160000
index 00000000..66de8642
--- /dev/null
+++ b/deps/libtommath
@@ -0,0 +1 @@
+Subproject commit 66de86426e9cdb88526974c765108f01554af2b0
diff --git a/deps/protobuf b/deps/protobuf
new file mode 160000
index 00000000..5500c72c
--- /dev/null
+++ b/deps/protobuf
@@ -0,0 +1 @@
+Subproject commit 5500c72c5b616da9f0125bcfab513987a1226e2b
diff --git a/deps/zlib b/deps/zlib
new file mode 160000
index 00000000..2014a993
--- /dev/null
+++ b/deps/zlib
@@ -0,0 +1 @@
+Subproject commit 2014a993addbc8f1b9785d97f55fd189792c2f78