diff --git a/.gitignore b/.gitignore
index 6cd8d74..4fe6bd7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,6 +6,7 @@
 
 # unhide dotfiles we want to keep
 !.gitignore
+!.gitmodules
 !.editorconfig
 !.clang-format
 !/.github/
diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..bf6b40f
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,6 @@
+[submodule "lib/glfw"]
+	path = lib/glfw
+	url = https://github.com/glfw/glfw.git
+[submodule "lib/libarchive"]
+	path = lib/libarchive
+	url = https://github.com/libarchive/libarchive.git
diff --git a/lib/glfw b/lib/glfw
new file mode 160000
index 0000000..7b6aead
--- /dev/null
+++ b/lib/glfw
@@ -0,0 +1 @@
+Subproject commit 7b6aead9fb88b3623e3b3725ebb42670cbe4c579
diff --git a/lib/libarchive b/lib/libarchive
new file mode 160000
index 0000000..9525f90
--- /dev/null
+++ b/lib/libarchive
@@ -0,0 +1 @@
+Subproject commit 9525f90ca4bd14c7b335e2f8c84a4607b0af6bdf