diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..0bafc7c
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "ext/qoi"]
+	path = ext/qoi
+	url = https://github.com/phoboslab/qoi.git
diff --git a/ext/qoi b/ext/qoi
new file mode 160000
index 0000000..9497465
--- /dev/null
+++ b/ext/qoi
@@ -0,0 +1 @@
+Subproject commit 94974653c1929b0e12f388a4255c9dd2563eaa08