diff --git a/.gitmodules b/.gitmodules
index 9967526..0f1122c 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -48,3 +48,6 @@
 [submodule "vendor/semver"]
 	path = vendor/semver
 	url = https://github.com/h2non/semver.c.git
+[submodule "vendor/TinySHA1"]
+	path = vendor/TinySHA1
+	url = https://github.com/mohaps/TinySHA1.git
diff --git a/vendor/TinySHA1 b/vendor/TinySHA1
new file mode 160000
index 0000000..2795aa8
--- /dev/null
+++ b/vendor/TinySHA1
@@ -0,0 +1 @@
+Subproject commit 2795aa8de91b1797defdfbff61ed93b22b5ced81