diff --git a/.gitmodules b/.gitmodules
index 5a4e85a..2b43c04 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,6 @@
 [submodule "third_party/googletest"]
 	path = third_party/googletest
 	url = https://github.com/google/googletest.git
+[submodule "third_party/md5"]
+	path = third_party/md5
+	url = https://github.com/ulwanski/md5.git
diff --git a/third_party/md5 b/third_party/md5
new file mode 160000
index 0000000..2857560
--- /dev/null
+++ b/third_party/md5
@@ -0,0 +1 @@
+Subproject commit 2857560d6466c7b1a89da93a075ebadf6991783e