diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..1e3f127
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,6 @@
+[submodule "3rdparty/cmark-gfm"]
+	path = 3rdparty/cmark-gfm
+	url = https://github.com/github/cmark-gfm.git
+[submodule "3rdparty/md4qt"]
+	path = 3rdparty/md4qt
+	url = https://github.com/igormironchik/md4qt.git
diff --git a/3rdparty/cmark-gfm b/3rdparty/cmark-gfm
new file mode 160000
index 0000000..587a12b
--- /dev/null
+++ b/3rdparty/cmark-gfm
@@ -0,0 +1 @@
+Subproject commit 587a12bb54d95ac37241377e6ddc93ea0e45439b
diff --git a/3rdparty/md4qt b/3rdparty/md4qt
index 6005c68..ef2c5e7 160000
--- a/3rdparty/md4qt
+++ b/3rdparty/md4qt
@@ -1 +1 @@
-Subproject commit 6005c681d574028d0208b500c694e6994b5f419e
+Subproject commit ef2c5e745c66c3e1b2b170a4f33de4891e1a5a7a