diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..c2ba7a4
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "gcklib"]
+	path = gcklib
+	url = https://github.com/gck-org/gcklib
diff --git a/gcklib b/gcklib
index 8cc0030..1f4c811 160000
--- a/gcklib
+++ b/gcklib
@@ -1 +1 @@
-Subproject commit 8cc003030ccb012df96cb16ed72f1ed4045b4b55
+Subproject commit 1f4c811bccf96df4c67d7636de68b3bb2cbc4b3f