diff --git a/.gitmodules b/.gitmodules
index a818ece..16c6307 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -8,3 +8,6 @@
 [submodule "d-test-utils"]
 	path = d-test-utils
 	url = https://github.com/dlang-community/d-test-utils.git
+[submodule "containers"]
+	path = containers
+	url = https://github.com/dlang-community/containers.git
diff --git a/containers b/containers
new file mode 160000
index 0000000..116a028
--- /dev/null
+++ b/containers
@@ -0,0 +1 @@
+Subproject commit 116a02872039efbd0289828cd5eeff6f60bdf539