diff --git a/.gitmodules b/.gitmodules
index 8207b76..295f707 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -7,3 +7,6 @@
 [submodule "arduino/libraries/NTPClient"]
 	path = arduino/libraries/NTPClient
 	url = https://github.com/daniviga/NTPClient.git
+[submodule "arduino/libraries/pubsubclient"]
+	path = arduino/libraries/pubsubclient
+	url = https://github.com/knolleary/pubsubclient.git
diff --git a/arduino/libraries/pubsubclient b/arduino/libraries/pubsubclient
new file mode 160000
index 0000000..2d228f2
--- /dev/null
+++ b/arduino/libraries/pubsubclient
@@ -0,0 +1 @@
+Subproject commit 2d228f2f862a95846c65a8518c79f48dfc8f188c