diff --git a/.gitmodules b/.gitmodules
index 73b2db24..30415891 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -226,3 +226,6 @@
 [submodule "libraries/drivers/am2320"]
 	path = libraries/drivers/am2320
 	url = https://github.com/adafruit/Adafruit_CircuitPython_AM2320.git
+[submodule "libraries/drivers/mcp230xx"]
+	path = libraries/drivers/mcp230xx
+	url = https://github.com/adafruit/Adafruit_CircuitPython_MCP230xx
diff --git a/libraries/drivers/mcp230xx b/libraries/drivers/mcp230xx
new file mode 160000
index 00000000..60e243e6
--- /dev/null
+++ b/libraries/drivers/mcp230xx
@@ -0,0 +1 @@
+Subproject commit 60e243e60cd7fa770e600f6d2bad1ef55e9474ef