diff --git a/.gitmodules b/.gitmodules
index 154c825..b96de8b 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -8,3 +8,7 @@
 [submodule "esptool"]
 	path = esptool
 	url = https://github.com/pfalcon/esptool
+[submodule "esp-open-lwip"]
+	path = esp-open-lwip
+	url = https://github.com/pfalcon/esp-open-lwip
+	branch = sdk-1.5.0
diff --git a/esp-open-lwip b/esp-open-lwip
new file mode 160000
index 0000000..5bd20af
--- /dev/null
+++ b/esp-open-lwip
@@ -0,0 +1 @@
+Subproject commit 5bd20afa6869b682001250e2a95c261390f1098d