diff --git a/.gitmodules b/.gitmodules
index b0d8e240..e69de29b 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +0,0 @@
-[submodule "open-x4-sdk"]
-	path = open-x4-sdk
-	url = https://github.com/open-x4-epaper/community-sdk.git
diff --git a/open-x4-sdk b/open-x4-sdk
deleted file mode 160000
index b502a268..00000000
--- a/open-x4-sdk
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit b502a268d65b1ab787e71826d8502126db71e6d4