diff --git a/.gitmodules b/.gitmodules
index 4099c0d7..feb3276a 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,7 +1,3 @@
-[submodule "customize"]
-path = packages/customize
-url = https://github.com/hydro-dev/customize.git
-
 [submodule "testlib"]
 path = packages/hydrojudge/vendor/testlib
 url = https://github.com/MikeMirzayanov/testlib.git
diff --git a/packages/customize b/packages/customize
deleted file mode 160000
index 2c77ba2f..00000000
--- a/packages/customize
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 2c77ba2f473b248eda91b2062819c68896343b05