diff --git a/.gitmodules b/.gitmodules
deleted file mode 100644
index 9246e09b8bd4..000000000000
--- a/.gitmodules
+++ /dev/null
@@ -1,3 +0,0 @@
-[submodule "misskey-assets"]
-	path = misskey-assets
-	url = https://github.com/misskey-dev/assets.git
diff --git a/Dockerfile b/Dockerfile
index ff60b92efa99..0bc25aef5a1e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,8 +6,6 @@ WORKDIR /misskey
 RUN apt-get update \
  && apt-get install -y --no-install-recommends build-essential
 
-RUN git init
-RUN git submodule update --init
 COPY package.json yarn.lock ./
 RUN yarn install
 COPY . ./