diff --git a/Dockerfile b/Dockerfile
index 4fd65bb9769..ad070e7a04f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -21,7 +21,7 @@ FROM node:16.20.2-bullseye-slim AS runner
 WORKDIR /misskey
 
 RUN apt-get update \
- && apt-get install -y --no-install-recommends ffmpeg mecab mecab-ipadic-utf8 tini \
+ && apt-get install -y --no-install-recommends libjemalloc2 ffmpeg mecab mecab-ipadic-utf8 tini \
  && apt-get -y clean \
  && rm -rf /var/lib/apt/lists/* \
  && corepack enable pnpm
@@ -30,6 +30,7 @@ COPY --from=builder /misskey/node_modules ./node_modules
 COPY --from=builder /misskey/built ./built
 COPY . ./
 
+ENV LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libjemalloc.so.2
 ENV NODE_ENV=production
 ENTRYPOINT ["/usr/bin/tini", "--"]
 CMD ["pnpm", "start"]