diff --git a/Dockerfile.proxy_only b/Dockerfile.proxy_only
index bc4cc90b..7c0f2972 100644
--- a/Dockerfile.proxy_only
+++ b/Dockerfile.proxy_only
@@ -13,6 +13,7 @@ WORKDIR /app
 RUN apt-get update && apt-get install -y --no-install-recommends \
   build-essential \
   python3-dev \
+  python3-blis \
   gcc \
   g++ \
   && rm -rf /var/lib/apt/lists/*