diff --git a/seafile-server/Dockerfile b/seafile-server/Dockerfile
index bed4cb3..ce50c93 100644
--- a/seafile-server/Dockerfile
+++ b/seafile-server/Dockerfile
@@ -15,6 +15,8 @@ RUN apt-get update && \
 DEBIAN_FRONTEND=noninteractive apt-get install -y \
 python3 \
 python3-pip \
+libldap2-dev \
+libsasl2-dev \
 && rm -rf /var/lib/apt/lists/*
 
 RUN pip3 install --target /pip-deps --timeout=3600 --no-cache-dir \