diff --git a/Dockerfile b/Dockerfile
index 64acc18..253c5e7 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -25,6 +25,7 @@ RUN \
     zlib-dev && \
   echo "**** install runtime packages ****" && \
   apk add --no-cache --upgrade \
+    libldap \
     postgresql-client \
     python3 \
     tiff \
diff --git a/Dockerfile.aarch64 b/Dockerfile.aarch64
index 4612ff9..9a212fd 100644
--- a/Dockerfile.aarch64
+++ b/Dockerfile.aarch64
@@ -25,6 +25,7 @@ RUN \
     zlib-dev && \
   echo "**** install runtime packages ****" && \
   apk add --no-cache --upgrade \
+    libldap \
     postgresql-client \
     python3 \
     tiff \