diff --git a/Dockerfile b/Dockerfile
index 73c7255..a5fa95c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -12,6 +12,7 @@ RUN apk add --no-cache \
     openldap-overlay-refint \
     openldap-overlay-unique \
     openldap-overlay-ppolicy \
+    openldap-overlay-syncprov \
     openssl \
     argon2 \
     && mkdir -p /var/lib/openldap/openldap-data \