diff --git a/Dockerfile b/Dockerfile
index da418d0..0a5b997 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -8,6 +8,10 @@ RUN apk add --no-cache \
   openconnect \
   xmlstarlet
 
+RUN set -x \
+  && wget -O/usr/libexec/openconnect/csd-post.sh https://gitlab.com/openconnect/openconnect/-/raw/master/trojans/csd-post.sh \
+  && chmod +x /usr/libexec/openconnect/csd-post.sh
+
 WORKDIR /vpn
 COPY ./entrypoint.sh .