diff --git a/Dockerfile.client b/Dockerfile.client
index f8f6b2c..45e21cd 100644
--- a/Dockerfile.client
+++ b/Dockerfile.client
@@ -1,6 +1,9 @@
-FROM golang as builder
+FROM golang:1.21.6-bookworm as builder
 WORKDIR /go/src/app
 
+RUN apt-get update && apt-get install -y \
+    unzip
+
 # caching rathole
 COPY scripts scripts
 RUN ./scripts/download-rathole.sh