diff --git a/build/Dockerfile-gui b/build/Dockerfile-gui
index a0dc626..857c08e 100644
--- a/build/Dockerfile-gui
+++ b/build/Dockerfile-gui
@@ -4,6 +4,7 @@ RUN apt-get update && \
     apt-get install -y --no-install-recommends \
         ca-certificates \
         tzdata \
+        zip \
     && rm -rf /var/lib/apt/lists/*
 
 COPY tmp/labca-gui /opt/labca/bin/