diff --git a/kanboard/Dockerfile b/kanboard/Dockerfile
index 624dd5f..fee17a8 100644
--- a/kanboard/Dockerfile
+++ b/kanboard/Dockerfile
@@ -11,7 +11,7 @@ RUN \
 
 RUN \
  # Install build dependencies
- apk --no-cache add --virtual .deps git unzip \
+ apk --no-cache add --virtual .deps git \
  # Download KanBoard
  && wget https://github.com/kanboard/kanboard/archive/v1.2.0.zip -O /srv/kanboard.zip \
  && unzip /srv/kanboard.zip -d /srv \