diff --git a/Dockerfile.aarch64 b/Dockerfile.aarch64
index 9e2f346..95d96d3 100644
--- a/Dockerfile.aarch64
+++ b/Dockerfile.aarch64
@@ -4,6 +4,11 @@ FROM node:12-buster as wwwstage
 
 ARG KASMWEB_RELEASE="master"
 
+RUN \
+  echo "**** install build deps ****" && \
+  apt-get update && \
+  apt-get install -y phantomjs
+
 RUN \
   echo "**** build clientside ****" && \
   export QT_QPA_PLATFORM=offscreen && \