diff --git a/docker/Dockerfile b/docker/Dockerfile
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -21,7 +21,7 @@
     qtquickcontrols2-5-examples kirigami2-dev  # qml-module-qt-labs-platform
 
 RUN apt-get update && apt-get dist-upgrade -y && \
-  apt-get install -y --no-install-recommends qt5-default
+  apt-get install -y --no-install-recommends qt5-default ca-certificates
 
 # these are extra
 # RUN apt-get update && apt-get dist-upgrade -y && \