diff --git a/run.sh b/run.sh
index d5dced8..e59465c 100755
--- a/run.sh
+++ b/run.sh
@@ -2,6 +2,7 @@
 set -eux
 docker run -ti --rm -e DISPLAY \
   --cap-add=NET_ADMIN --device /dev/net/tun \
+  --shm-size 256M \
   -v /tmp/.X11-unix:/tmp/.X11-unix \
   -v `pwd`/openvpn:/etc/openvpn \
   -v `pwd`/shared:/home/user/Downloads \