diff --git a/builder/image-software.sh b/builder/image-software.sh
index 079941e2..8b61bb66 100755
--- a/builder/image-software.sh
+++ b/builder/image-software.sh
@@ -138,6 +138,7 @@ echo_stamp "Install and enable Butterfly (web terminal)"
 echo_stamp "Workaround for tornado >= 6.0 breaking butterfly"
 export CRYPTOGRAPHY_DONT_BUILD_RUST=1
 my_travis_retry pip3 install cryptography==3.4.6 # https://stackoverflow.com/a/68472128/6850197
+my_travis_retry pip3 install pyOpenSSL==20.0.1
 my_travis_retry pip3 install tornado==5.1.1
 my_travis_retry pip3 install butterfly
 my_travis_retry pip3 install butterfly[systemd]