diff --git a/setup/management.sh b/setup/management.sh
index 67a6204a..f07d862d 100755
--- a/setup/management.sh
+++ b/setup/management.sh
@@ -3,7 +3,7 @@
 source setup/functions.sh
 
 apt_install python3-flask links duplicity libyaml-dev python3-dnspython python3-dateutil
-hide_output pip3 install rtyaml "email_validator==0.1.0-rc4"
+hide_output pip3 install rtyaml "email_validator==0.1.0-rc5"
 	# email_validator is repeated in setup/questions.sh
 
 # Create a backup directory and a random key for encrypting backups.
diff --git a/setup/questions.sh b/setup/questions.sh
index 540e125c..cf20db71 100644
--- a/setup/questions.sh
+++ b/setup/questions.sh
@@ -10,7 +10,7 @@ if [ -z "$NONINTERACTIVE" ]; then
 	apt_get_quiet install dialog python3 python3-pip  || exit 1
 
 	# email_validator is repeated in setup/management.sh
-	hide_output pip3 install "email_validator==0.1.0-rc4" || exit 1
+	hide_output pip3 install "email_validator==0.1.0-rc5" || exit 1
 
 	message_box "Mail-in-a-Box Installation" \
 		"Hello and thanks for deploying a Mail-in-a-Box!