diff --git a/check_rc_upgrade.sh b/check_rc_upgrade.sh
index abe5c98..d8e7d97 100755
--- a/check_rc_upgrade.sh
+++ b/check_rc_upgrade.sh
@@ -11,7 +11,7 @@ CACHE_FAILED=$CACHE.failed
 MAX_CHECK=10
 MAX_FAILED=3
 SLEEP_ON_FAILED=10
-CHECK_URL=http://www.roundcube.net/download
+CHECK_URL=https://roundcube.net/download/
 DOWNLOAD=0
 DOWNLOAD_DIR=$RC_HOME/../upstream
 DONT_CHECK_SSL_CERT=0