diff --git a/README.md b/README.md
index 84d2835..cad2775 100644
--- a/README.md
+++ b/README.md
@@ -100,7 +100,7 @@ Options:
   -q, --quiet        Quiet mode (only outputs on error, success of new cert, or getssl was upgraded)
   -Q, --mute         Like -q, but mutes notification about successful upgrade
   -r, --revoke   "cert" "key" [CA_server] Revoke a certificate (the cert and key are required)
-  -u, --upgrade      Upgrade getssl if a more recent version is available
+  -u, --upgrade      Upgrade getssl if a more recent version is available - can be used with or without domain(s)
   -k, --keep     "#" Maximum amount of old getssl versions to keep when upgrading
   -U, --nocheck      Do not check if a more recent version is available
   -w working_dir "Working directory"
diff --git a/getssl b/getssl
index b14e465..f0e40ab 100755
--- a/getssl
+++ b/getssl
@@ -253,6 +253,7 @@
 # 2021-01-22 Add FTP_OPTIONS
 # 2021-01-27 Add the ability to set several reload commands (atisne)
 # 2021-01-29 Use dig -r (if supported) to ignore.digrc (#630)
+# 2021-02-07 Allow -u --upgrade without any domain, so that one can only update the script
 # ----------------------------------------------------------------------------------------
 
 case :$SHELLOPTS: in
@@ -261,7 +262,7 @@ esac
 
 PROGNAME=${0##*/}
 PROGDIR="$(cd "$(dirname "$0")" || exit; pwd -P;)"
-VERSION="2.33"
+VERSION="2.34"
 
 # defaults
 ACCOUNT_KEY_LENGTH=4096
@@ -1669,7 +1670,7 @@ help_message() { # print out the help message
 	  -q, --quiet        Quiet mode (only outputs on error, success of new cert, or getssl was upgraded)
 	  -Q, --mute         Like -q, but also mute notification about successful upgrade
 	  -r, --revoke   "cert" "key" [CA_server] Revoke a certificate (the cert and key are required)
-	  -u, --upgrade      Upgrade getssl if a more recent version is available
+	  -u, --upgrade      Upgrade getssl if a more recent version is available - can be used with or without domain(s)
 	  -k, --keep     "#" Maximum number of old getssl versions to keep when upgrading
 	  -U, --nocheck      Do not check if a more recent version is available
 	  -w working_dir "Working directory"
@@ -2513,6 +2514,11 @@ requires mktemp
 # Check if upgrades are available (unless they have specified -U to ignore Upgrade checks)
 if [[ $_UPGRADE_CHECK -eq 1 ]]; then
   check_getssl_upgrade
+  # if nothing in command line and no revocation and not only config check,
+  # then exit after upgrade
+  if [[ -z "$DOMAIN" ]] && [[ ${_CHECK_ALL} -ne 1 ]] && [[ ${_REVOKE} -ne 1 ]] && [ "${_ONLY_CHECK_CONFIG}" -ne 1 ]; then
+    graceful_exit
+  fi
 fi
 
 # Revoke a certificate if requested
diff --git a/test/32-test-upgrade.bats b/test/32-test-upgrade.bats
index 1c8af6d..baa7b0f 100644
--- a/test/32-test-upgrade.bats
+++ b/test/32-test-upgrade.bats
@@ -8,9 +8,15 @@ load '/getssl/test/test_helper.bash'
 # This is run for every test
 setup() {
     export CURL_CA_BUNDLE=/root/pebble-ca-bundle.crt
-    CURRENT_VERSION=$(awk -F '"' '$1 == "VERSION=" {print $2}' ${CODE_DIR}/getssl)
-    PREVIOUS_VERSION=$(echo ${CURRENT_VERSION} | awk -F. '{ print $1 "." $2-1}')
     run git clone https://github.com/srvrco/getssl.git "$INSTALL_DIR/upgrade-getssl"
+    # Don't do version arithmetics any longer, look what there really is
+    # by getting the last line (starting with v) and the one before of the
+    # list of tags.
+    cd "$INSTALL_DIR/upgrade-getssl"
+    # This sets CURRENT_VERSION and PREVIOUS_VERSION bash variables
+    eval $(git tag -l | awk 'BEGIN {cur="?.??"};/^v/{prv=cur;cur=substr($1,2)};END{ printf("CURRENT_VERSION=\"%s\";PREVIOUS_VERSION=\"%s\"\n",cur,prv)}')
+    # The version in the file, which we will overwrite
+    FILE_VERSION=$(awk -F'"' '/^VERSION=/{print $2}' "$CODE_DIR/getssl")
 }
 
 
@@ -31,6 +37,12 @@ teardown() {
     setup_environment
     init_getssl
     cp "${CODE_DIR}/test/test-config/${CONFIG_FILE}" "${INSTALL_DIR}/.getssl/${GETSSL_CMD_HOST}/getssl.cfg"
+    # Overwrite checked out getssl-script with copy of new one, 
+    # but write the previous version into the copy
+    # Note that this way we actually downgrade getssl, but we are testing
+    # the upgrading of the version in development
+    cp "$CODE_DIR/getssl" "$INSTALL_DIR/upgrade-getssl/"
+    sed -i -e "s/VERSION=\"${FILE_VERSION}\"/VERSION=\"${PREVIOUS_VERSION}\"/" "$INSTALL_DIR/upgrade-getssl/getssl" 
     run "$INSTALL_DIR/upgrade-getssl/getssl" --check-config ${GETSSL_CMD_HOST}
     assert_success
     #assert_line "Updated getssl from v${PREVIOUS_VERSION} to v${CURRENT_VERSION}"
@@ -45,12 +57,18 @@ teardown() {
     fi
 
     cd "$INSTALL_DIR/upgrade-getssl"
-    git checkout tags/v${PREVIOUS_VERSION}
+    git checkout tags/v${CURRENT_VERSION}
 
     CONFIG_FILE="getssl-http01.cfg"
     setup_environment
     init_getssl
     cp "${CODE_DIR}/test/test-config/${CONFIG_FILE}" "${INSTALL_DIR}/.getssl/${GETSSL_CMD_HOST}/getssl.cfg"
+    # Overwrite checked out getssl-script with copy of new one, 
+    # but write the previous version into the copy
+    # Note that this way we actually downgrade getssl, but we are testing
+    # the upgrading of the version in development
+    cp "$CODE_DIR/getssl" "$INSTALL_DIR/upgrade-getssl/"
+    sed -i -e "s/VERSION=\"${FILE_VERSION}\"/VERSION=\"${PREVIOUS_VERSION}\"/" "$INSTALL_DIR/upgrade-getssl/getssl" 
     run "$INSTALL_DIR/upgrade-getssl/getssl" --check-config --upgrade ${GETSSL_CMD_HOST}
     assert_success
     assert_line "Updated getssl from v${PREVIOUS_VERSION} to v${CURRENT_VERSION}"
@@ -71,6 +89,12 @@ teardown() {
     setup_environment
     init_getssl
     cp "${CODE_DIR}/test/test-config/${CONFIG_FILE}" "${INSTALL_DIR}/.getssl/${GETSSL_CMD_HOST}/getssl.cfg"
+    # Overwrite checked out getssl-script with copy of new one, 
+    # but write the previous version into the copy
+    # Note that this way we actually downgrade getssl, but we are testing
+    # the upgrading of the version in development
+    cp "$CODE_DIR/getssl" "$INSTALL_DIR/upgrade-getssl/"
+    sed -i -e "s/VERSION=\"${FILE_VERSION}\"/VERSION=\"${PREVIOUS_VERSION}\"/" "$INSTALL_DIR/upgrade-getssl/getssl" 
     run bash ./getssl --check-config --upgrade ${GETSSL_CMD_HOST}
     assert_success
     assert_line "Updated getssl from v${PREVIOUS_VERSION} to v${CURRENT_VERSION}"