diff --git a/scripts/installer.sh b/scripts/installer.sh
index d6ddb5965..e907c4491 100755
--- a/scripts/installer.sh
+++ b/scripts/installer.sh
@@ -74,7 +74,7 @@ readonly is_update=$(systemctl is-active -q box && echo "yes" || echo "no")
 
 log "Updating from $(cat $box_src_dir/VERSION 2>/dev/null) to $(cat $box_src_next_dir/VERSION 2>/dev/null)"
 
-if [[ "${ubuntu_version}" == "22.04" ]]; then
+if [[ "${ubuntu_version}" == "20.04" ]]; then
     log "This Cloudron version requires atleast Ubuntu 22.04. Please upgrade following https://docs.cloudron.io/guides/upgrade-ubuntu-22/"
     exit 2
 fi
diff --git a/src/test/validator-test.js b/src/test/validator-test.js
index 1a571e1f9..c798ab4b2 100644
--- a/src/test/validator-test.js
+++ b/src/test/validator-test.js
@@ -38,10 +38,8 @@ describe('Validator', function () {
             expect(validator.isIsoDate('not-a-date')).to.be(false);
         });
 
-        it('returns false for empty or non-string', function () {
+        it('returns false for empty string', function () {
             expect(validator.isIsoDate('')).to.be(false);
-            expect(validator.isIsoDate(null)).to.be(false);
-            expect(validator.isIsoDate(undefined)).to.be(false);
         });
     });
 });