diff --git a/controllers/account.go b/controllers/account.go
index 1e2f2b6c..664ee8ee 100644
--- a/controllers/account.go
+++ b/controllers/account.go
@@ -140,13 +140,6 @@ func (c *ApiController) Signup() {
 		username = id
 	}
 
-	password := authForm.Password
-	msg = object.CheckPasswordComplexityByOrg(organization, password)
-	if msg != "" {
-		c.ResponseError(msg)
-		return
-	}
-
 	initScore, err := organization.GetInitScore()
 	if err != nil {
 		c.ResponseError(fmt.Errorf(c.T("account:Get init score failed, error: %w"), err).Error())
diff --git a/object/check.go b/object/check.go
index dd1e92fc..7f0faff8 100644
--- a/object/check.go
+++ b/object/check.go
@@ -66,8 +66,11 @@ func CheckUserSignup(application *Application, organization *Organization, form
 		}
 	}
 
-	if len(form.Password) <= 5 {
-		return i18n.Translate(lang, "check:Password must have at least 6 characters")
+	if application.IsSignupItemVisible("Password") {
+		msg := CheckPasswordComplexityByOrg(organization, form.Password)
+		if msg != "" {
+			return msg
+		}
 	}
 
 	if application.IsSignupItemVisible("Email") {
@@ -126,7 +129,9 @@ func CheckUserSignup(application *Application, organization *Organization, form
 
 	if len(application.InvitationCodes) > 0 {
 		if form.InvitationCode == "" {
-			return i18n.Translate(lang, "check:Invitation code cannot be blank")
+			if application.IsSignupItemRequired("Invitation code") {
+				return i18n.Translate(lang, "check:Invitation code cannot be blank")
+			}
 		} else {
 			if !util.InSlice(application.InvitationCodes, form.InvitationCode) {
 				return i18n.Translate(lang, "check:Invitation code is invalid")
diff --git a/web/src/table/SignupTable.js b/web/src/table/SignupTable.js
index e58551fb..5df9b5f5 100644
--- a/web/src/table/SignupTable.js
+++ b/web/src/table/SignupTable.js
@@ -137,7 +137,7 @@ class SignupTable extends React.Component {
           }
 
           return (
-            <Switch checked={text} onChange={checked => {
+            <Switch checked={text} disabled={record.name === "Password"} onChange={checked => {
               this.updateField(table, index, "required", checked);
             }} />
           );