diff --git a/routers/api/v1/repo/issue.go b/routers/api/v1/repo/issue.go
index 1169ceaf6..df4bdf624 100644
--- a/routers/api/v1/repo/issue.go
+++ b/routers/api/v1/repo/issue.go
@@ -14,6 +14,7 @@ import (
 	"code.gitea.io/gitea/modules/context"
 	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/modules/util"
+	"net/http"
 )
 
 // ListIssues list the issues of a repository
@@ -174,7 +175,7 @@ func CreateIssue(ctx *context.APIContext, form api.CreateIssueOption) {
 	if form.Closed {
 		if err := issue.ChangeStatus(ctx.User, ctx.Repo.Repository, true); err != nil {
 			if models.IsErrDependenciesLeft(err) {
-				ctx.Error(409, "", fmt.Sprintf("cannot close this issue because it still has open dependencies"))
+				ctx.Error(http.StatusPreconditionFailed, "", fmt.Sprintf("cannot close this issue because it still has open dependencies"))
 				return
 			}
 			ctx.Error(500, "ChangeStatus", err)
@@ -285,7 +286,7 @@ func EditIssue(ctx *context.APIContext, form api.EditIssueOption) {
 	if form.State != nil {
 		if err = issue.ChangeStatus(ctx.User, ctx.Repo.Repository, api.StateClosed == api.StateType(*form.State)); err != nil {
 			if models.IsErrDependenciesLeft(err) {
-				ctx.Error(409, "", fmt.Sprintf("cannot close this issue because it still has open dependencies"))
+				ctx.Error(http.StatusPreconditionFailed, "", fmt.Sprintf("cannot close this issue because it still has open dependencies"))
 				return
 			}
 			ctx.Error(500, "ChangeStatus", err)
diff --git a/routers/api/v1/repo/pull.go b/routers/api/v1/repo/pull.go
index 0823edbd5..ef7edb737 100644
--- a/routers/api/v1/repo/pull.go
+++ b/routers/api/v1/repo/pull.go
@@ -15,6 +15,7 @@ import (
 	"code.gitea.io/gitea/modules/log"
 
 	api "code.gitea.io/sdk/gitea"
+	"net/http"
 )
 
 // ListPullRequests returns a list of all PRs
@@ -367,7 +368,7 @@ func EditPullRequest(ctx *context.APIContext, form api.EditPullRequestOption) {
 	if form.State != nil {
 		if err = issue.ChangeStatus(ctx.User, ctx.Repo.Repository, api.StateClosed == api.StateType(*form.State)); err != nil {
 			if models.IsErrDependenciesLeft(err) {
-				ctx.Error(409, "", fmt.Sprintf("cannot close this pull request because it still has open dependencies"))
+				ctx.Error(http.StatusPreconditionFailed, "", fmt.Sprintf("cannot close this pull request because it still has open dependencies"))
 				return
 			}
 			ctx.Error(500, "ChangeStatus", err)
diff --git a/routers/repo/issue.go b/routers/repo/issue.go
index a2d8b8805..7efdb96cc 100644
--- a/routers/repo/issue.go
+++ b/routers/repo/issue.go
@@ -28,6 +28,7 @@ import (
 	"code.gitea.io/gitea/modules/notification"
 	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/modules/util"
+	"net/http"
 )
 
 const (
@@ -956,7 +957,7 @@ func UpdateIssueStatus(ctx *context.Context) {
 	for _, issue := range issues {
 		if err := issue.ChangeStatus(ctx.User, issue.Repo, isClosed); err != nil {
 			if models.IsErrDependenciesLeft(err) {
-				ctx.Error(409, "", fmt.Sprintf("cannot close this issue because it still has open dependencies"))
+				ctx.Error(http.StatusPreconditionFailed, "", fmt.Sprintf("cannot close this issue because it still has open dependencies"))
 				return
 			}
 			ctx.ServerError("ChangeStatus", err)
@@ -1026,10 +1027,10 @@ func NewComment(ctx *context.Context, form auth.CreateCommentForm) {
 					if models.IsErrDependenciesLeft(err) {
 						if issue.IsPull {
 							ctx.Flash.Error(ctx.Tr("repo.issues.dependency.pr_close_blocked"))
-							ctx.Redirect(fmt.Sprintf("%s/pulls/%d", ctx.Repo.RepoLink, issue.Index))
+							ctx.Redirect(fmt.Sprintf("%s/pulls/%d", ctx.Repo.RepoLink, issue.Index), http.StatusTemporaryRedirect)
 						} else {
 							ctx.Flash.Error(ctx.Tr("repo.issues.dependency.issue_close_blocked"))
-							ctx.Redirect(fmt.Sprintf("%s/issues/%d", ctx.Repo.RepoLink, issue.Index))
+							ctx.Redirect(fmt.Sprintf("%s/issues/%d", ctx.Repo.RepoLink, issue.Index), http.StatusTemporaryRedirect)
 						}
 					}
 				} else {