diff --git a/README.md b/README.md
index fb29684ae8..527a9f7320 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@ Gogs - Go Git Service [![Build Status](https://travis-ci.org/gogits/gogs.svg?bra
 
 ![](https://github.com/gogits/gogs/blob/master/public/img/gogs-large-resize.png?raw=true)
 
-##### Current tip version: 0.9.50 (see [Releases](https://github.com/gogits/gogs/releases) for binary versions)
+##### Current tip version: 0.9.51 (see [Releases](https://github.com/gogits/gogs/releases) for binary versions)
 
 | Web | UI  | Preview  |
 |:-------------:|:-------:|:-------:|
diff --git a/gogs.go b/gogs.go
index ba014f4170..d8da7069ea 100644
--- a/gogs.go
+++ b/gogs.go
@@ -17,7 +17,7 @@ import (
 	"github.com/gogits/gogs/modules/setting"
 )
 
-const APP_VER = "0.9.50.0723"
+const APP_VER = "0.9.51.0723"
 
 func init() {
 	runtime.GOMAXPROCS(runtime.NumCPU())
diff --git a/routers/repo/pull.go b/routers/repo/pull.go
index 56245a8766..2c534f1e03 100644
--- a/routers/repo/pull.go
+++ b/routers/repo/pull.go
@@ -235,6 +235,14 @@ func PrepareViewPullInfo(ctx *context.Context, pull *models.Issue) *git.PullRequ
 	prInfo, err := headGitRepo.GetPullRequestInfo(models.RepoPath(repo.Owner.Name, repo.Name),
 		pull.BaseBranch, pull.HeadBranch)
 	if err != nil {
+		if strings.Contains(err.Error(), "fatal: Not a valid object name") {
+			ctx.Data["IsPullReuqestBroken"] = true
+			ctx.Data["BaseTarget"] = "deleted"
+			ctx.Data["NumCommits"] = 0
+			ctx.Data["NumFiles"] = 0
+			return nil
+		}
+
 		ctx.Handle(500, "GetPullRequestInfo", err)
 		return nil
 	}
diff --git a/templates/.VERSION b/templates/.VERSION
index 8df80398e3..33af4b850c 100644
--- a/templates/.VERSION
+++ b/templates/.VERSION
@@ -1 +1 @@
-0.9.50.0723
\ No newline at end of file
+0.9.51.0723
\ No newline at end of file