diff --git a/src/ViewModels/CreateBranch.cs b/src/ViewModels/CreateBranch.cs
index 5e97cc86..bc42ee9e 100644
--- a/src/ViewModels/CreateBranch.cs
+++ b/src/ViewModels/CreateBranch.cs
@@ -6,7 +6,7 @@ namespace SourceGit.ViewModels
     public class CreateBranch : Popup
     {
         [Required(ErrorMessage = "Branch name is required!")]
-        [RegularExpression(@"^[\w\-/\.]+$", ErrorMessage = "Bad branch name format!")]
+        [RegularExpression(@"^[\w\-/\.#]+$", ErrorMessage = "Bad branch name format!")]
         [CustomValidation(typeof(CreateBranch), nameof(ValidateBranchName))]
         public string Name
         {
diff --git a/src/ViewModels/GitFlowStart.cs b/src/ViewModels/GitFlowStart.cs
index af1b8875..ec1343d4 100644
--- a/src/ViewModels/GitFlowStart.cs
+++ b/src/ViewModels/GitFlowStart.cs
@@ -6,7 +6,7 @@ namespace SourceGit.ViewModels
     public class GitFlowStart : Popup
     {
         [Required(ErrorMessage = "Name is required!!!")]
-        [RegularExpression(@"^[\w\-/\.]+$", ErrorMessage = "Bad branch name format!")]
+        [RegularExpression(@"^[\w\-/\.#]+$", ErrorMessage = "Bad branch name format!")]
         [CustomValidation(typeof(GitFlowStart), nameof(ValidateBranchName))]
         public string Name
         {
diff --git a/src/ViewModels/RenameBranch.cs b/src/ViewModels/RenameBranch.cs
index 13428288..acd38ced 100644
--- a/src/ViewModels/RenameBranch.cs
+++ b/src/ViewModels/RenameBranch.cs
@@ -12,7 +12,7 @@ namespace SourceGit.ViewModels
         }
 
         [Required(ErrorMessage = "Branch name is required!!!")]
-        [RegularExpression(@"^[\w\-/\.]+$", ErrorMessage = "Bad branch name format!")]
+        [RegularExpression(@"^[\w\-/\.#]+$", ErrorMessage = "Bad branch name format!")]
         [CustomValidation(typeof(RenameBranch), nameof(ValidateBranchName))]
         public string Name
         {