diff --git a/src/CodingWithCalvin.ProjectRenamifier/Commands/RenamifyProjectCommand.cs b/src/CodingWithCalvin.ProjectRenamifier/Commands/RenamifyProjectCommand.cs
index 72a7c42..094bda0 100644
--- a/src/CodingWithCalvin.ProjectRenamifier/Commands/RenamifyProjectCommand.cs
+++ b/src/CodingWithCalvin.ProjectRenamifier/Commands/RenamifyProjectCommand.cs
@@ -215,32 +215,38 @@ private void RenameProject(Project project, DTE2 dte)
                     return ProjectFileService.RenameProjectFile(projectFilePath, newName);
                 }, out projectFilePath);
 
-                // Step 7: Rename parent directory if it matches the old project name
+                // Step 7: Rename sibling files (e.g., .csproj.user, .vcxproj.filters)
+                ExecuteStep(progressDialog, stepIndex++, () =>
+                {
+                    ProjectFileService.RenameSiblingFiles(projectFilePath, currentName);
+                });
+
+                // Step 8: Rename parent directory if it matches the old project name
                 ExecuteStep(progressDialog, stepIndex++, () =>
                 {
                     return ProjectFileService.RenameParentDirectoryIfMatches(projectFilePath, currentName, newName);
                 }, out projectFilePath);
 
-                // Step 8: Update references in projects that referenced this project
+                // Step 9: Update references in projects that referenced this project
                 ExecuteStep(progressDialog, stepIndex++, () =>
                 {
                     ProjectReferenceService.UpdateProjectReferences(referencingProjects, oldProjectFilePath, projectFilePath);
                 });
 
-                // Step 9: Re-add project to solution, preserving solution folder location
+                // Step 10: Re-add project to solution, preserving solution folder location
                 ExecuteStep(progressDialog, stepIndex++, () =>
                 {
                     SolutionFolderService.AddProjectToSolution(dte.Solution, projectFilePath, parentSolutionFolder);
                     projectReaddedToSolution = true;
                 });
 
-                // Step 10: Update using statements across the entire solution
+                // Step 11: Update using statements across the entire solution
                 ExecuteStep(progressDialog, stepIndex++, () =>
                 {
                     SourceFileService.UpdateUsingStatementsInSolution(dte.Solution, currentName, newName);
                 });
 
-                // Step 11: Update fully qualified type references across the solution
+                // Step 12: Update fully qualified type references across the solution
                 ExecuteStep(progressDialog, stepIndex++, () =>
                 {
                     SourceFileService.UpdateFullyQualifiedReferencesInSolution(dte.Solution, currentName, newName);
diff --git a/src/CodingWithCalvin.ProjectRenamifier/Dialogs/RenameProgressDialog.xaml b/src/CodingWithCalvin.ProjectRenamifier/Dialogs/RenameProgressDialog.xaml
index cfffd5b..f6eb84c 100644
--- a/src/CodingWithCalvin.ProjectRenamifier/Dialogs/RenameProgressDialog.xaml
+++ b/src/CodingWithCalvin.ProjectRenamifier/Dialogs/RenameProgressDialog.xaml
@@ -3,7 +3,7 @@
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         Title="Renaming Project"
         Width="400"
-        Height="360"
+        Height="384"
         ResizeMode="NoResize"
         WindowStartupLocation="CenterOwner"
         ShowInTaskbar="False">
diff --git a/src/CodingWithCalvin.ProjectRenamifier/Dialogs/RenameProgressDialog.xaml.cs b/src/CodingWithCalvin.ProjectRenamifier/Dialogs/RenameProgressDialog.xaml.cs
index e0e561a..6145a8a 100644
--- a/src/CodingWithCalvin.ProjectRenamifier/Dialogs/RenameProgressDialog.xaml.cs
+++ b/src/CodingWithCalvin.ProjectRenamifier/Dialogs/RenameProgressDialog.xaml.cs
@@ -23,6 +23,7 @@ public RenameProgressDialog(string projectName)
                 new ProgressStep("Updating project file"),
                 new ProgressStep("Updating namespace declarations"),
                 new ProgressStep("Renaming project file"),
+                new ProgressStep("Renaming sibling files"),
                 new ProgressStep("Renaming project directory"),
                 new ProgressStep("Updating project references"),
                 new ProgressStep("Re-adding project to solution"),
diff --git a/src/CodingWithCalvin.ProjectRenamifier/Services/ProjectFileService.cs b/src/CodingWithCalvin.ProjectRenamifier/Services/ProjectFileService.cs
index f430fdf..0e9c787 100644
--- a/src/CodingWithCalvin.ProjectRenamifier/Services/ProjectFileService.cs
+++ b/src/CodingWithCalvin.ProjectRenamifier/Services/ProjectFileService.cs
@@ -1,4 +1,6 @@
+using System.Collections.Generic;
 using System.IO;
+using System.Linq;
 using System.Xml;
 
 namespace CodingWithCalvin.ProjectRenamifier.Services
@@ -26,6 +28,45 @@ public static string RenameProjectFile(string projectFilePath, string newName)
             return newFilePath;
         }
 
+        /// <summary>
+        /// Renames sibling files that share the project file name as a prefix.
+        /// For example, renaming Foo.csproj also renames Foo.csproj.user, Foo.csproj.filters, etc.
+        /// </summary>
+        /// <param name="projectFilePath">Full path to the already-renamed project file.</param>
+        /// <param name="oldName">The old project name (without extension).</param>
+        /// <returns>A list of the old file paths that were renamed.</returns>
+        public static IReadOnlyList<string> RenameSiblingFiles(string projectFilePath, string oldName)
+        {
+            var directory = Path.GetDirectoryName(projectFilePath);
+            var extension = Path.GetExtension(projectFilePath);
+            var newName = Path.GetFileNameWithoutExtension(projectFilePath);
+            var oldProjectFileName = oldName + extension;
+            var newProjectFileName = newName + extension;
+
+            var siblingFiles = Directory.GetFiles(directory)
+                .Where(f =>
+                {
+                    var fileName = Path.GetFileName(f);
+                    return fileName.StartsWith(oldProjectFileName + ".", StringComparison.OrdinalIgnoreCase);
+                })
+                .ToList();
+
+            var renamed = new List<string>();
+
+            foreach (var filePath in siblingFiles)
+            {
+                var fileName = Path.GetFileName(filePath);
+                var suffix = fileName.Substring(oldProjectFileName.Length);
+                var newFileName = newProjectFileName + suffix;
+                var newFilePath = Path.Combine(directory, newFileName);
+
+                File.Move(filePath, newFilePath);
+                renamed.Add(filePath);
+            }
+
+            return renamed;
+        }
+
         /// <summary>
         /// Renames the parent directory if its name matches the old project name.
         /// </summary>