diff --git a/Bloxstrap/Bootstrapper.cs b/Bloxstrap/Bootstrapper.cs
index fddaf84..02c7937 100644
--- a/Bloxstrap/Bootstrapper.cs
+++ b/Bloxstrap/Bootstrapper.cs
@@ -461,6 +461,14 @@ namespace Bloxstrap
             else
                 Dialog.Message = "Upgrading Roblox...";
 
+            // check if we have at least 300 megabytes of free disk space
+            if (Utilities.GetFreeDiskSpace(Directories.Base) < 1024*1024*300)
+            {
+                Program.ShowMessageBox($"{Program.ProjectName} requires at least 300 MB of disk space to install Roblox. Please free up some disk space and try again.", MessageBoxIcon.Error);
+                Program.Exit(ERROR_INSTALL_FAILURE);
+                return;
+            }
+
             Directory.CreateDirectory(Directories.Base);
 
             Dialog.CancelEnabled = true;
diff --git a/Bloxstrap/Helpers/Utilities.cs b/Bloxstrap/Helpers/Utilities.cs
index 11530c4..75b4488 100644
--- a/Bloxstrap/Helpers/Utilities.cs
+++ b/Bloxstrap/Helpers/Utilities.cs
@@ -7,6 +7,17 @@ namespace Bloxstrap.Helpers
 {
     public class Utilities
     {
+        public static long GetFreeDiskSpace(string path)
+        {
+            foreach (DriveInfo drive in DriveInfo.GetDrives())
+            {
+                if (path.StartsWith(drive.Name))
+                    return drive.AvailableFreeSpace;
+            }
+
+            return -1;
+        }
+
         public static void OpenWebsite(string website)
         {
             Process.Start(new ProcessStartInfo { FileName = website, UseShellExecute = true });