5 Reasons Your VPN Speed Dropped After an Update

A VPN speed drop after an update is frustrating — especially when everything was working fine before. The most common culprit is that the update changed something under the hood: a protocol switch, new encryption defaults, or server-side tweaks that your app is now trying to adapt to. The good news? It's almost always fixable.

I've seen this happen a lot, and it's rarely a sign that something is permanently broken. Updates are supposed to improve things, but they can occasionally shake up your connection settings in ways that hurt performance — at least temporarily. Let's dig into exactly what's going on and how to sort it out.

Why VPN Updates Sometimes Hurt Your Speed

When a VPN app pushes an update, it's not just patching bugs. Updates can change the default VPN protocol, adjust encryption strength, modify how the app routes traffic, or even shift which servers you connect to automatically. Any one of these changes can noticeably affect your speeds — sometimes for the better, sometimes not.

Here's the thing: encryption is the heart of how a VPN works, and heavier encryption means more processing power is needed on your device. If an update bumped your encryption up a notch without telling you, your CPU might be working harder than before. According to the Electronic Frontier Foundation, the trade-off between security and performance is one of the core tensions in privacy tool design — and VPN updates often tip that balance one way or another.

Another common issue is protocol switching. Many VPNs default to OpenVPN or IKEv2, but newer protocols like WireGuard are significantly faster. If an update accidentally switched you away from WireGuard — or to a slower fallback protocol — that alone could explain a major speed drop. It's worth checking your protocol settings right after any update.

So, what are the five most likely reasons your VPN slowed down after that update? Let's go through them one by one.

1. Protocol change. The update may have switched your default protocol to something slower. OpenVPN, while reliable, is noticeably slower than WireGuard or NordLynx on most devices. Check your app settings and manually select the fastest protocol available.

2. New encryption defaults. Some updates increase encryption strength as a security improvement. This is good for privacy, but it can add overhead that slows things down — especially on older devices or slower internet connections.

3. Server list refresh. Updates sometimes reset your preferred server or auto-connect settings, connecting you to a geographically farther or more congested server. A server that's physically closer to you will almost always be faster.

4. Background processes. A freshly installed update might trigger background processes — like a full app reindex or cache rebuild — that temporarily hog resources. This often resolves itself within a few hours.

5. Bug in the update itself. It happens. Software isn't perfect, and sometimes an update introduces a performance regression. Checking community forums or the VPN's changelog can tell you if others are experiencing the same issue.

How to Diagnose and Fix the Speed Drop

Before you start changing settings randomly, it helps to actually measure what's happening. Run a speed test with your VPN connected, then run one without it. The difference tells you how much overhead your VPN is adding. A well-optimized VPN should only reduce your speeds by around 10–20% on a good day. If you're seeing 50% or more, something is definitely off.

Start with the protocol. Open your VPN app's settings and look for the protocol or connection type option. If you see WireGuard or NordLynx listed, switch to that. According to Wikipedia's overview of WireGuard, this protocol was specifically designed to be faster and leaner than older alternatives like OpenVPN, using a much smaller codebase and more efficient cryptography. In my experience, switching to WireGuard alone can recover most of a speed loss caused by a protocol change.

Next, check your server selection. If the update reset your auto-connect settings, you might be connecting to a server that's far away or overloaded. Manually pick a server that's geographically close to you — ideally in the same country or a neighboring one. Most VPN apps have a "recommended" or "fastest server" option that does this automatically.

If neither of those helps, try a clean reinstall. Uninstall the VPN app completely, restart your device, then download and install the latest version fresh. This clears out any corrupted cache or config files that might have been left behind during the update process. It sounds basic, but it works more often than you'd think.

Also worth checking: your device's performance. If the update happened alongside a system update on your phone or computer, your device might be running background tasks that are eating into available processing power. Give it a few hours and test again.

Getting the Best Performance From Your VPN

Here's a step-by-step approach to recovering your speed after a VPN update:

Step 1: Run a baseline speed test at Speedtest.net — first with the VPN off, then with it on. Note the difference in download and upload speeds.

Step 2: Open your VPN app and navigate to Settings, then Protocol (or Connection Type). Switch to WireGuard or the fastest protocol listed.

Step 3: Disconnect and reconnect to a server that's close to your physical location. Avoid servers in distant countries unless you specifically need them for geo-unblocking.

Step 4: If speeds are still poor, check the VPN provider's status page or community forums. Look for reports of the same issue — this tells you if it's a widespread bug rather than something specific to your setup.

Step 5: Try a clean reinstall. Uninstall the app, reboot your device, reinstall from the official source, and log back in. Don't restore any old settings — start fresh.

Step 6: If nothing works, contact the VPN's support team with your speed test results and the protocol you're using. A good VPN provider will take this seriously.

Common Mistakes That Make Things Worse

One thing I see people do a lot is immediately switch to a different VPN server in another country, thinking a "fresh" server will be faster. But connecting to a server in Japan when you're based in the US is almost always going to be slower — distance matters a lot when it comes to latency and throughput. Stick to nearby servers unless you have a specific reason not to.

Another mistake is leaving the protocol on "automatic." Auto-selection sounds convenient, but after an update it might not be choosing the optimal protocol for your network. Manual selection gives you more control, and once you find what works, you can leave it set.

Some people also try to fix speed issues by disabling features like the kill switch or DNS leak protection. Don't do this. Those features exist for your security, and turning them off to squeeze out a bit more speed is a bad trade. The performance impact of those features is minimal — they're not the cause of a major speed drop.

Finally, if you're on a mobile device, make sure the VPN app has the right permissions and isn't being throttled by your phone's battery saver mode. Battery optimization features on Android and iOS can restrict background app activity, which sometimes interferes with VPN performance. Check your device's battery settings and exclude the VPN app from optimization if needed.

It's also worth noting that some ISPs throttle VPN traffic specifically — they detect the VPN tunnel and slow it down intentionally. According to discussions in the r/VPN community on Reddit, this is more common than most people realize, and switching to a VPN protocol that's harder to detect (like WireGuard or a stealth/obfuscated mode) can sometimes bypass this throttling.

Frequently Asked Questions

Why did my VPN get slower after the latest update?

The most likely reasons are a protocol change, new encryption defaults, or a server reset that came with the update. Check your protocol settings first — switching to WireGuard or NordLynx is usually the fastest fix. If that doesn't help, try reconnecting to a nearby server or doing a clean reinstall of the app.

How much speed loss is normal with a VPN?

A well-optimized VPN should reduce your speeds by roughly 10–20% under normal conditions. If you're seeing drops of 50% or more, something is misconfigured or there's a bug. Premium VPNs like NordVPN, which VPNTierLists.com rates as S-Tier, consistently deliver some of the lowest overhead in independent speed tests thanks to the NordLynx protocol built on WireGuard.

Will the speed come back on its own?

Sometimes, yes. If the slowdown is caused by background processes running after the update, things often normalize within a few hours. But if it's a protocol or server configuration issue, it won't fix itself — you'll need to adjust your settings manually or wait for the VPN provider to push a patch.

Should I roll back to the previous version of the VPN app?

This is a last resort and generally not recommended. Older versions may have security vulnerabilities that the update was specifically designed to fix. It's better to troubleshoot the current version or contact support than to run outdated software. If you're on a desktop, you might find older installers on the VPN's official site, but use them cautiously and only temporarily.

Bottom Line

A VPN speed drop after an update is annoying, but it's almost never permanent. The fix is usually something simple — a protocol switch, a server change, or a clean reinstall. Start with the protocol (switch to WireGuard if you haven't already), then work through the other steps before assuming something is seriously wrong.

If you're consistently running into performance issues and your current VPN doesn't seem to be keeping up, it might be worth switching to something more reliable. NordVPN is our top pick at VPNTierLists.com — it uses the NordLynx protocol by default, which is built on WireGuard and consistently delivers some of the fastest speeds we've tested across 6,400+ servers worldwide.

Good luck getting those speeds back. And if you're still stuck, the r/VPN subreddit is a genuinely helpful community where people share real-world troubleshooting tips — worth a browse if you've exhausted the basics.

Sources: Electronic Frontier Foundation on privacy tool trade-offs; Wikipedia — WireGuard; Reddit r/VPN community on ISP throttling and protocol behavior.

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