mc-truststore (Let's Encrypt & Sessionserver fix)

Simple universal mod to use newer java cacerts alongside the (possibly outdated) current cacerts.

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About this Mod

mc-truststore

Simple universal mod to use newer java cacerts alongside the (possibly outdated) current cacerts.

Usage

Install it like any other mod for your favorite loader, it should support the following loaders:

LaunchWrapper: Bootstrap through LaunchWrapper, compatible with forge from 1.6.4 to 1.12.2
ModLauncher: Bootstrap through ModLauncher, compatible with (neo)forge from 1.13.2 to latest
Fabric Loader: Bootstrap through Fabric Loader, compatible with any Minecraft version using fabric

The mod will attempt to inject a custom TrustManager in the default SSLContext that merges the default TrustManager and a new TrustManager using the keystore from newer java versions.
If the mod loads successfully it should now be possible to request URLs from servers using Let's Encrypt and DigiCert as their CA.

This should fix problems with mods requesting from a service using let's encrypt and minecraft unable to authenticate on ancient java versions.

Unless you are looking for a solution for those issues, you likely does not need the mod, however nothing should break if the mod is installed unnecessarily.

Available Versions

mc-truststore-1.0release

MC 1.6.4, 1.7.2, 1.7.3, 1.7.4, 1.7.5, 1.7.6, 1.7.7, 1.7.8, 1.7.9, 1.7.10, 1.8, 1.8.1, 1.8.2, 1.8.3, 1.8.4, 1.8.5, 1.8.6, 1.8.7, 1.8.8, 1.8.9, 1.9, 1.9.1, 1.9.2, 1.9.3, 1.9.4, 1.10, 1.10.1, 1.10.2, 1.11, 1.11.1, 1.11.2, 1.12, 1.12.1, 1.12.2, 1.13, 1.13.1, 1.13.2, 1.14, 1.14.1, 1.14.2, 1.14.3, 1.14.4, 1.15, 1.15.1, 1.15.2, 1.16, 1.16.1, 1.16.2, 1.16.3, 1.16.4, 1.16.5, 1.17, 1.17.1, 1.18, 1.18.1, 1.18.2, 1.19, 1.19.1, 1.19.2, 1.19.3, 1.19.4, 1.20, 1.20.1, 1.20.2, 1.20.3, 1.20.4, 1.20.5, 1.20.6, 1.21, 1.21.1, 1.21.2, 1.21.3, 1.21.4, 1.21.5, 1.21.6, 1.21.7, 1.21.8, 1.21.9, 1.21.10, 1.21.11fabric, forge, neoforge, quilt

October 6, 2025

How to Install mc-truststore (Let's Encrypt & Sessionserver fix) on Your Server

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

Set fabric Loader

In the panel under "Egg", select the fabric loader and matching Minecraft version (1.21.11).

Install Mod

Open the mod browser in the dashboard and search for "mc-truststore (Let's Encrypt & Sessionserver fix)". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

fabricforgeneoforgequilt

Minecraft Versions

1.21.11, 1.21.10, 1.21.9 (+77 more)

Server-side

~ Optional

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

mc-truststore (Let's Encrypt & Sessionserver fix) server crashes on startup – what to do?

Most common cause: wrong fabric version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21.11). You can switch loaders with one click in the panel.

Is mc-truststore (Let's Encrypt & Sessionserver fix) compatible with fabric and forge and neoforge and quilt?

mc-truststore (Let's Encrypt & Sessionserver fix) officially supports fabric, forge, neoforge, quilt for Minecraft 1.21.11, 1.21.10, 1.21.9. Note: Forge and Fabric mods are NOT cross-compatible – pick one loader and stick with it. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with mc-truststore (Let's Encrypt & Sessionserver fix) – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if mc-truststore (Let's Encrypt & Sessionserver fix) consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.