Index: README.md
==================================================================
--- README.md
+++ README.md
@@ -83,11 +83,11 @@
 
 ---
 
 ## Supported runtimes & prerequisites
 
-* **Tcl**: Standard Tcl (8.5+) environments.
+* **Tcl**: Standard Tcl (8.4+) environments, which must include the `tcltls` package.
 * **Eagle**: Any environment that can run Eagle scripts.
 * **Platforms**: Windows, Linux, macOS (no OS‑specific assumptions in the client libraries).
 * **OpenPGP**: An implementation of the OpenPGP standard (e.g. GPG).
 
 * **Tools inside this repository**:

Index: README.md.asc
==================================================================
--- README.md.asc
+++ README.md.asc
@@ -1,17 +1,17 @@
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