diff --git a/README.md b/README.md
index 90a785a6..d0268e32 100644
--- a/README.md
+++ b/README.md
@@ -299,6 +299,7 @@ to follow with `extra.follow_branch`.*
 | [`language_scala`](plugins/language_scala.lua?raw=1)                                                            | Syntax for the [Scala](https://scala-lang.org/) programming language                                                                                                                |
 | [`language_sh`](plugins/language_sh.lua?raw=1)                                                                  | Syntax for shell scripting language                                                                                                                                                 |
 | [`language_ssh_config`](plugins/language_ssh_config.lua?raw=1)                                                  | Syntax for ssh & sshd config files                                                                                                                                                  |
+| [`language_st`](plugins/language_st.lua?raw=1)                                                                  | Syntax for PLC Structured Text IEC 61131-3 standard.                                                                                                                                |
 | [`language_swift`](plugins/language_swift.lua?raw=1)                                                            | Syntax for the [Swift](https://developer.apple.com/swift/) programming language                                                                                                     |
 | [`language_tal`](plugins/language_tal.lua?raw=1)                                                                | Syntax for the [Uxntal](https://wiki.xxiivv.com/site/uxntal) assembly language                                                                                                      |
 | [`language_tcl`](plugins/language_tcl.lua?raw=1)                                                                | Syntax for the [Tcl](https://www.tcl.tk/) programming language                                                                                                                      |