diff --git a/Cargo.toml b/Cargo.toml
index a18b298..483ce3d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -4,7 +4,7 @@ version = "0.4.0"
 edition = "2021"
 authors = ["NGnius (Graham) <ngniusness@gmail.com>"]
 description = "Music Playlist Script language (MPS)"
-license = "LGPL-2.1-only OR GPL-2.0-or-later"
+license = "LGPL-2.1-only OR GPL-3.0"
 repository = "https://github.com/NGnius/mps"
 keywords = ["audio", "playlist", "scripting", "language"]
 readme = "README.md"
diff --git a/README.md b/README.md
index f0d3b06..69675e1 100644
--- a/README.md
+++ b/README.md
@@ -32,6 +32,12 @@ One day I'll add pretty REPL example pictures and some script files...
 **No**. Technically, it was designed to be one, but it doesn't meet the requirements of a scripting language (yet). One day, I would like it be Turing-complete and then it could be considered a scripting language. At the moment it is barely a query language.
 
 
-### Contribution
+## License
+
+LGPL-2.1-only OR GPL-3.0
+
+**NOTE**: When advanced features are enabled, GPL-3.0 must be used.
+
+## Contribution
 
 This is a hobby project, so any contribution may take a while to be acknowledged and accepted.
diff --git a/README.tpl b/README.tpl
index 7aaeebf..aa3c6fc 100644
--- a/README.tpl
+++ b/README.tpl
@@ -4,6 +4,12 @@
 
 {{readme}}
 
-### Contribution
+## License
+
+{{license}}
+
+**NOTE**: When advanced features are enabled, GPL-3.0 must be used.
+
+## Contribution
 
 This is a hobby project, so any contribution may take a while to be acknowledged and accepted.