diff --git a/Cargo.toml b/Cargo.toml
index af3e99d..ddc86bf 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,7 +7,7 @@ resolver = "2"
 
 [workspace.package]
 edition = "2021"
-license = "MIT OR MPL-2.0"
+license = "MPL-2.0"
 repository = "https://github.com/hyperpolymath/januskey"
 authors = ["Jonathan D.A. Jewell <j.d.a.jewell@open.ac.uk>"]