diff --git a/composer.json b/composer.json
index c0ce636..fa69640 100644
--- a/composer.json
+++ b/composer.json
@@ -9,7 +9,7 @@
         "issues": "https://github.com/strarsis/tablepress-rowspan-all/issues",
         "source": "https://github.com/strarsis/tablepress-rowspan-all"
     },
-    "license": "GPLv2 or later",
+    "license": "GPL-2.0-or-later",
     "authors": [
         {
             "name": "strarsis",