diff --git a/about.toml b/about.toml
index 0f45be72..e9e60887 100644
--- a/about.toml
+++ b/about.toml
@@ -7,5 +7,6 @@ accepted = [
     "Unlicense",
     "Zlib",
     "CC0-1.0",
-    "MPL-2.0"
+    "MPL-2.0",
+    "GPL-3.0"
 ]