diff --git a/_data/signed/mariusz_kowalski.yaml b/_data/signed/mariusz_kowalski.yaml
new file mode 100644
index 000000000..c5a79db89
--- /dev/null
+++ b/_data/signed/mariusz_kowalski.yaml
@@ -0,0 +1,2 @@
+name: Mariusz Kowalski
+link: https://github.com/mariusz-kowalski