diff --git a/_data/signed/thatonecalculator.yml b/_data/signed/thatonecalculator.yml
new file mode 100644
index 00000000..55932a00
--- /dev/null
+++ b/_data/signed/thatonecalculator.yml
@@ -0,0 +1,2 @@
+name: ThatOneCalculator
+link: https://t1c.dev/