diff --git a/_data/signed/csemilevel.yaml b/_data/signed/csemilevel.yaml
new file mode 100644
index 00000000..332a351c
--- /dev/null
+++ b/_data/signed/csemilevel.yaml
@@ -0,0 +1,2 @@
+name: Marlon Groenendijk
+link: http://marlon.ws/
diff --git a/_data/signed/tmcghan.yaml b/_data/signed/tmcghan.yaml
index d71e2d17..c4f53f6e 100644
--- a/_data/signed/tmcghan.yaml
+++ b/_data/signed/tmcghan.yaml
@@ -1,2 +1,2 @@
 name: Thomas McGhan
-link: thomas.mcghan@gmail.com
+link: mailto:thomas.mcghan@gmail.com