diff --git a/_data/signed/abacatte.yaml b/_data/signed/abacatte.yaml
index 26f3037a..a8fcdc30 100644
--- a/_data/signed/abacatte.yaml
+++ b/_data/signed/abacatte.yaml
@@ -1,2 +1,2 @@
 name: Murilo Antonio
-link: mugidor@riseup.net
+link: mailto:mugidor@riseup.net
diff --git a/_data/signed/br4nnigan.yaml b/_data/signed/br4nnigan.yaml
index 6fd8875d..8d572909 100644
--- a/_data/signed/br4nnigan.yaml
+++ b/_data/signed/br4nnigan.yaml
@@ -1,2 +1,2 @@
 name: Nils Poltoraczyk
-link: laz.brannigan@gmail.com
+link: mailto:laz.brannigan@gmail.com
diff --git a/_data/signed/gem.yaml b/_data/signed/gem.yaml
index 2a468170..a61ac61b 100644
--- a/_data/signed/gem.yaml
+++ b/_data/signed/gem.yaml
@@ -1,2 +1,2 @@
 name: Gary E. Miller
-link: gem@rellim.com
+link: mailto:gem@rellim.com
diff --git a/_data/signed/mtlben.yaml b/_data/signed/mtlben.yaml
index 1b687b0a..6a664089 100644
--- a/_data/signed/mtlben.yaml
+++ b/_data/signed/mtlben.yaml
@@ -1,2 +1,2 @@
 name: Benjamin Rochefort (FSF associate member since 2013)
-link: mtlben@member.fsf.org
+link: mailto:mtlben@member.fsf.org
diff --git a/_data/signed/riux.yaml b/_data/signed/riux.yaml
index e07656e2..5327246d 100644
--- a/_data/signed/riux.yaml
+++ b/_data/signed/riux.yaml
@@ -1,2 +1,2 @@
 name: riux
-link: riux@member.fsf.org
+link: mailto:riux@member.fsf.org