diff --git a/internal/templates/email.go b/internal/templates/email.go
index 43fbdfc..0b704a8 100644
--- a/internal/templates/email.go
+++ b/internal/templates/email.go
@@ -9,11 +9,11 @@ import (
 type EmailTemplate string
 
 const (
-	EmailContact      EmailTemplate = "contact.mjml"
-	EmailEndOfService EmailTemplate = "end-of-service.mjml"
-	EmailErrorAdmin   EmailTemplate = "error-admin.mjml"
-	EmailIntro        EmailTemplate = "intro.mjml"
-	EmailReleases     EmailTemplate = "releases.mjml"
+	EmailContact      EmailTemplate = "contact.gohtml"
+	EmailEndOfService EmailTemplate = "end-of-service.gohtml"
+	EmailErrorAdmin   EmailTemplate = "error-admin.gohtml"
+	EmailIntro        EmailTemplate = "intro.gohtml"
+	EmailReleases     EmailTemplate = "releases.gohtml"
 )
 
 // String represents the email template as a string, being the file name.
diff --git a/internal/templates/email_test.go b/internal/templates/email_test.go
index 9cab0b7..36970e2 100644
--- a/internal/templates/email_test.go
+++ b/internal/templates/email_test.go
@@ -15,11 +15,11 @@ var emailTemplates = []templates.EmailTemplate{
 
 func TestEmailTemplate_String(t *testing.T) {
 	want := []string{
-		"contact.mjml",
-		"end-of-service.mjml",
-		"error-admin.mjml",
-		"intro.mjml",
-		"releases.mjml",
+		"contact.gohtml",
+		"end-of-service.gohtml",
+		"error-admin.gohtml",
+		"intro.gohtml",
+		"releases.gohtml",
 	}
 	for i, template := range emailTemplates {
 		if got := template.String(); got != want[i] {