diff --git a/composer.json b/composer.json
index 4ef9cc8..8ab3894 100644
--- a/composer.json
+++ b/composer.json
@@ -4,6 +4,7 @@
     "keywords": [
         "ACME",
         "letsencrypt",
+        "certificate",
         "https",
         "encryption",
         "ssl",