diff --git a/tasks/main.yml b/tasks/main.yml
index 9ee18b8..838c80a 100644
--- a/tasks/main.yml
+++ b/tasks/main.yml
@@ -16,6 +16,7 @@
     - gobjc
     - libldap-common
     - libxml2-dev
+    - libytnef-dev
     - tzdata
     - zlib1g
     - build-essential