diff --git a/roles/ntopng/vars/os_Ubuntu_20.yml b/roles/ntopng/vars/os_Ubuntu_20.yml
index aba7ef3..e72a8f0 100644
--- a/roles/ntopng/vars/os_Ubuntu_20.yml
+++ b/roles/ntopng/vars/os_Ubuntu_20.yml
@@ -17,3 +17,4 @@ ntopng_dependency_packages:
   - libczmq-dev
   - cmake
   - libpcap-dev
+  - libssl-dev