diff --git a/tasks/main.yml b/tasks/main.yml
index 3b2518b..7168c9c 100644
--- a/tasks/main.yml
+++ b/tasks/main.yml
@@ -4,7 +4,7 @@
     package:
       name: "{{nessus_agent_package}}"
       update_cache: yes
-      cache_valid_time: "{{apt_cache_valid_time | default (3600)}}"
+      cache_valid_time: "{{apt_cache_valid_time | default (omit)}}"
     when: "'.deb' not in nessus_agent_package"
 
   - name: Install Nessus Agent from .deb package