diff --git a/deployment/environments/vitamui_extra_vars.yml b/deployment/environments/vitamui_extra_vars.yml
index 71acaca5324189013c34962737101fcfecd814f3..ec0f3ca58032054bf00ea9d01a8c151655b06c23 100644
--- a/deployment/environments/vitamui_extra_vars.yml
+++ b/deployment/environments/vitamui_extra_vars.yml
@@ -45,6 +45,9 @@ vitam_repositories:
   - key: vitam-extras
     value: https://download.programmevitam.fr/vitam_nightly/rpm/vitam-extras/
 
+# To avoid installation of internet repositories (like epel for example)
+disable_internet_repositories_install: true # default value if unset: false
+
 ###
 # reverse_proxy_conf.yml
 reverse: apache
diff --git a/deployment/roles/logstash/tasks/main.yml b/deployment/roles/logstash/tasks/main.yml
index b15bb96c811d8e1180c94807f9c7ea1772b41eb5..1c533c604fd92383034e65dbfbd5e715bcede142 100644
--- a/deployment/roles/logstash/tasks/main.yml
+++ b/deployment/roles/logstash/tasks/main.yml
@@ -21,7 +21,7 @@
   delay: "{{ packages_install_retries_delay }}"
   when:
     - ansible_os_family == "Debian"
-    - disable_internet_repositories_install == false
+    - disable_internet_repositories_install | default(false) | bool == false
 
 - name: "install openjdk only when Debian"
   apt:
@@ -33,7 +33,7 @@
   delay: "{{ packages_install_retries_delay }}"
   when:
     - ansible_os_family == "Debian"
-    - disable_internet_repositories_install == true
+    - disable_internet_repositories_install | default(false) | bool == true
 
 - name: Install logstash package from repo
   package:
diff --git a/deployment/roles/normalize/tasks/vitamui.yml b/deployment/roles/normalize/tasks/vitamui.yml
index ce69b423e6a2ba9eac2911b335eb6ce62ff241db..e17f5c8dd140864763de7a7eb56b2ffda0e8859a 100644
--- a/deployment/roles/normalize/tasks/vitamui.yml
+++ b/deployment/roles/normalize/tasks/vitamui.yml
@@ -37,7 +37,7 @@
   delay: "{{ packages_install_retries_delay }}"
   when:
     - ansible_os_family == "Debian"
-    - disable_internet_repositories_install == false
+    - disable_internet_repositories_install | default(false) | bool == false
 
 - name: "install openjdk only when Debian"
   apt:
@@ -49,4 +49,4 @@
   delay: "{{ packages_install_retries_delay }}"
   when:
     - ansible_os_family == "Debian"
-    - disable_internet_repositories_install == true
+    - disable_internet_repositories_install | default(false) | bool == true