diff --git a/tasks/configure_certificates.yml b/tasks/configure_certificates.yml
index a3fee28..36d2986 100644
--- a/tasks/configure_certificates.yml
+++ b/tasks/configure_certificates.yml
@@ -7,7 +7,7 @@
 
 - name: Extract IP from URL content
   set_fact:
-    node_external_ip: checkip_url | regex_search('[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}')
+    node_external_ip: "{{ checkip_url | regex_search('[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}') }}"
 
 - name: Set fact for mail server FQDN
   set_fact: