diff --git a/ansible/roles/forrest/files/prometheus/blackbox.yml b/ansible/roles/forrest/files/prometheus/blackbox.yml
index 3822040..e3fc6a2 100644
--- a/ansible/roles/forrest/files/prometheus/blackbox.yml
+++ b/ansible/roles/forrest/files/prometheus/blackbox.yml
@@ -2,8 +2,6 @@ modules:
   http:
     prober: http
     timeout: 10s
-    http:
-      preferred_ip_protocol: ip4  # Docker network is v4 only
 
   https_redir:
     prober: http
@@ -16,7 +14,6 @@ modules:
       fail_if_header_not_matches:
         - header: Location
           regexp: ^https
-      preferred_ip_protocol: ip4  # Docker network is v4 only
 
   icmp:
     prober: icmp
diff --git a/ansible/roles/forrest/files/prometheus/docker-compose.yml b/ansible/roles/forrest/files/prometheus/docker-compose.yml
index 2aef6d0..db39ce9 100644
--- a/ansible/roles/forrest/files/prometheus/docker-compose.yml
+++ b/ansible/roles/forrest/files/prometheus/docker-compose.yml
@@ -56,3 +56,5 @@ services:
 networks:
   grafana:
     external: true
+  default:
+    enable_ipv6: true