diff --git a/terraform/modules/elixir-app/main.tf b/terraform/modules/elixir-app/main.tf
index 4b42b9a7a..47e7d5c9f 100644
--- a/terraform/modules/elixir-app/main.tf
+++ b/terraform/modules/elixir-app/main.tf
@@ -622,7 +622,7 @@ resource "google_compute_firewall" "egress-ipv6" {
   direction = "EGRESS"
 
   target_tags        = ["app-${local.application_name}"]
-  destination_ranges = ["::/0"]
+  destination_ranges = ["::0/0"]
 
   allow {
     protocol = "all"
diff --git a/terraform/modules/relay-app/main.tf b/terraform/modules/relay-app/main.tf
index a451160ba..e2d9bb460 100644
--- a/terraform/modules/relay-app/main.tf
+++ b/terraform/modules/relay-app/main.tf
@@ -448,7 +448,7 @@ resource "google_compute_firewall" "ingress-ipv6" {
   direction = "INGRESS"
 
   target_tags   = ["app-${local.application_name}"]
-  source_ranges = ["::/0"]
+  source_ranges = ["::0/0"]
 
   allow {
     protocol = "udp"
@@ -479,7 +479,7 @@ resource "google_compute_firewall" "egress-ipv6" {
   direction = "EGRESS"
 
   target_tags        = ["app-${local.application_name}"]
-  destination_ranges = ["::/0"]
+  destination_ranges = ["::0/0"]
 
   allow {
     protocol = "udp"