diff --git a/.github/release/clusters/modules/gke/main.tf b/.github/release/clusters/modules/gke/main.tf
index 921f0c55..09368ce3 100644
--- a/.github/release/clusters/modules/gke/main.tf
+++ b/.github/release/clusters/modules/gke/main.tf
@@ -26,8 +26,9 @@ resource "google_container_cluster" "this" {
     }
 
     node_config {
-      machine_type = var.node_pool_machine_type
-      labels       = var.node_pool_labels
+      machine_type    = var.node_pool_machine_type
+      disk_size_gb    = 20
+      labels          = var.node_pool_labels
 
       oauth_scopes = [
         "https://www.googleapis.com/auth/cloud-platform",
@@ -45,9 +46,10 @@ resource "google_container_cluster" "this" {
     }
 
     node_config {
-      machine_type = var.tests_pool_machine_type
-      spot         = true
-      labels       = var.tests_pool_labels
+      machine_type    = var.tests_pool_machine_type
+      disk_size_gb    = 20
+      spot            = true
+      labels          = var.tests_pool_labels
 
       oauth_scopes = [
         "https://www.googleapis.com/auth/cloud-platform",