diff --git a/modules/node-group/main.tf b/modules/node-group/main.tf
index 4e0c666..ff5f7bc 100644
--- a/modules/node-group/main.tf
+++ b/modules/node-group/main.tf
@@ -200,7 +200,7 @@ resource "exoscale_compute_instance" "nodes" {
     ignore_changes = [
       template_id,
       user_data,
-      elastic_ip_ids
+      elastic_ip_ids,
     ]
   }
 }
diff --git a/modules/node-group/variables.tf b/modules/node-group/variables.tf
index 466ae32..041a9ec 100644
--- a/modules/node-group/variables.tf
+++ b/modules/node-group/variables.tf
@@ -30,11 +30,11 @@ variable "instance_type" {
 
 variable "root_disk_size" {
   type    = number
-  default = 120
+  default = 100
 
   validation {
-    condition     = var.root_disk_size >= 120
-    error_message = "The minimum supported root disk size for OCP4 is 120GB."
+    condition     = var.root_disk_size >= 100
+    error_message = "The minimum supported root disk size for OCP4 is 100GB."
   }
 }
 
diff --git a/variables.tf b/variables.tf
index 8ed81ff..0798fce 100644
--- a/variables.tf
+++ b/variables.tf
@@ -113,11 +113,11 @@ variable "storage_state" {
 
 variable "root_disk_size" {
   type    = number
-  default = 120
+  default = 100
 
   validation {
-    condition     = var.root_disk_size >= 120
-    error_message = "The minimum supported root disk size is 120GB."
+    condition     = var.root_disk_size >= 100
+    error_message = "The minimum supported root disk size is 100GB."
   }
 }