diff --git a/examples/landing_zone/main.tf b/examples/landing_zone/main.tf
index e23e9d30..731557d3 100644
--- a/examples/landing_zone/main.tf
+++ b/examples/landing_zone/main.tf
@@ -17,7 +17,7 @@ module "resource_group" {
 module "cos_bucket" {
   count                  = var.enable_vpc_flow_logs ? 1 : 0
   source                 = "terraform-ibm-modules/cos/ibm"
-  version                = "8.21.3"
+  version                = "8.21.6"
   resource_group_id      = module.resource_group.resource_group_id
   region                 = var.region
   cross_region_location  = null
diff --git a/solutions/fully-configurable/README.md b/solutions/fully-configurable/README.md
index 4b925bf1..a4629165 100644
--- a/solutions/fully-configurable/README.md
+++ b/solutions/fully-configurable/README.md
@@ -43,11 +43,11 @@ This solution supports provisioning and configuring the following infrastructure
 
 | Name | Source | Version |
 |------|--------|---------|
-| <a name="module_cos_buckets"></a> [cos\_buckets](#module\_cos\_buckets) | terraform-ibm-modules/cos/ibm//modules/buckets | 8.19.2 |
+| <a name="module_cos_buckets"></a> [cos\_buckets](#module\_cos\_buckets) | terraform-ibm-modules/cos/ibm//modules/buckets | 8.21.6 |
 | <a name="module_existing_cos_crn_parser"></a> [existing\_cos\_crn\_parser](#module\_existing\_cos\_crn\_parser) | terraform-ibm-modules/common-utilities/ibm//modules/crn-parser | 1.1.0 |
 | <a name="module_existing_kms_instance_crn_parser"></a> [existing\_kms\_instance\_crn\_parser](#module\_existing\_kms\_instance\_crn\_parser) | terraform-ibm-modules/common-utilities/ibm//modules/crn-parser | 1.1.0 |
 | <a name="module_existing_kms_key_crn_parser"></a> [existing\_kms\_key\_crn\_parser](#module\_existing\_kms\_key\_crn\_parser) | terraform-ibm-modules/common-utilities/ibm//modules/crn-parser | 1.1.0 |
-| <a name="module_kms"></a> [kms](#module\_kms) | terraform-ibm-modules/kms-all-inclusive/ibm | 4.19.5 |
+| <a name="module_kms"></a> [kms](#module\_kms) | terraform-ibm-modules/kms-all-inclusive/ibm | 4.21.3 |
 | <a name="module_resource_group"></a> [resource\_group](#module\_resource\_group) | terraform-ibm-modules/resource-group/ibm | 1.1.6 |
 | <a name="module_vpc"></a> [vpc](#module\_vpc) | ../../ | n/a |
 | <a name="module_vpe_gateway"></a> [vpe\_gateway](#module\_vpe\_gateway) | terraform-ibm-modules/vpe-gateway/ibm | 4.5.0 |
diff --git a/solutions/fully-configurable/main.tf b/solutions/fully-configurable/main.tf
index 70feb0ad..edd56045 100644
--- a/solutions/fully-configurable/main.tf
+++ b/solutions/fully-configurable/main.tf
@@ -73,7 +73,7 @@ module "cos_buckets" {
   count          = var.enable_vpc_flow_logs ? 1 : 0
   depends_on     = [time_sleep.wait_for_cross_account_authorization_policy[0]]
   source         = "terraform-ibm-modules/cos/ibm//modules/buckets"
-  version        = "8.19.2"
+  version        = "8.21.6"
   bucket_configs = local.bucket_config
 }
 
@@ -163,7 +163,7 @@ module "kms" {
   }
   count                       = local.create_kms_key ? 1 : 0 # no need to create any KMS resources if not passing an existing KMS CRN or existing KMS key CRN is provided
   source                      = "terraform-ibm-modules/kms-all-inclusive/ibm"
-  version                     = "4.19.5"
+  version                     = "4.21.3"
   create_key_protect_instance = false
   region                      = local.kms_region
   existing_kms_instance_crn   = var.existing_kms_instance_crn