diff --git a/solutions/agents/main.tf b/solutions/agents/main.tf
index ce22e4ed..10c01b0d 100644
--- a/solutions/agents/main.tf
+++ b/solutions/agents/main.tf
@@ -11,7 +11,7 @@ data "ibm_container_cluster_config" "cluster_config" {
 
 module "observability_agents" {
   source                       = "terraform-ibm-modules/observability-agents/ibm"
-  version                      = "2.3.3"
+  version                      = "2.3.6"
   cluster_id                   = var.cluster_id
   cluster_resource_group_id    = var.cluster_resource_group_id
   cluster_config_endpoint_type = var.cluster_config_endpoint_type
diff --git a/solutions/instances/main.tf b/solutions/instances/main.tf
index ac62605c..efb0a857 100644
--- a/solutions/instances/main.tf
+++ b/solutions/instances/main.tf
@@ -228,21 +228,21 @@ resource "ibm_iam_authorization_policy" "cos_policy" {
 module "en_crn_parser" {
   count   = length(local.cloud_logs_existing_en_instances)
   source  = "terraform-ibm-modules/common-utilities/ibm//modules/crn-parser"
-  version = "1.0.0"
+  version = "1.1.0"
   crn     = local.cloud_logs_existing_en_instances[count.index]["instance_crn"]
 }
 
 module "cloud_monitoring_crn_parser" {
   count   = var.existing_cloud_monitoring_crn != null ? 1 : 0
   source  = "terraform-ibm-modules/common-utilities/ibm//modules/crn-parser"
-  version = "1.0.0"
+  version = "1.1.0"
   crn     = var.existing_cloud_monitoring_crn
 }
 
 module "observability_instance" {
   depends_on        = [time_sleep.wait_for_atracker_cos_authorization_policy]
   source            = "terraform-ibm-modules/observability-instances/ibm"
-  version           = "3.3.1"
+  version           = "3.4.0"
   region            = var.region
   resource_group_id = module.resource_group.resource_group_id
 
@@ -359,7 +359,7 @@ module "kms" {
   }
   count                       = (var.existing_cos_kms_key_crn != null || (length(coalesce(local.buckets_config, [])) == 0)) ? 0 : 1 # no need to create any KMS resources if passing an existing key, or bucket
   source                      = "terraform-ibm-modules/kms-all-inclusive/ibm"
-  version                     = "4.15.13"
+  version                     = "4.19.1"
   create_key_protect_instance = false
   region                      = local.kms_region
   existing_kms_instance_crn   = var.existing_kms_instance_crn
@@ -449,7 +449,7 @@ module "cos_instance" {
   }
   count                    = var.existing_cos_instance_crn == null && length(coalesce(local.buckets_config, [])) != 0 ? 1 : 0 # no need to call COS module if consumer is using existing COS instance
   source                   = "terraform-ibm-modules/cos/ibm//modules/fscloud"
-  version                  = "8.14.1"
+  version                  = "8.16.4"
   resource_group_id        = local.cos_resource_group_id
   create_cos_instance      = true
   cos_instance_name        = var.prefix != null ? "${var.prefix}-${var.cos_instance_name}" : var.cos_instance_name
@@ -466,7 +466,7 @@ module "cos_bucket" {
   }
   count   = length(coalesce(local.buckets_config, [])) != 0 ? 1 : 0 # no need to call COS module if consumer is using existing COS bucket
   source  = "terraform-ibm-modules/cos/ibm//modules/buckets"
-  version = "8.14.1"
+  version = "8.16.4"
   bucket_configs = [
     for value in local.buckets_config :
     {
diff --git a/tests/resources/existing-resources/main.tf b/tests/resources/existing-resources/main.tf
index 9478d2e5..b4b3e4bf 100644
--- a/tests/resources/existing-resources/main.tf
+++ b/tests/resources/existing-resources/main.tf
@@ -16,7 +16,7 @@ module "resource_group" {
 
 module "cos" {
   source                 = "terraform-ibm-modules/cos/ibm"
-  version                = "8.11.11"
+  version                = "8.16.4"
   resource_group_id      = module.resource_group.resource_group_id
   region                 = var.region
   cos_instance_name      = "${var.prefix}-cos"
@@ -28,7 +28,7 @@ module "cos" {
 
 module "additional_cos_bucket" {
   source                   = "terraform-ibm-modules/cos/ibm"
-  version                  = "8.11.11"
+  version                  = "8.16.4"
   region                   = var.region
   create_cos_instance      = false
   existing_cos_instance_id = module.cos.cos_instance_id
@@ -38,7 +38,7 @@ module "additional_cos_bucket" {
 
 module "cloud_log_buckets" {
   source  = "terraform-ibm-modules/cos/ibm//modules/buckets"
-  version = "8.6.2"
+  version = "8.16.4"
   bucket_configs = [
     {
       bucket_name            = "${var.prefix}-data-bucket"
@@ -65,7 +65,7 @@ module "cloud_log_buckets" {
 
 module "event_notification_1" {
   source            = "terraform-ibm-modules/event-notifications/ibm"
-  version           = "1.6.5"
+  version           = "1.15.11"
   resource_group_id = module.resource_group.resource_group_id
   name              = "${var.prefix}-en-1"
   tags              = var.resource_tags
@@ -76,7 +76,7 @@ module "event_notification_1" {
 
 module "event_notification_2" {
   source            = "terraform-ibm-modules/event-notifications/ibm"
-  version           = "1.6.5"
+  version           = "1.15.11"
   resource_group_id = module.resource_group.resource_group_id
   name              = "${var.prefix}-en-2"
   tags              = var.resource_tags
diff --git a/tests/resources/main.tf b/tests/resources/main.tf
index 0a071416..1c9d3a4c 100644
--- a/tests/resources/main.tf
+++ b/tests/resources/main.tf
@@ -15,7 +15,7 @@ module "resource_group" {
 ##############################################################################
 
 module "landing_zone" {
-  source                              = "git::https://github.com/terraform-ibm-modules/terraform-ibm-landing-zone//patterns//roks//module?ref=v6.0.1"
+  source                              = "git::https://github.com/terraform-ibm-modules/terraform-ibm-landing-zone//patterns//roks//module?ref=v6.6.3"
   region                              = var.region
   prefix                              = var.prefix
   tags                                = var.resource_tags
@@ -33,7 +33,7 @@ module "landing_zone" {
 
 module "cos" {
   source            = "terraform-ibm-modules/cos/ibm"
-  version           = "8.11.14"
+  version           = "8.16.4"
   resource_group_id = module.resource_group.resource_group_id
   cos_instance_name = "${var.prefix}-cos"
   cos_tags          = var.resource_tags
@@ -51,7 +51,7 @@ locals {
 
 module "buckets" {
   source  = "terraform-ibm-modules/cos/ibm//modules/buckets"
-  version = "8.11.14"
+  version = "8.16.4"
   bucket_configs = [
     {
       bucket_name            = local.logs_bucket_name
@@ -81,7 +81,7 @@ locals {
 
 module "observability_instances" {
   source                             = "terraform-ibm-modules/observability-instances/ibm"
-  version                            = "3.0.2"
+  version                            = "3.4.0"
   resource_group_id                  = local.cluster_resource_group_id
   region                             = var.region
   cloud_monitoring_plan              = "graduated-tier"
@@ -117,7 +117,7 @@ locals {
 
 module "trusted_profile" {
   source                      = "terraform-ibm-modules/trusted-profile/ibm"
-  version                     = "1.0.4"
+  version                     = "1.0.5"
   trusted_profile_name        = "${var.prefix}-profile"
   trusted_profile_description = "Logs agent Trusted Profile"
   # As a `Sender`, you can send logs to your IBM Cloud Logs service instance - but not query or tail logs. This role is meant to be used by agents and routers sending logs.