diff --git a/aks/main.tf b/aks/main.tf
index 763f9557..ac554dae 100644
--- a/aks/main.tf
+++ b/aks/main.tf
@@ -32,7 +32,6 @@ module "thanos" {
 
   cluster_name           = var.cluster_name
   base_domain            = var.base_domain
-  argocd_namespace       = var.argocd_namespace
   argocd_project         = var.argocd_project
   argocd_labels          = var.argocd_labels
   destination_cluster    = var.destination_cluster
diff --git a/eks/main.tf b/eks/main.tf
index 0ba5dbd8..1d29690d 100644
--- a/eks/main.tf
+++ b/eks/main.tf
@@ -3,7 +3,6 @@ module "thanos" {
 
   cluster_name           = var.cluster_name
   base_domain            = var.base_domain
-  argocd_namespace       = var.argocd_namespace
   argocd_project         = var.argocd_project
   argocd_labels          = var.argocd_labels
   destination_cluster    = var.destination_cluster
diff --git a/kind/main.tf b/kind/main.tf
index 0ba5dbd8..1d29690d 100644
--- a/kind/main.tf
+++ b/kind/main.tf
@@ -3,7 +3,6 @@ module "thanos" {
 
   cluster_name           = var.cluster_name
   base_domain            = var.base_domain
-  argocd_namespace       = var.argocd_namespace
   argocd_project         = var.argocd_project
   argocd_labels          = var.argocd_labels
   destination_cluster    = var.destination_cluster
diff --git a/main.tf b/main.tf
index f71dacd7..42ac8cac 100644
--- a/main.tf
+++ b/main.tf
@@ -7,10 +7,7 @@ resource "argocd_project" "this" {
 
   metadata {
     name      = var.destination_cluster != "in-cluster" ? "thanos-${var.destination_cluster}" : "thanos"
-    namespace = var.argocd_namespace
-    annotations = {
-      "devops-stack.io/argocd_namespace" = var.argocd_namespace
-    }
+    namespace = "argocd"
   }
 
   spec {
@@ -46,7 +43,7 @@ data "utils_deep_merge_yaml" "values" {
 resource "argocd_application" "this" {
   metadata {
     name      = var.destination_cluster != "in-cluster" ? "thanos-${var.destination_cluster}" : "thanos"
-    namespace = var.argocd_namespace
+    namespace = "argocd"
     labels = merge({
       "application" = "thanos"
       "cluster"     = var.destination_cluster
diff --git a/sks/main.tf b/sks/main.tf
index 0ba5dbd8..1d29690d 100644
--- a/sks/main.tf
+++ b/sks/main.tf
@@ -3,7 +3,6 @@ module "thanos" {
 
   cluster_name           = var.cluster_name
   base_domain            = var.base_domain
-  argocd_namespace       = var.argocd_namespace
   argocd_project         = var.argocd_project
   argocd_labels          = var.argocd_labels
   destination_cluster    = var.destination_cluster
diff --git a/variables.tf b/variables.tf
index e1c1ff2e..8bee88a2 100644
--- a/variables.tf
+++ b/variables.tf
@@ -12,12 +12,6 @@ variable "base_domain" {
   type        = string
 }
 
-variable "argocd_namespace" {
-  description = "Namespace used by Argo CD where the Application and AppProject resources should be created."
-  type        = string
-  default     = "argocd"
-}
-
 variable "argocd_project" {
   description = "Name of the Argo CD AppProject where the Application should be created. If not set, the Application will be created in a new AppProject only for this Application."
   type        = string