diff --git a/Makefile b/Makefile
index 1b28db99e3..4c2ad47508 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 # Image URL to use all building/pushing image targets
 
 # renovate: datasource=github-tags depName=kubernetes-sigs/kustomize
-KUSTOMIZE_VERSION?=v5.4.2
+KUSTOMIZE_VERSION?=v5.4.3
 CHART_APPVERSION ?= v2.0.0 # x-release-please-version
 
 # renovate: datasource=docker depName=cytopia/yamllint
diff --git a/keptn-cert-manager/Makefile b/keptn-cert-manager/Makefile
index 21f4d2596b..0cdc5c2b26 100644
--- a/keptn-cert-manager/Makefile
+++ b/keptn-cert-manager/Makefile
@@ -120,7 +120,7 @@ ENVTEST ?= $(LOCALBIN)/setup-envtest
 ## Tool Versions
 
 # renovate: datasource=github-tags depName=kubernetes-sigs/kustomize
-KUSTOMIZE_VERSION?=v5.4.2
+KUSTOMIZE_VERSION?=v5.4.3
 # renovate: datasource=github-releases depName=kubernetes-sigs/controller-tools
 CONTROLLER_TOOLS_VERSION?=v0.15.0
 
diff --git a/lifecycle-operator/Makefile b/lifecycle-operator/Makefile
index 6ee415af04..e42ad2ccf9 100644
--- a/lifecycle-operator/Makefile
+++ b/lifecycle-operator/Makefile
@@ -25,7 +25,7 @@ ENVTEST_K8S_VERSION=1.27.1
 
 ## Tool Versions
 # renovate: datasource=github-tags depName=kubernetes-sigs/kustomize
-KUSTOMIZE_VERSION?=v5.4.2
+KUSTOMIZE_VERSION?=v5.4.3
 # renovate: datasource=github-releases depName=kubernetes-sigs/controller-tools
 CONTROLLER_TOOLS_VERSION?=v0.15.0
 
diff --git a/metrics-operator/Makefile b/metrics-operator/Makefile
index 9d70a0d6d6..cd94690b9f 100644
--- a/metrics-operator/Makefile
+++ b/metrics-operator/Makefile
@@ -25,7 +25,7 @@ ENVTEST_K8S_VERSION=1.27.1
 
 ## Tool Versions
 # renovate: datasource=github-tags depName=kubernetes-sigs/kustomize
-KUSTOMIZE_VERSION?=v5.4.2
+KUSTOMIZE_VERSION?=v5.4.3
 # renovate: datasource=github-releases depName=kubernetes-sigs/controller-tools
 CONTROLLER_TOOLS_VERSION?=v0.15.0
 
diff --git a/scheduler/Makefile b/scheduler/Makefile
index d0673426c4..7ac0fac38b 100644
--- a/scheduler/Makefile
+++ b/scheduler/Makefile
@@ -46,7 +46,7 @@ $(LOCALBIN):
 
 ## Tool Versions
 # renovate: datasource=github-tags depName=kubernetes-sigs/kustomize
-KUSTOMIZE_VERSION ?= v5.4.2
+KUSTOMIZE_VERSION ?= v5.4.3
 
 ## Tool Binaries
 KUSTOMIZE ?= $(LOCALBIN)/kustomize