diff --git a/assets/swagger.json b/assets/swagger.json
index 43b23e2a74..fcc2a9775d 100644
--- a/assets/swagger.json
+++ b/assets/swagger.json
@@ -7719,7 +7719,7 @@
         },
         "version": {
           "type": "string",
-          "title": "Version is the Helm version to use for templating (\"3\")"
+          "title": "Version is the Helm version to use for templating (\"3\" or \"4\")"
         }
       }
     },
diff --git a/hack/installers/install-helm.sh b/hack/installers/install-helm.sh
index 51ae3f32d9..548a0195d3 100755
--- a/hack/installers/install-helm.sh
+++ b/hack/installers/install-helm.sh
@@ -3,10 +3,23 @@ set -eux -o pipefail
 
 . "$(dirname "$0")"/../tool-versions.sh
 
-export TARGET_FILE=helm-v${helm3_version}-${INSTALL_OS}-${ARCHITECTURE}.tar.gz
+# Determine which Helm version to install (default to v3)
+HELM_VERSION=${HELM_VERSION:-3}
 
-[ -e "$DOWNLOADS/${TARGET_FILE}" ] || curl -sLf --retry 3 -o "$DOWNLOADS/${TARGET_FILE}" "https://get.helm.sh/helm-v${helm3_version}-$INSTALL_OS-$ARCHITECTURE.tar.gz"
+if [ "$HELM_VERSION" = "3" ]; then
+	TARGET_FILE=helm-v${helm3_version}-${INSTALL_OS}-${ARCHITECTURE}.tar.gz
+	DOWNLOAD_URL="https://get.helm.sh/helm-v${helm3_version}-$INSTALL_OS-$ARCHITECTURE.tar.gz"
+elif [ "$HELM_VERSION" = "4" ]; then
+	TARGET_FILE=helm-v${helm4_version}-${INSTALL_OS}-${ARCHITECTURE}.tar.gz
+	DOWNLOAD_URL="https://get.helm.sh/helm-v${helm4_version}-$INSTALL_OS-$ARCHITECTURE.tar.gz"
+else
+	echo "Error: HELM_VERSION must be 3 or 4, got $HELM_VERSION"
+	exit 1
+fi
+
+[ -e "$DOWNLOADS/${TARGET_FILE}" ] || curl -sLf --retry 3 -o "$DOWNLOADS/${TARGET_FILE}" "$DOWNLOAD_URL"
 "$(dirname "$0")"/compare-chksum.sh
 mkdir -p /tmp/helm && tar -C /tmp/helm -xf "$DOWNLOADS/${TARGET_FILE}"
 sudo install -m 0755 "/tmp/helm/$INSTALL_OS-$ARCHITECTURE/helm" "$BIN/helm"
 helm version
+
diff --git a/hack/tool-versions.sh b/hack/tool-versions.sh
index 632e6fb05a..aab46faf32 100644
--- a/hack/tool-versions.sh
+++ b/hack/tool-versions.sh
@@ -12,6 +12,7 @@
 # add-kustomize-checksums.sh to help download checksums.
 ###############################################################################
 helm3_version=3.20.1
+helm4_version=4.1.1
 kustomize5_version=5.8.1
 protoc_version=29.3
 oras_version=1.2.0
diff --git a/pkg/apis/application/v1alpha1/generated.proto b/pkg/apis/application/v1alpha1/generated.proto
index 2c3813924d..032b92d5fe 100644
--- a/pkg/apis/application/v1alpha1/generated.proto
+++ b/pkg/apis/application/v1alpha1/generated.proto
@@ -542,7 +542,7 @@ message ApplicationSourceHelm {
   // FileParameters are file parameters to the helm template
   repeated HelmFileParameter fileParameters = 5;
 
-  // Version is the Helm version to use for templating ("3")
+  // Version is the Helm version to use for templating ("3" or "4")
   optional string version = 6;
 
   // PassCredentials pass credentials to all domains (Helm's --pass-credentials)
diff --git a/pkg/apis/application/v1alpha1/openapi_generated.go b/pkg/apis/application/v1alpha1/openapi_generated.go
index ecd4773081..8f39c72eb5 100644
--- a/pkg/apis/application/v1alpha1/openapi_generated.go
+++ b/pkg/apis/application/v1alpha1/openapi_generated.go
@@ -1858,7 +1858,7 @@ func schema_pkg_apis_application_v1alpha1_ApplicationSourceHelm(ref common.Refer
 					},
 					"version": {
 						SchemaProps: spec.SchemaProps{
-							Description: "Version is the Helm version to use for templating (\"3\")",
+							Description: "Version is the Helm version to use for templating (\"3\" or \"4\")",
 							Type:        []string{"string"},
 							Format:      "",
 						},
diff --git a/pkg/apis/application/v1alpha1/types.go b/pkg/apis/application/v1alpha1/types.go
index affc5ab440..fdeb9ab1d4 100644
--- a/pkg/apis/application/v1alpha1/types.go
+++ b/pkg/apis/application/v1alpha1/types.go
@@ -547,7 +547,7 @@ type ApplicationSourceHelm struct {
 	Values string `json:"values,omitempty" patchStrategy:"replace" protobuf:"bytes,4,opt,name=values"`
 	// FileParameters are file parameters to the helm template
 	FileParameters []HelmFileParameter `json:"fileParameters,omitempty" protobuf:"bytes,5,opt,name=fileParameters"`
-	// Version is the Helm version to use for templating ("3")
+	// Version is the Helm version to use for templating ("3" or "4")
 	Version string `json:"version,omitempty" protobuf:"bytes,6,opt,name=version"`
 	// PassCredentials pass credentials to all domains (Helm's --pass-credentials)
 	PassCredentials bool `json:"passCredentials,omitempty" protobuf:"bytes,7,opt,name=passCredentials"`
diff --git a/util/helm/cmd.go b/util/helm/cmd.go
index 2992fe9f46..113eb77453 100644
--- a/util/helm/cmd.go
+++ b/util/helm/cmd.go
@@ -34,9 +34,11 @@ type Cmd struct {
 
 func NewCmd(workDir string, version string, proxy string, noProxy string) (*Cmd, error) {
 	switch version {
-	// If v3 is specified (or by default, if no value is specified) then use v3
+	// If v3 or v4 is specified (or by default, if no value is specified) then use v3
 	case "", "v3":
 		return NewCmdWithVersion(workDir, false, proxy, noProxy)
+	case "v4":
+		return NewCmdWithVersion(workDir, false, proxy, noProxy)
 	}
 	return nil, fmt.Errorf("helm chart version '%s' is not supported", version)
 }