diff --git a/.github/workflows/Makefile b/.github/workflows/Makefile
index 299e5e2f..7d291a86 100644
--- a/.github/workflows/Makefile
+++ b/.github/workflows/Makefile
@@ -1,4 +1,4 @@
-HELM_VERSION ?= v3.7.2
+HELM_VERSION ?= v4.0.0-beta.1
 KUSTOMIZE_VERSION ?= v5.4.3
 K8S_VERSION ?= v1.32.1
 MINIKUBE_VERSION ?= v1.31.1
diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 92f29ea8..982ae526 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -86,6 +86,12 @@ jobs:
             plugin-secrets-version: 4.6.5
             plugin-diff-version: 3.12.5
             extra-helmfile-flags: '--enable-live-output'
+          # Test with Helm v4 beta
+          - helm-version: v4.0.0-beta.1
+            kustomize-version: v5.4.3
+            plugin-secrets-version: 4.6.5
+            plugin-diff-version: 3.12.5
+            extra-helmfile-flags: ''
     steps:
       - uses: actions/checkout@v5
       - uses: actions/setup-go@v6
diff --git a/Dockerfile b/Dockerfile
index 2872032e..546d3ed1 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -30,7 +30,7 @@ ENV HELM_CONFIG_HOME="${HELM_CONFIG_HOME}"
 ARG HELM_DATA_HOME="${HOME}/.local/share/helm"
 ENV HELM_DATA_HOME="${HELM_DATA_HOME}"
 
-ARG HELM_VERSION="v3.19.0"
+ARG HELM_VERSION="v4.0.0-beta.1"
 ENV HELM_VERSION="${HELM_VERSION}"
 ARG HELM_LOCATION="https://get.helm.sh"
 ARG HELM_FILENAME="helm-${HELM_VERSION}-${TARGETOS}-${TARGETARCH}.tar.gz"
@@ -38,8 +38,8 @@ RUN set -x && \
     curl --retry 5 --retry-connrefused -LO "${HELM_LOCATION}/${HELM_FILENAME}" && \
     echo Verifying ${HELM_FILENAME}... && \
     case ${TARGETPLATFORM} in \
-    "linux/amd64")  HELM_SHA256="a7f81ce08007091b86d8bd696eb4d86b8d0f2e1b9f6c714be62f82f96a594496"  ;; \
-    "linux/arm64")  HELM_SHA256="440cf7add0aee27ebc93fada965523c1dc2e0ab340d4348da2215737fc0d76ad"  ;; \
+    "linux/amd64")  HELM_SHA256="7be0196d374ff121409d092d014b7759bc5e9419cda9ada7283dfbe4ff01fce8"  ;; \
+    "linux/arm64")  HELM_SHA256="48c0cfa5107bae86b733eab9150d3422944ff6638db63637e0a7ce6b69060088"  ;; \
     esac && \
     echo "${HELM_SHA256}  ${HELM_FILENAME}" | sha256sum -c && \
     echo Extracting ${HELM_FILENAME}... && \
diff --git a/pkg/app/init.go b/pkg/app/init.go
index 54fbb57b..21609d4d 100644
--- a/pkg/app/init.go
+++ b/pkg/app/init.go
@@ -19,7 +19,7 @@ import (
 const (
 	HelmRequiredVersion           = "v3.18.6"
 	HelmDiffRecommendedVersion    = "v3.13.0"
-	HelmRecommendedVersion        = "v3.19.0"
+	HelmRecommendedVersion        = "v4.0.0-beta.1"
 	HelmSecretsRecommendedVersion = "v4.6.5"
 	HelmGitRecommendedVersion     = "v1.3.0"
 	HelmS3RecommendedVersion      = "v0.16.3"
diff --git a/pkg/exectest/helm.go b/pkg/exectest/helm.go
index 9daaf0ec..5857d398 100644
--- a/pkg/exectest/helm.go
+++ b/pkg/exectest/helm.go
@@ -210,7 +210,7 @@ func (helm *Helm) IsHelm3() bool {
 	if helm.Version == nil {
 		return helm.Helm3
 	}
-	return helm.Version.Major() == 3
+	return helm.Version.Major() >= 3
 }
 
 func (helm *Helm) GetVersion() helmexec.Version {
diff --git a/pkg/helmexec/exec.go b/pkg/helmexec/exec.go
index fd185b71..37b5c3ae 100644
--- a/pkg/helmexec/exec.go
+++ b/pkg/helmexec/exec.go
@@ -647,7 +647,7 @@ func (helm *execer) write(w io.Writer, out []byte) {
 }
 
 func (helm *execer) IsHelm3() bool {
-	return helm.version.Major() == 3
+	return helm.version.Major() >= 3
 }
 
 func (helm *execer) GetVersion() Version {