diff --git a/chartvalidator/Dockerfile b/chartvalidator/Dockerfile
index 1889932..5cd5d39 100644
--- a/chartvalidator/Dockerfile
+++ b/chartvalidator/Dockerfile
@@ -12,13 +12,17 @@ FROM alpine:3.22
 RUN apk add --no-cache curl bash
 
 # Install python3 and pip
-RUN apk add --no-cache python3 py3-pip openssl
+RUN apk add --no-cache python3 py3-pip openssl git
 
 # Install Helm
-RUN curl -fsSL -o get_helm.sh https://raw.githubusercontent.com/helm/helm/master/scripts/get-helm-3
+RUN curl -fsSL -o get_helm.sh https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3
+
 RUN chmod 700 get_helm.sh
 RUN ./get_helm.sh
 
+# Install helm unittest
+RUN helm plugin install https://github.com/helm-unittest/helm-unittest.git
+
 # Install kustomize
 RUN curl -s "https://raw.githubusercontent.com/kubernetes-sigs/kustomize/master/hack/install_kustomize.sh" -o install_kustomize.sh