diff --git a/helm/helm-chart-package.bzl b/helm/helm-chart-package.bzl
index ac4065f..b653a96 100644
--- a/helm/helm-chart-package.bzl
+++ b/helm/helm-chart-package.bzl
@@ -82,6 +82,10 @@ def _helm_chart_impl(ctx):
         # extract docker image info from make variable or from rule attribute
         image_tag = get_make_value_or_default(ctx, ctx.attr.image_tag)
 
+    if ctx.attr.image_digest:
+        digest_path = ctx.attr.image_digest
+        inputs = inputs + [ctx.file.image, ctx.attr.image_digest]
+
     deps = ctx.attr.chart_deps or []
 
     # copy generated charts by other rules into temporal chart_root/charts directory (treated as a helm dependency)
@@ -170,6 +174,7 @@ helm_chart = rule(
     attrs = {
         "srcs": attr.label_list(allow_files = True, mandatory = True),
         "image": attr.label(allow_single_file = True, mandatory = False),
+        "image_digest": attr.label(allow_single_file = True, mandatory = False),
         "image_tag": attr.string(mandatory = False),
         "package_name": attr.string(mandatory = True),
         "helm_chart_version": attr.string(mandatory = False, default = "1.0.0"),