diff --git a/.github/workflows/helm-ci.yaml b/.github/workflows/helm-ci.yaml
index 0b1e019..77222e1 100644
--- a/.github/workflows/helm-ci.yaml
+++ b/.github/workflows/helm-ci.yaml
@@ -19,10 +19,10 @@ jobs:
       - name: Set up Helm
         uses: azure/setup-helm@v3
         with:
-          version: v3.13.3
+          version: v3.15.0
 
       - name: Install helm-unittest plugin
-        run: helm plugin install https://github.com/helm-unittest/helm-unittest
+        run: helm plugin install https://github.com/helm-unittest/helm-unittest --version v1.0.0
 
       - name: Lint Helm chart
         run: helm lint charts/iap
diff --git a/charts/iap/values.yaml b/charts/iap/values.yaml
index 6acfb53..c30e595 100644
--- a/charts/iap/values.yaml
+++ b/charts/iap/values.yaml
@@ -637,7 +637,7 @@ env:
   # ITENTIAL_WEBSERVER_HTTPS_CERT: "/etc/ssl/certs/platform/server.crt"
 
   # The set of allowed SSL/TLS protocol versions.
-  # ITENTIAL_WEBSERVER_HTTPS_SECURE_PROTOCOL: "TLSv1_2_method"
+  # ITENTIAL_WEBSERVER_HTTPS_SECURE_PROTOCOL: "TLS_method"
 
   # The allowed SSL/TLS cipher suite.
   # ITENTIAL_WEBSERVER_HTTPS_CIPHERS: "ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA256:ECDHE-RSA-AES256-SHA384:DHE-RSA-AES256-SHA384:ECDHE-RSA-AES256-SHA256:DHE-RSA-AES256-SHA256:HIGH:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!SRP:!CAMELLIA"