diff --git a/helm/node-normalization-web-server/Chart.yaml b/helm/node-normalization-web-server/Chart.yaml
index c2e72f3fd..8fe677722 100644
--- a/helm/node-normalization-web-server/Chart.yaml
+++ b/helm/node-normalization-web-server/Chart.yaml
@@ -15,12 +15,12 @@ type: application
 # This is the chart version. This version number should be incremented each time you make changes
 # to the chart and its templates, including the app version.
 # Versions are expected to follow Semantic Versioning (https://semver.org/)
-version: 0.4.1
+version: 0.4.2
 
 # This is the version number of the application being deployed. This version number should be
 # incremented each time you make changes to the application. Versions are not expected to
 # follow Semantic Versioning. They should reflect the version the application is using.
-# 
+#
 # NodeNorm versions are based on the version of the NodeNorm Docker image concatenated with the
 # Babel release date.
-appVersion: 2.3.26_2025sep1
+appVersion: 2.4.1_2025sep1
diff --git a/helm/node-normalization-web-server/ncats-images-meta.yaml b/helm/node-normalization-web-server/ncats-images-meta.yaml
index 7e06efac1..c167d0926 100644
--- a/helm/node-normalization-web-server/ncats-images-meta.yaml
+++ b/helm/node-normalization-web-server/ncats-images-meta.yaml
@@ -1,4 +1,4 @@
 nodeNormalization:
   image: ghcr.io/ncatstranslator/nodenormalization
-  version: v2.3.26
+  version: v2.4.1
 
diff --git a/helm/node-normalization-web-server/renci-dev-values-populated.yaml b/helm/node-normalization-web-server/renci-dev-values-populated.yaml
index dc9018e21..3956d9d2f 100644
Binary files a/helm/node-normalization-web-server/renci-dev-values-populated.yaml and b/helm/node-normalization-web-server/renci-dev-values-populated.yaml differ
diff --git a/helm/node-normalization-web-server/renci-exp-values-populated.yaml b/helm/node-normalization-web-server/renci-exp-values-populated.yaml
index d62ca4979..137edfa55 100644
Binary files a/helm/node-normalization-web-server/renci-exp-values-populated.yaml and b/helm/node-normalization-web-server/renci-exp-values-populated.yaml differ
diff --git a/helm/node-normalization-web-server/templates/web-server-deployment.yaml b/helm/node-normalization-web-server/templates/web-server-deployment.yaml
index d94ae0dad..4bc1fdbf6 100644
--- a/helm/node-normalization-web-server/templates/web-server-deployment.yaml
+++ b/helm/node-normalization-web-server/templates/web-server-deployment.yaml
@@ -46,6 +46,8 @@ spec:
               value: "{{ .Values.data.babelVersion }}"
             - name: "BABEL_VERSION_URL"
               value: "{{ .Values.data.babelVersionURL }}"
+            - name: "BIOLINK_MODEL_TAG"
+              value: "{{ .Values.data.biolinkModelTag }}"
             - name: "SERVER_ROOT"
               value: "{{ .Values.web.serverHostName }}"
             - name: "MATURITY_VALUE"
diff --git a/helm/node-normalization-web-server/values.yaml b/helm/node-normalization-web-server/values.yaml
index 97ce8241c..8d67ca772 100644
--- a/helm/node-normalization-web-server/values.yaml
+++ b/helm/node-normalization-web-server/values.yaml
@@ -8,12 +8,13 @@
 
 image:
   repository: ghcr.io/ncatstranslator/nodenormalization
-  tag: v2.3.26
+  tag: v2.4.1
   pullPolicy: Always
 
 data:
   babelVersion: "2025sep1"
   babelVersionURL: "https://github.com/ncatstranslator/Babel/blob/master/releases/2025sep1.md"
+  biolinkModelTag: "v4.2.6-rc5"
 
 web:
   port: 8080