diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6648e9fa..6cde26f7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,7 @@
 # Changelog
 
 ## In Development
+* Add option to define config.js for st2web (#165) (by @moonrail)
 
 ## v0.50.0
 * Drop Helm `v2` support and fully migrate to Helm `v3` (#163)
diff --git a/templates/configmaps_st2web.yaml b/templates/configmaps_st2web.yaml
new file mode 100644
index 00000000..c861a812
--- /dev/null
+++ b/templates/configmaps_st2web.yaml
@@ -0,0 +1,22 @@
+{{- if .Values.st2web.config }}
+---
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: {{ .Release.Name }}-st2web-config
+  annotations:
+    description: Custom StackStorm Web config which will override defaults
+  labels:
+    app: st2
+    tier: backend
+    vendor: stackstorm
+    support: {{ template "supportMethod" . }}
+    chart: {{ .Chart.Name }}-{{ .Chart.Version }}
+    release: {{ .Release.Name }}
+    heritage: {{ .Release.Service }}
+data:
+  # User-defined st2web config with custom settings to replace default config.js
+  # See https://github.com/StackStorm/st2web#connecting-to-st2-server for more info
+  st2web.config.js: |
+{{ .Values.st2web.config | indent 4 }}
+{{- end }}
diff --git a/templates/deployments.yaml b/templates/deployments.yaml
index c1aed4bc..996b37df 100644
--- a/templates/deployments.yaml
+++ b/templates/deployments.yaml
@@ -409,13 +409,27 @@ spec:
         - configMapRef:
             name: {{ .Release.Name }}-st2-urls
             optional: true
+    {{- if .Values.st2web.config }}
+        volumeMounts:
+          - name: st2web-config-vol
+            mountPath: /opt/stackstorm/static/webui/config.js
+            subPath: st2web.config.js
+    {{- else }}
         volumeMounts: []
+    {{- end }}
         resources:
 {{ toYaml .Values.st2web.resources | indent 10 }}
     {{- if .Values.st2web.serviceAccount.attach }}
       serviceAccountName: {{ template "stackstorm-ha.serviceAccountName" . }}
     {{- end }}
+    {{- if .Values.st2web.config }}
+      volumes:
+        - name: st2web-config-vol
+          configMap:
+            name: {{ .Release.Name }}-st2web-config
+    {{- else }}
       volumes: []
+    {{- end }}
     {{- with .Values.st2web.nodeSelector }}
       nodeSelector:
 {{ toYaml . | indent 8 }}
diff --git a/values.yaml b/values.yaml
index 9f493f2c..0c22ecd1 100644
--- a/values.yaml
+++ b/values.yaml
@@ -253,6 +253,10 @@ st2web:
   affinity: {}
   serviceAccount:
     attach: false
+  # User-defined st2web config with custom settings to replace default config.js
+  # See https://github.com/StackStorm/st2web#connecting-to-st2-server for more info
+  # config: |
+  #  // see https://github.com/StackStorm/st2web/blob/master/config.js
 # https://docs.stackstorm.com/reference/ha.html#st2auth
 # Multiple st2auth processes can be behind a load balancer in an active-active configuration.
 st2auth: