diff --git a/faces-chart/templates/color.yaml b/faces-chart/templates/color.yaml
index a91d436..97bd29f 100644
--- a/faces-chart/templates/color.yaml
+++ b/faces-chart/templates/color.yaml
@@ -37,6 +37,8 @@ spec:
         env:
         - name: FACES_SERVICE
           value: "color"
+        - name: USER_HEADER_NAME
+          value: {{ .Values.authHeader | quote }}
         {{- if .Values.color.color }}
         - name: COLOR
           value: {{ .Values.color.color }}
diff --git a/faces-chart/templates/color2.yaml b/faces-chart/templates/color2.yaml
index 95c83ea..79f92d0 100644
--- a/faces-chart/templates/color2.yaml
+++ b/faces-chart/templates/color2.yaml
@@ -38,6 +38,8 @@ spec:
         env:
         - name: FACES_SERVICE
           value: "color"
+        - name: USER_HEADER_NAME
+          value: {{ .Values.authHeader | quote }}
         {{- if .Values.color2.color }}
         - name: COLOR
           value: {{ .Values.color2.color }}
diff --git a/faces-chart/templates/face.yaml b/faces-chart/templates/face.yaml
index 87772ae..7fa2dd0 100644
--- a/faces-chart/templates/face.yaml
+++ b/faces-chart/templates/face.yaml
@@ -37,6 +37,8 @@ spec:
         env:
         - name: FACES_SERVICE
           value: "face"
+        - name: USER_HEADER_NAME
+          value: {{ .Values.authHeader | quote }}
         {{- include "partials.face-errorFraction" . }}
         {{- include "partials.face-delayBuckets" . }}
         resources:
diff --git a/faces-chart/templates/faces-gui.yaml b/faces-chart/templates/faces-gui.yaml
index 5697208..e0c8bb7 100644
--- a/faces-chart/templates/faces-gui.yaml
+++ b/faces-chart/templates/faces-gui.yaml
@@ -31,6 +31,9 @@ spec:
       - name: faces-gui
         image: {{ include "partials.gui-image" . }}
         imagePullPolicy: {{ include "partials.gui-imagePullPolicy" . }}
+        env:
+        - name: USER_HEADER_NAME
+          value: {{ .Values.authHeader | quote }}
         ports:
         - name: http
           containerPort: 8000
diff --git a/faces-chart/templates/smiley.yaml b/faces-chart/templates/smiley.yaml
index ae5b66e..17d1db9 100644
--- a/faces-chart/templates/smiley.yaml
+++ b/faces-chart/templates/smiley.yaml
@@ -37,6 +37,8 @@ spec:
         env:
         - name: FACES_SERVICE
           value: "smiley"
+        - name: USER_HEADER_NAME
+          value: {{ .Values.authHeader | quote }}
         {{- if .Values.smiley.smiley }}
         - name: SMILEY
           value: {{ .Values.smiley.smiley }}
diff --git a/faces-chart/templates/smiley2.yaml b/faces-chart/templates/smiley2.yaml
index f61477c..4fe3804 100644
--- a/faces-chart/templates/smiley2.yaml
+++ b/faces-chart/templates/smiley2.yaml
@@ -38,6 +38,8 @@ spec:
         env:
         - name: FACES_SERVICE
           value: "smiley"
+        - name: USER_HEADER_NAME
+          value: {{ .Values.authHeader | quote }}
         {{- if .Values.smiley2.smiley }}
         - name: SMILEY
           value: {{ .Values.smiley2.smiley }}
diff --git a/faces-chart/values.yaml b/faces-chart/values.yaml
index f589cbd..19a8034 100644
--- a/faces-chart/values.yaml
+++ b/faces-chart/values.yaml
@@ -9,6 +9,9 @@ defaultImageTag: ""             # If not set, uses the appVersion
 # Default imagePullPolicy. This is used only if not set in the sections below.
 defaultImagePullPolicy: IfNotPresent
 
+# User auth header.
+authHeader: "X-Faces-User"
+
 gui:
   image: ""                     # If set, overrides the imageName/imageTag pair
   imageName: ghcr.io/buoyantio/faces-gui