diff --git a/traefik/templates/_podtemplate.tpl b/traefik/templates/_podtemplate.tpl
index 147f2e46a..f383b77a5 100644
--- a/traefik/templates/_podtemplate.tpl
+++ b/traefik/templates/_podtemplate.tpl
@@ -108,7 +108,7 @@
               {{- fail "ERROR: All hostPort must match their respective containerPort when `hostNetwork` is enabled" }}
             {{- end }}
           {{- end }}
-        - name: {{ $name | quote }}
+        - name: {{ $name | lower | quote }}
           containerPort: {{ default $config.port $config.containerPort }}
           {{- if $config.hostPort }}
           hostPort: {{ $config.hostPort }}
diff --git a/traefik/templates/_service.tpl b/traefik/templates/_service.tpl
index 27d5bc477..c0e7cacef 100644
--- a/traefik/templates/_service.tpl
+++ b/traefik/templates/_service.tpl
@@ -50,7 +50,8 @@
 {{- end }}
 
 {{- define "traefik.service-ports" }}
- {{- range $name, $config := .ports }}
+ {{- range $portName, $config := .ports }}
+  {{- $name := $portName | lower -}}
   {{- if (index (default dict $config.expose) $.serviceName) }}
   {{- $port := default $config.port $config.exposedPort }}
   {{- if empty $port }}
diff --git a/traefik/tests/ports-config_test.yaml b/traefik/tests/ports-config_test.yaml
index 9f18635f2..353a059e7 100644
--- a/traefik/tests/ports-config_test.yaml
+++ b/traefik/tests/ports-config_test.yaml
@@ -357,3 +357,26 @@ tests:
     asserts:
       - failedTemplate:
           errorMessage: "ERROR: Cannot create ssh port on Service without .port or .exposedPort"
+  - it: should support uppercase letters in entrypoint names
+    set:
+      ports:
+        UPPERCASE:
+          port: 443
+          expose:
+            default: true
+    asserts:
+      - contains:
+          path: spec.template.spec.containers[0].ports
+          content:
+            name: uppercase
+            containerPort: 443
+            protocol: TCP
+        template: deployment.yaml
+      - contains:
+          path: spec.ports
+          content:
+            name: uppercase
+            port: 443
+            protocol: TCP
+            targetPort: uppercase
+        template: service.yaml