diff --git a/bitnami/logstash/CHANGELOG.md b/bitnami/logstash/CHANGELOG.md
index 6454d7effe7bb9..2a21dc9047ed76 100644
--- a/bitnami/logstash/CHANGELOG.md
+++ b/bitnami/logstash/CHANGELOG.md
@@ -1,8 +1,12 @@
 # Changelog
 
-## 6.3.3 (2024-09-06)
+## 6.3.4 (2024-09-06)
 
-* [bitnami/logstash] Release 6.3.3 ([#29250](https://github.com/bitnami/charts/pull/29250))
+* [bitnami/logstash] fix #29129 missing protocol in networkPolicy ([#29277](https://github.com/bitnami/charts/pull/29277))
+
+## <small>6.3.3 (2024-09-06)</small>
+
+* [bitnami/logstash] Release 6.3.3 (#29250) ([8a7a49b](https://github.com/bitnami/charts/commit/8a7a49b1f3070436c4bb0cf7074c827b16116852)), closes [#29250](https://github.com/bitnami/charts/issues/29250)
 
 ## <small>6.3.2 (2024-08-08)</small>
 
diff --git a/bitnami/logstash/Chart.yaml b/bitnami/logstash/Chart.yaml
index fc376caaa09b92..17ed019c57b0ba 100644
--- a/bitnami/logstash/Chart.yaml
+++ b/bitnami/logstash/Chart.yaml
@@ -30,4 +30,4 @@ maintainers:
 name: logstash
 sources:
 - https://github.com/bitnami/charts/tree/main/bitnami/logstash
-version: 6.3.3
+version: 6.3.4
diff --git a/bitnami/logstash/templates/networkpolicy.yaml b/bitnami/logstash/templates/networkpolicy.yaml
index 99f4400dc806a8..f6feddee0fd013 100644
--- a/bitnami/logstash/templates/networkpolicy.yaml
+++ b/bitnami/logstash/templates/networkpolicy.yaml
@@ -39,9 +39,11 @@ spec:
     - ports:
         {{- range .Values.containerPorts }}
         - port: {{ .containerPort }}
+          protocol: {{ default "TCP" .protocol }}
         {{- end }}
         {{- range .Values.service.ports }}
         - port: {{ .port }}
+          protocol: {{ default "TCP" .protocol }}
         {{- end }}
       to:
         - podSelector:
@@ -54,9 +56,11 @@ spec:
     - ports:
         {{- range .Values.containerPorts }}
         - port: {{ .containerPort }}
+          protocol: {{ default "TCP" .protocol }}
         {{- end }}
         {{- range .Values.extraContainerPorts }}
         - port: {{ . }}
+          protocol: {{ default "TCP" .protocol }}
         {{- end }}
         {{- if .Values.enableMonitoringAPI }}
         - port: {{ .Values.monitoringAPIPort }}