diff --git a/cyberchef/Chart.yaml b/cyberchef/Chart.yaml
index 7d10e46..1900968 100644
--- a/cyberchef/Chart.yaml
+++ b/cyberchef/Chart.yaml
@@ -5,7 +5,7 @@ icon: https://raw.githubusercontent.com/gchq/CyberChef/master/src/web/static/ima
 
 type: application
 
-version: 8.0.0+up11.4.0
+version: 9.0.0+up11.4.0
 appVersion: "11.4.0"
 
 maintainers:
diff --git a/cyberchef/templates/_helpers.tpl b/cyberchef/templates/_helpers.tpl
index 8027859..6144be8 100644
--- a/cyberchef/templates/_helpers.tpl
+++ b/cyberchef/templates/_helpers.tpl
@@ -214,7 +214,8 @@ default probe needs no further context.
 {{- $defaults := dict
       "runAsNonRoot" true
       "runAsUser" 101
-      "runAsGroup" 101 -}}
+      "runAsGroup" 101
+      "seccompProfile" (dict "type" "RuntimeDefault") -}}
 {{- include "cyberchef.defaultedDict" (dict "defaults" $defaults "given" $given "path" "cyberchef.securityContext.pod") -}}
 {{- end -}}
 
diff --git a/cyberchef/values.yaml b/cyberchef/values.yaml
index deebe83..a8d8496 100644
--- a/cyberchef/values.yaml
+++ b/cyberchef/values.yaml
@@ -16,6 +16,15 @@ cyberchef:
       runAsNonRoot: true
       runAsUser: 101
       runAsGroup: 101
+      # RuntimeDefault applies the container runtime's default seccomp filter,
+      # which blocks the syscalls a normal workload never makes. It sits in the
+      # pod context on purpose: from here it covers every container in the pod
+      # including init containers, while a container-level seccompProfile would
+      # have to be repeated for each one (and silently missed on the next one
+      # added). A container that genuinely needs a different filter can still
+      # override it under securityContext.container, which wins over this value.
+      seccompProfile:
+        type: RuntimeDefault
     container:
       allowPrivilegeEscalation: false
       readOnlyRootFilesystem: true