diff --git a/oscar/README.md b/oscar/README.md
index 945b10e..50262d9 100644
--- a/oscar/README.md
+++ b/oscar/README.md
@@ -94,4 +94,5 @@ The following table lists the configurable parameters of the OSCAR chart and the
 | `volume.storageClassName`               | Storage Class used by the PVC                                                                                                                                                                         | `""`                                 |
 | `resources.requests.memory`             | Memory resource requests                                                                                                                                                                              | `512Mi`                              |
 | `resources.requests.cpu`                | CPU resource requests                                                                                                                                                                                 | `500m`                               |
+| `additionalConfig.allowedImagePrefix` | List of repository prefixes to restrict Docker images | `""` |
 
diff --git a/oscar/templates/oscar-additional-cm.yaml b/oscar/templates/oscar-additional-cm.yaml
new file mode 100644
index 0000000..34a8542
--- /dev/null
+++ b/oscar/templates/oscar-additional-cm.yaml
@@ -0,0 +1,14 @@
+{{- if ne .Values.additionalConfig.allowedImagePrefix "" }}
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: additional-oscar-config
+  namespace: oscar-svc
+data:
+  config.yaml: |
+    images:
+      allowed_prefixes: |-
+        {{- range .Values.additionalConfig.allowedImagePrefix }}
+        - {{ . | title | quote}}
+        {{- end }}
+{{- end }}
\ No newline at end of file
diff --git a/oscar/values.yaml b/oscar/values.yaml
index 2c10f86..996cf84 100644
--- a/oscar/values.yaml
+++ b/oscar/values.yaml
@@ -31,6 +31,10 @@ service:
   port: 8080
   nodePort: 30301
 
+# Additional OSCAR configuration
+additionalConfig:
+  allowedImagePrefix: ""
+  
 # Number of replicas to deploy
 replicas: 1