diff --git a/argocd/application-ollama.yaml b/argocd/application-ollama.yaml
index 9003d4a..69e90d1 100644
--- a/argocd/application-ollama.yaml
+++ b/argocd/application-ollama.yaml
@@ -14,6 +14,7 @@ spec:
     targetRevision: HEAD
   syncPolicy:
     automated:
+      prune: true
       selfHeal: true
     syncOptions:
     - CreateNamespace=true
diff --git a/ollama/ollama.yaml b/ollama/ollama.yaml
index a875106..2bf583d 100644
--- a/ollama/ollama.yaml
+++ b/ollama/ollama.yaml
@@ -8,6 +8,9 @@ metadata:
 apiVersion: v1
 kind: PersistentVolumeClaim
 metadata:
+  annotations:
+    # Never let ArgoCD prune this PVC: it holds the downloaded models (20Gi).
+    argocd.argoproj.io/sync-options: Prune=false
   name: ollama-models
   namespace: ollama
 spec: