diff --git a/kubernetes/linera-validator/templates/proxy.yaml b/kubernetes/linera-validator/templates/proxy.yaml
index a5d81d1f4433..22ab7eb41f3b 100644
--- a/kubernetes/linera-validator/templates/proxy.yaml
+++ b/kubernetes/linera-validator/templates/proxy.yaml
@@ -130,6 +130,15 @@ spec:
                 --storage scylladb:tcp:scylla-client.scylla.svc.cluster.local:9042 \
                 --storage-replication-factor {{ .Values.storageReplicationFactor | quote }} \
                 --id "$ORDINAL" \
+                {{- if .Values.blobCacheSize }}
+                --blob-cache-size {{ .Values.blobCacheSize }} \
+                {{- end }}
+                {{- if .Values.certificateCacheSize }}
+                --certificate-cache-size {{ .Values.certificateCacheSize }} \
+                {{- end }}
+                {{- if .Values.confirmedBlockCacheSize }}
+                --confirmed-block-cache-size {{ .Values.confirmedBlockCacheSize }} \
+                {{- end }}
                 /config/server.json
           env:
             - name: RUST_LOG
diff --git a/kubernetes/linera-validator/templates/shards.yaml b/kubernetes/linera-validator/templates/shards.yaml
index 49ecd987f6bc..370e4f9c5665 100644
--- a/kubernetes/linera-validator/templates/shards.yaml
+++ b/kubernetes/linera-validator/templates/shards.yaml
@@ -140,6 +140,15 @@ spec:
                 {{- if .Values.notificationQueueSize }}
                 --notification-queue-size {{ .Values.notificationQueueSize }}
                 {{- end }}
+                {{- if .Values.blobCacheSize }}
+                --blob-cache-size {{ .Values.blobCacheSize }}
+                {{- end }}
+                {{- if .Values.certificateCacheSize }}
+                --certificate-cache-size {{ .Values.certificateCacheSize }}
+                {{- end }}
+                {{- if .Values.confirmedBlockCacheSize }}
+                --confirmed-block-cache-size {{ .Values.confirmedBlockCacheSize }}
+                {{- end }}
           env:
             - name: RUST_LOG
               value: {{ .Values.logLevel }}
diff --git a/kubernetes/linera-validator/values.yaml b/kubernetes/linera-validator/values.yaml
index ea35cf6cda0d..e812d899c0ad 100644
--- a/kubernetes/linera-validator/values.yaml
+++ b/kubernetes/linera-validator/values.yaml
@@ -62,6 +62,11 @@ crossChainQueueSize: ""
 # Set to empty string to use default
 notificationQueueSize: ""
 
+# Application-level cache sizes (default in binary is 1000)
+blobCacheSize: ""
+certificateCacheSize: ""
+confirmedBlockCacheSize: ""
+
 # ============================================================================
 # Storage Configuration
 # ============================================================================