diff --git a/script/helm/garage/templates/configmap.yaml b/script/helm/garage/templates/configmap.yaml
index 280861e4..4fc3e152 100644
--- a/script/helm/garage/templates/configmap.yaml
+++ b/script/helm/garage/templates/configmap.yaml
@@ -13,7 +13,7 @@ data:
 
     db_engine = "{{ .Values.garage.dbEngine }}"
 
-    block_size = {{ .Values.garage.blockSize }}
+    block_size = "{{ .Values.garage.blockSize }}"
 
     replication_factor = {{ .Values.garage.replicationFactor }}
     consistency_mode = "{{ .Values.garage.consistencyMode }}"