diff --git a/proto/caosdb/entity/v1alpha1/main.proto b/proto/caosdb/entity/v1alpha1/main.proto
index 51307d2a792bea7321dabb9237775a1039b3d888..0210690914a2087a895b89983faf629d4db59282 100644
--- a/proto/caosdb/entity/v1alpha1/main.proto
+++ b/proto/caosdb/entity/v1alpha1/main.proto
@@ -22,6 +22,7 @@
 syntax                      = "proto3";
 option  java_multiple_files = true;
 option  java_package        = "org.caosdb.api.entity.v1alpha1";
+option  cc_enable_arenas    = true;
 package caosdb.entity.v1alpha1;
 
 // Entity messages codes.