diff --git a/conf/core/log4j2-default.properties b/conf/core/log4j2-default.properties
index 5983f8e33d51729c70cd3d685fe299aa13e8f27c..39f5f0ead11bb5ccfa9e39d3007d40ee8fa3077c 100644
--- a/conf/core/log4j2-default.properties
+++ b/conf/core/log4j2-default.properties
@@ -8,6 +8,10 @@ verbose = true
 property.LOG_DIR = log
 property.REQUEST_TIME_LOGGER_LEVEL = OFF
 
+# the root logger has level "WARN" but we want to log the GRPC traffic in INFO level:
+logger.grpc_response_log.name = org.caosdb.server.grpc.LoggingInterceptor
+logger.grpc_response_log.level = INFO
+
 ## appenders
 # stderr
 appender.stderr.type = Console