The json parser comes from protobuf.
diff --git a/test/cpp/qps/BUILD b/test/cpp/qps/BUILD
index de46847..c6a1fd2 100644
--- a/test/cpp/qps/BUILD
+++ b/test/cpp/qps/BUILD
@@ -36,6 +36,7 @@
     srcs = ["parse_json.cc"],
     hdrs = ["parse_json.h"],
     deps = ["//:grpc++"],
+    external_deps = ["protobuf"],
 )
 
 grpc_cc_library(