diff --git a/R/lib.R b/R/lib.R
index 77be524..9c0e882 100644
--- a/R/lib.R
+++ b/R/lib.R
@@ -229,7 +229,7 @@ fd_generate_data = function(fdObj, id) {
         data = fdObj$env[[id]]$data
         readr::write_csv(data, csv_file)
         status = "ok"
-        print(paste0("The csv file is saved to ", csv_file))
+        message(paste0("The csv file is saved to ", csv_file))
     }
     return(list(
         status = status,
@@ -252,7 +252,7 @@ fd_generate_pdf = function(fdObj, id) {
                units = canvas_options$units, 
                dpi = canvas_options$dpi)
         status = "ok"
-        print(paste0("The pdf file is saved to ", pdf_file))
+        message(paste0("The pdf file is saved to ", pdf_file))
     }
     return(list(
         status = status,
diff --git a/R/server.R b/R/server.R
index 975745c..4fba4f5 100644
--- a/R/server.R
+++ b/R/server.R
@@ -39,7 +39,7 @@ response_fd_download_data = function(fo, req) {
 }
 
 response_fd_download_pdf = function(fo, req) {
-    print("response_fd_download_pdf")
+    # print("response_fd_download_pdf")
     parsed_qeury = parse_url(req$QUERY_STRING)$query
     figure_id = parsed_qeury$id
     res = fd_generate_pdf(fo, figure_id)