diff --git a/lib/fluent/plugin/storage_local.rb b/lib/fluent/plugin/storage_local.rb
index d6107efbb1..9fa88dfcb7 100644
--- a/lib/fluent/plugin/storage_local.rb
+++ b/lib/fluent/plugin/storage_local.rb
@@ -133,7 +133,7 @@ def save
         tmp_path = @path + '.tmp'
         begin
           json_string = Yajl::Encoder.encode(@store, pretty: @pretty_print)
-          open(tmp_path, 'w:utf-8', @mode){ |io| io.write json_string }
+          open(tmp_path, 'w:utf-8', @mode) { |io| io.write json_string; io.fsync }
           File.rename(tmp_path, @path)
         rescue => e
           log.error "failed to save data for plugin storage to file", path: @path, tmp: tmp_path, error: e