diff --git a/lib/fluent/plugin/out_http.rb b/lib/fluent/plugin/out_http.rb
index a5de8701d8..f89736a144 100644
--- a/lib/fluent/plugin/out_http.rb
+++ b/lib/fluent/plugin/out_http.rb
@@ -215,7 +215,7 @@ def create_request(chunk, uri)
         req.basic_auth(@auth.username, @auth.password)
       end
       set_headers(req)
-      req.body = @json_array ? "[#{chunk.read.chop!}]" : chunk.read
+      req.body = @json_array ? "[#{chunk.read.chop}]" : chunk.read
       req
     end