Fix link URL of shields.io badges in README

Place URL to shields.io/category instead of empty one (which led to
missing Github page).

1 files changed, 3 insertions, 3 deletions

diff --git a/README.md b/README.md
index 6b8ce9ec..1811cee2 100644
--- a/README.md
+++ b/README.md
@@ -9,9 +9,9 @@
 [![LGTM Total Alerts](https://img.shields.io/lgtm/alerts/g/ivmai/bdwgc.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/ivmai/bdwgc/alerts)
 
 [![Hits-of-Code](https://hitsofcode.com/github/ivmai/bdwgc?branch=master)](https://hitsofcode.com/github/ivmai/bdwgc/view)
-[![Lines of code](https://img.shields.io/tokei/lines/github/ivmai/bdwgc)]()
-[![GitHub code size in bytes](https://img.shields.io/github/languages/code-size/ivmai/bdwgc)]()
-[![Github All Releases](https://img.shields.io/github/downloads/ivmai/bdwgc/total.svg)]()
+[![Lines of code](https://img.shields.io/tokei/lines/github/ivmai/bdwgc)](https://shields.io/category/size)
+[![GitHub code size in bytes](https://img.shields.io/github/languages/code-size/ivmai/bdwgc)](https://shields.io/category/size)
+[![Github All Releases](https://img.shields.io/github/downloads/ivmai/bdwgc/total.svg)](https://shields.io/category/downloads)
 
 This is version 8.1.0 (next release development) of a conservative garbage
 collector for C and C++.