diff --git a/README.md b/README.md
new file mode 100644
index 0000000..3920277
--- /dev/null
+++ b/README.md
@@ -0,0 +1,5 @@
+# `sets`
+
+[![Go Report Card](https://goreportcard.com/badge/pkg.icikowski.pl/sets)](https://goreportcard.com/report/pkg.icikowski.pl/sets)
+
+Sets and useful functions for working with them.
diff --git a/package.go b/package.go
index 96fabac..c3a757a 100644
--- a/package.go
+++ b/package.go
@@ -1,4 +1,4 @@
 /*
-Sets-related types & functions
+Sets and useful functions for working with them.
 */
 package sets