diff --git a/go.mod b/go.mod
index b25b2f51e5..79fb8243cf 100644
--- a/go.mod
+++ b/go.mod
@@ -3,6 +3,7 @@ module codeforces-go
 go 1.17
 
 require (
+	github.com/EndlessCheng/codeforces-go v0.0.0-00010101000000-000000000000
 	github.com/emirpasic/gods v1.12.0
 	github.com/levigross/grequests v0.0.0-20190908174114-253788527a1a
 	github.com/skratchdot/open-golang v0.0.0-20200116055534-eef842397966
@@ -12,12 +13,13 @@ require (
 )
 
 require (
-	github.com/blend/go-sdk v1.20210918.2 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0 // indirect
 	github.com/google/go-querystring v1.0.0 // indirect
+	github.com/kr/pretty v0.1.0 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	golang.org/x/image v0.0.0-20210628002857-a66eb6448b8d // indirect
-	gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 // indirect
 	gopkg.in/yaml.v3 v3.0.0-20200615113413-eeeca48fe776 // indirect
 )
+
+replace github.com/EndlessCheng/codeforces-go => ./