diff --git a/README.md b/README.md
index cf0c2ac..a7d2acf 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,7 @@ All the algorithms are provably fair.
 ## Install
 
 ```shell
-go get github.com/pastc/vero
+go get github.com/pastc/vero/v2
 ```
 
 ## Features
diff --git a/crash.go b/crash.go
index efd4a2f..8a85543 100644
--- a/crash.go
+++ b/crash.go
@@ -4,7 +4,7 @@ import (
 	"math"
 	"strconv"
 
-	"github.com/pastc/vero/internal"
+	"github.com/pastc/vero/v2/internal"
 )
 
 // houseEdge i.e, percentage that the house gets
diff --git a/crash_test.go b/crash_test.go
index 3771e97..a30cf49 100644
--- a/crash_test.go
+++ b/crash_test.go
@@ -4,7 +4,7 @@ import (
 	"strconv"
 	"testing"
 
-	"github.com/pastc/vero/internal"
+	"github.com/pastc/vero/v2/internal"
 )
 
 func TestCrash(t *testing.T) {
diff --git a/csv.go b/csv.go
deleted file mode 100644
index 255e0e9..0000000
--- a/csv.go
+++ /dev/null
@@ -1,73 +0,0 @@
-package vero
-
-//import (
-//	"crypto/sha256"
-//	"encoding/csv"
-//	"fmt"
-//	"log"
-//	"os"
-//	"strconv"
-//)
-//
-//type Has struct {
-//	ID   int
-//	Hash string
-//}
-//
-////func (h Hash)
-//
-//func read(q int) []Has {
-//	file, err := os.Open("hash.csv")
-//	if err != nil {
-//		log.Fatal(err)
-//	}
-//	defer func(file *os.File) {
-//		err = file.Close()
-//		if err != nil {
-//			log.Fatal(err)
-//		}
-//	}(file)
-//	content, err := csv.NewReader(file).ReadAll()
-//	if err != nil {
-//		log.Fatal(err)
-//	}
-//
-//	var Hashes []Has
-//
-//	for i := 0; i <= q && i < len(content); i++ {
-//		fmt.Println(content[len(content)-i-1][0])
-//	}
-//
-//	return Hashes
-//}
-//
-//func generate(q int) {
-//	file, err := os.Create("hash.csv")
-//	if err != nil {
-//		log.Fatal(err)
-//	}
-//	defer func(file *os.File) {
-//		err = file.Close()
-//		if err != nil {
-//			log.Fatal(err)
-//		}
-//	}(file)
-//	writer := csv.NewWriter(file)
-//	defer writer.Flush()
-//
-//	secret := hash("SECRET")
-//	for i := 1; i <= q; i++ {
-//		err = writer.Write([]string{secret, strconv.Itoa(i)})
-//		if err != nil {
-//			log.Fatal(err)
-//		}
-//		secret = hash(secret)
-//	}
-//}
-//
-//func hash(s string) string {
-//	h := sha256.New()
-//	h.Write([]byte(s))
-//	bs := h.Sum(nil)
-//	return fmt.Sprintf("%x", bs)
-//}
diff --git a/dice.go b/dice.go
index 19b5ae7..794299f 100644
--- a/dice.go
+++ b/dice.go
@@ -4,7 +4,7 @@ import (
 	"math"
 	"strconv"
 
-	"github.com/pastc/vero/internal"
+	"github.com/pastc/vero/v2/internal"
 )
 
 // Dice generates a random integer from 0 to 9999
diff --git a/dice_test.go b/dice_test.go
index 8d6f8f2..3833c93 100644
--- a/dice_test.go
+++ b/dice_test.go
@@ -5,7 +5,7 @@ import (
 	"strconv"
 	"testing"
 
-	"github.com/pastc/vero/internal"
+	"github.com/pastc/vero/v2/internal"
 )
 
 func TestDice(t *testing.T) {
diff --git a/internal/math.go b/internal/math.go
deleted file mode 100644
index e92b44c..0000000
--- a/internal/math.go
+++ /dev/null
@@ -1,37 +0,0 @@
-package internal
-
-//func Factorial(n int) int {
-//	if n == 0 || n == 1 {
-//		return 1
-//	}
-//
-//	return n * Factorial(n-1)
-//}
-
-////Binomial
-////
-////n = Row number
-////
-////r = Column number
-//func Binomial(n, r int) int {
-//	if n < 0 || r < 0 {
-//		return 0
-//	}
-//	if n < r {
-//		return 0
-//	}
-//	// (n,k) = (n, n-k)
-//	if r > n/2 {
-//		r = n - r
-//	}
-//	b := 1
-//	for i := 1; i <= r; i++ {
-//		b = (n - r + i) * b / i
-//	}
-//	return b
-//}
-
-//// BinomialDistribution calculates the binomial distribution probability.
-//func BinomialDistribution(n, r int) float64 {
-//	return float64(Binomial(n, r)) * math.Pow(0.5, float64(n)) * 100
-//}
diff --git a/internal/util.go b/internal/util.go
index 1d208b9..00b5068 100644
--- a/internal/util.go
+++ b/internal/util.go
@@ -52,12 +52,6 @@ func Hash256(s string) string {
 	return string(h.Sum(nil))
 }
 
-//func Hash512(s string) string {
-//	h := sha512.New()
-//	h.Write([]byte(s))
-//	return string(h.Sum(nil))
-//}
-
 func Hmac256(key string, s string) string {
 	hmacHash := hmac.New(sha256.New, []byte(key))
 	hmacHash.Write([]byte(s))
diff --git a/plinko.go b/plinko.go
index 04865f0..fb62307 100644
--- a/plinko.go
+++ b/plinko.go
@@ -4,7 +4,7 @@ import (
 	"math"
 	"strconv"
 
-	"github.com/pastc/vero/internal"
+	"github.com/pastc/vero/v2/internal"
 )
 
 // Plinko generates the column number that the ball landed on
diff --git a/plinko_test.go b/plinko_test.go
index 3e671c8..52be933 100644
--- a/plinko_test.go
+++ b/plinko_test.go
@@ -5,7 +5,7 @@ import (
 	"strconv"
 	"testing"
 
-	"github.com/pastc/vero/internal"
+	"github.com/pastc/vero/v2/internal"
 )
 
 func TestPlinko(t *testing.T) {
diff --git a/roll.go b/roll.go
index d220c74..f8a84b5 100644
--- a/roll.go
+++ b/roll.go
@@ -3,7 +3,7 @@ package vero
 import (
 	"strconv"
 
-	"github.com/pastc/vero/internal"
+	"github.com/pastc/vero/v2/internal"
 )
 
 // maximum is the maximum value that can be rolled, counting from 0
diff --git a/roll_test.go b/roll_test.go
index 7f6b0f8..efac6c1 100644
--- a/roll_test.go
+++ b/roll_test.go
@@ -5,7 +5,7 @@ import (
 	"strconv"
 	"testing"
 
-	"github.com/pastc/vero/internal"
+	"github.com/pastc/vero/v2/internal"
 )
 
 func TestRoll(t *testing.T) {