diff --git a/example_bootstrap_from_file_test.go b/example_bootstrap_from_file_test.go
index 4e6d025..c63f169 100644
--- a/example_bootstrap_from_file_test.go
+++ b/example_bootstrap_from_file_test.go
@@ -2,7 +2,7 @@ package unleash_test
 
 import (
 	"fmt"
-	"io"
+	"io/ioutil"
 	"os"
 	"testing"
 	"time"
@@ -24,7 +24,7 @@ func Test_bootstrapFromFile(t *testing.T) {
 		Persist().
 		Reply(200)
 		// Read the file into a byte slice
-	byteValue, _ := io.ReadAll(demoReader)
+	byteValue, _ := ioutil.ReadAll(demoReader)
 	// Convert the byte slice to a string
 	jsonStr := string(byteValue)
 
diff --git a/unleash_test.go b/unleash_test.go
index e0def13..9d0cdbe 100644
--- a/unleash_test.go
+++ b/unleash_test.go
@@ -2,7 +2,7 @@ package unleash_test
 
 import (
 	"fmt"
-	"io"
+	"io/ioutil"
 	"os"
 	"testing"
 	"time"
@@ -21,7 +21,7 @@ func Test_withVariants(t *testing.T) {
 		Post("/client/register").
 		Reply(200)
 		// Read the file into a byte slice
-	byteValue, _ := io.ReadAll(demoReader)
+	byteValue, _ := ioutil.ReadAll(demoReader)
 	// Convert the byte slice to a string
 	jsonStr := string(byteValue)
 
@@ -71,7 +71,7 @@ func Test_withVariantsAndANonExistingStrategyName(t *testing.T) {
 		Post("/client/register").
 		Reply(200)
 
-	byteValue, _ := io.ReadAll(demoReader)
+	byteValue, _ := ioutil.ReadAll(demoReader)
 	// Convert the byte slice to a string
 	jsonStr := string(byteValue)