diff --git a/listener/internal/api/validation/GetActiveValidators.go b/listener/internal/api/validation/GetActiveValidators.go
index c6831c9..e448dca 100644
--- a/listener/internal/api/validation/GetActiveValidators.go
+++ b/listener/internal/api/validation/GetActiveValidators.go
@@ -35,6 +35,7 @@ func GetActiveValidators(requestsDecoded []types.SignatureRequestDecoded, beacon
 		}
 
 		// serialize the request body to JSON
+		// see https://ethereum.github.io/beacon-APIs/#/Beacon/postStateValidators
 		jsonData, err := json.Marshal(struct {
 			Ids      []string `json:"ids"`
 			Statuses []string `json:"statuses"`
@@ -48,7 +49,8 @@ func GetActiveValidators(requestsDecoded []types.SignatureRequestDecoded, beacon
 		}
 
 		// configure HTTP client with timeout
-		client := &http.Client{Timeout: 10 * time.Second}
+		// TODO: test timeout
+		client := &http.Client{Timeout: 50 * time.Second}
 		url := fmt.Sprintf("%s/eth/v1/beacon/states/head/validators", url)
 		resp, err := client.Post(url, "application/json", bytes.NewBuffer(jsonData))
 		if err != nil {
@@ -70,6 +72,7 @@ func GetActiveValidators(requestsDecoded []types.SignatureRequestDecoded, beacon
 		}
 
 		// assuming the server returns a list of active validators in the format expected
+		// TODO: get data type an unmarshall to that type
 		if err := json.Unmarshal(responseData, &activeValidators); err != nil {
 			fmt.Printf("error unmarshaling response data: %v\n", err)
 			continue
diff --git a/listener/internal/api/validation/GetActiveValidators_test.go b/listener/internal/api/validation/GetActiveValidators_test.go
index 8486a14..c7416bb 100644
--- a/listener/internal/api/validation/GetActiveValidators_test.go
+++ b/listener/internal/api/validation/GetActiveValidators_test.go
@@ -9,7 +9,7 @@ import (
 func TestGetActiveValidators(t *testing.T) {
 	// Setup the input data
 	beaconNodeUrls := map[string]string{
-		"holesky": "https://holesky.infura.io/v3/e6c920580178424bbdf6dde266bfb5bd",
+		"holesky": "https://test.53650f79ab75c6ff.dyndns.dappnode.io/",
 	}
 
 	requestsDecoded := []types.SignatureRequestDecoded{