diff --git a/core/src/main/java/org/bitcoinj/kits/BIP47AppKit.java b/core/src/main/java/org/bitcoinj/kits/BIP47AppKit.java
index 15b3697e485..a393018bcde 100644
--- a/core/src/main/java/org/bitcoinj/kits/BIP47AppKit.java
+++ b/core/src/main/java/org/bitcoinj/kits/BIP47AppKit.java
@@ -183,7 +183,7 @@ private void grabNotificationAddressUtxos(final String cashAddr) {
             @Override
             public void run() {
                 ArrayList<String> txids = new ArrayList<String>();
-                String apiUrl = "http://rest.bitcoin.com/v2/address/utxo/" + cashAddr;
+                String apiUrl = "https://rest.bitcoin.com/v2/address/utxo/" + cashAddr;
                 JSONObject utxosJson = getJSONObject(apiUrl);
                 try {
                     JSONArray utxos = utxosJson.getJSONArray("utxos");
@@ -204,7 +204,7 @@ public void run() {
     }
 
     private void grabTransactionAndProcessNotificationTransaction(String txid) {
-        String url = "http://rest.bitcoin.com/v2/rawtransactions/getRawTransaction/" + txid + "?verbose=true";
+        String url = "https://rest.bitcoin.com/v2/rawtransactions/getRawTransaction/" + txid + "?verbose=true";
 
         JSONObject txJson = getJSONObject(url);
         if(txJson != null) {
diff --git a/core/src/main/java/org/bitcoinj/kits/SlpBIP47AppKit.java b/core/src/main/java/org/bitcoinj/kits/SlpBIP47AppKit.java
index f04270ca8c2..c485b8938c8 100644
--- a/core/src/main/java/org/bitcoinj/kits/SlpBIP47AppKit.java
+++ b/core/src/main/java/org/bitcoinj/kits/SlpBIP47AppKit.java
@@ -543,7 +543,7 @@ private void grabNotificationAddressUtxos(final String cashAddr) {
             @Override
             public void run() {
                 ArrayList<String> txids = new ArrayList<String>();
-                String apiUrl = "http://rest.bitcoin.com/v2/address/utxo/" + cashAddr;
+                String apiUrl = "https://rest.bitcoin.com/v2/address/utxo/" + cashAddr;
                 JSONObject utxosJson = getJSONObject(apiUrl);
                 try {
                     JSONArray utxos = utxosJson.getJSONArray("utxos");
@@ -564,7 +564,7 @@ public void run() {
     }
 
     private void grabTransactionAndProcessNotificationTransaction(String txid) {
-        String url = "http://rest.bitcoin.com/v2/rawtransactions/getRawTransaction/" + txid + "?verbose=true";
+        String url = "https://rest.bitcoin.com/v2/rawtransactions/getRawTransaction/" + txid + "?verbose=true";
 
         JSONObject txJson = getJSONObject(url);
         if(txJson != null) {