diff --git a/bip39-standalone.html b/bip39-standalone.html
index 9b3c4f1..dcd6ffc 100644
--- a/bip39-standalone.html
+++ b/bip39-standalone.html
@@ -13364,6 +13364,26 @@ bitcoin.networks.dash = {
   wif: 0xcc,
 };
 
+bitcoin.networks.namecoin = {
+  bip32: {
+    public: 0x0488b21e,
+    private: 0x0488ade4
+  },
+  pubKeyHash: 0x34,
+  //scriptHash: 0x10,
+  wif: 0x80,
+};
+
+bitcoin.networks.peercoin = {
+  bip32: {
+    public: 0x0488b21e,
+    private: 0x0488ade4
+  },
+  pubKeyHash: 0x37,
+  //scriptHash: 0x10,
+  wif: 0xb7,
+};
+
 </script>
         <script>// Select components from sjcl to suit the crypto operations bip39 requires.
 
@@ -15432,6 +15452,20 @@ var Mnemonic = function(language) {
                 DOM.bip44coin.val(5);
             },
         },
+        {
+            name: "Namecoin",
+            onSelect: function() {
+                network = bitcoin.networks.namecoin;
+                DOM.bip44coin.val(7);
+            },
+        },
+        {
+            name: "Peercoin",
+            onSelect: function() {
+                network = bitcoin.networks.peercoin;
+                DOM.bip44coin.val(6);
+            },
+        },
     ]
 
     init();
diff --git a/src/js/bitcoinjs-extensions.js b/src/js/bitcoinjs-extensions.js
index 9f11de8..b02d79f 100644
--- a/src/js/bitcoinjs-extensions.js
+++ b/src/js/bitcoinjs-extensions.js
@@ -45,3 +45,23 @@ bitcoin.networks.dash = {
   wif: 0xcc,
 };
 
+bitcoin.networks.namecoin = {
+  bip32: {
+    public: 0x0488b21e,
+    private: 0x0488ade4
+  },
+  pubKeyHash: 0x34,
+  //scriptHash: 0x10,
+  wif: 0x80,
+};
+
+bitcoin.networks.peercoin = {
+  bip32: {
+    public: 0x0488b21e,
+    private: 0x0488ade4
+  },
+  pubKeyHash: 0x37,
+  //scriptHash: 0x10,
+  wif: 0xb7,
+};
+
diff --git a/src/js/index.js b/src/js/index.js
index 5cd09b6..69f5eab 100644
--- a/src/js/index.js
+++ b/src/js/index.js
@@ -587,6 +587,20 @@
                 DOM.bip44coin.val(5);
             },
         },
+        {
+            name: "Namecoin",
+            onSelect: function() {
+                network = bitcoin.networks.namecoin;
+                DOM.bip44coin.val(7);
+            },
+        },
+        {
+            name: "Peercoin",
+            onSelect: function() {
+                network = bitcoin.networks.peercoin;
+                DOM.bip44coin.val(6);
+            },
+        },
     ]
 
     init();