diff --git a/bip39-standalone.html b/bip39-standalone.html
index 0045240..1767c4a 100644
--- a/bip39-standalone.html
+++ b/bip39-standalone.html
@@ -70,7 +70,7 @@
                             <label for="strength" class="col-sm-2 control-label">Number of words</label>
                             <div class="col-sm-10">
                                 <div class="input-group">
-                                    <input type="number" class="strength form-control" id="strength" value="12">
+                                    <input type="number" class="strength form-control" id="strength" value="15">
                                     <span class="input-group-btn">
                                         <button class="btn generate">Generate Random Mnemonic</button>
                                     </span>
diff --git a/src/index.html b/src/index.html
index 59ef1a0..34b4248 100644
--- a/src/index.html
+++ b/src/index.html
@@ -66,7 +66,7 @@
                             <label for="strength" class="col-sm-2 control-label">Number of words</label>
                             <div class="col-sm-10">
                                 <div class="input-group">
-                                    <input type="number" class="strength form-control" id="strength" value="12">
+                                    <input type="number" class="strength form-control" id="strength" value="15">
                                     <span class="input-group-btn">
                                         <button class="btn generate">Generate Random Mnemonic</button>
                                     </span>