diff --git a/src/index.html b/src/index.html
index a53a20b..916ec81 100644
--- a/src/index.html
+++ b/src/index.html
@@ -108,7 +108,7 @@
                                         <select class="mnemonic-length form-control">
                                             <option value="raw" selected>Use Raw Entropy (3 words per 32 bits)</option>
                                             <option value="12">12 <span>Words</span></option>
-                                            <option value="15">15 <span>Words</option>
+                                            <option value="15">15 <span>Words</span></option>
                                             <option value="18">18 <span>Words</span></option>
                                             <option value="21">21 <span>Words</span></option>
                                             <option value="24">24 <span>Words</span></option>