diff --git a/static/index.html b/static/index.html
index 8447edd..1c4cffd 100644
--- a/static/index.html
+++ b/static/index.html
@@ -219,7 +219,7 @@
       <div class="from-control">
         <label for="address">Wallet Address</label>
         <input type="text" id="address" name="address" autocomplete="off" minlength="63"
-          placeholder="fuel100000... or 0x0000..." pattern="[a-z0-9]{63,66}" />
+          placeholder="fuel100000... or 0x0000..." pattern="[a-Z0-9]{63,66}" />
       </div>
       <p class="description">
         This is a <b class="bold">Test Ether</b> faucet running on the