diff --git a/data_embed/index.html b/data_embed/index.html
index dbd34b0..3108aec 100644
--- a/data_embed/index.html
+++ b/data_embed/index.html
@@ -125,6 +125,7 @@
                                             class="form-control"
                                             placeholder="N0CALL-10"
                                             required=""
+                                            oninput="this.value = this.value.toUpperCase();"
                                         />
                                     </div>
                                     <div class="col-12 mt-3">