diff --git a/package.json b/package.json
index a791069..b34da1c 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
     "name": "debreviator",
-    "version": "0.0.6",
+    "version": "0.0.7",
     "description": "Creates meaning by undoing your abbreviation.",
     "author": "Florine W. Dekker",
     "browser": "dist/bundle.js",
diff --git a/src/main/index.html b/src/main/index.html
index 8ac7b4d..d77ca8c 100644
--- a/src/main/index.html
+++ b/src/main/index.html
@@ -59,11 +59,13 @@
                 <input id="abbreviation" type="text" autofocus />
                 <small id="abbreviation-hint" data-hint-for="abbreviation"></small>
 
-                <button id="debreviate" type="button">Debreviate</button>
+                <button id="debreviate" type="submit">Debreviate</button>
             </form>
 
             <label for="debreviations">Debreviations</label>
             <textarea id="debreviations" readonly></textarea>
+
+            <p id="abbreviation-error"></p>
         </section>
         <footer id="footer"></footer>
     </div>
diff --git a/src/main/js/main.js b/src/main/js/main.js
index 60481f7..cd2c568 100644
--- a/src/main/js/main.js
+++ b/src/main/js/main.js
@@ -28,7 +28,7 @@ doAfterLoad(() => {
 
     const debreviate = () => {
         clearFormValidity(debreviateForm);
-        const abbreviation = abbreviationInput.value.trim();
+        const abbreviation = abbreviationInput.value.trim().toLowerCase();
         if (abbreviation === "") {
             showInputInvalid(abbreviationInput, "Abbreviation should be non-empty.");
             return;