diff --git a/admin-ui/src/main/resources/META-INF/resources/admin/partials/realm-tokens.html b/admin-ui/src/main/resources/META-INF/resources/admin/partials/realm-tokens.html
index 91ea2d3..57a15d0 100755
--- a/admin-ui/src/main/resources/META-INF/resources/admin/partials/realm-tokens.html
+++ b/admin-ui/src/main/resources/META-INF/resources/admin/partials/realm-tokens.html
@@ -26,7 +26,7 @@
<div class="form-group input-select">
<label for="tokenLifespan">Token lifespan</label>
<div class="input-group">
- <input type="number" data-ng-model="realm.tokenLifespan" id="tokenLifespan" name="tokenLifespan" class="tiny">
+ <input type="number" required min="1" max="31536000" data-ng-model="realm.tokenLifespan" id="tokenLifespan" name="tokenLifespan" class="tiny">
<div class="select-rcue">
<select name="tokenLifespanUnit" data-ng-model="realm.tokenLifespanUnit" >
<option data-ng-selected="!realm.tokenLifespanUnit">Seconds</option>
@@ -40,7 +40,7 @@
<div class="form-group input-select">
<label for="accessCodeLifespan">Access code lifespan</label>
<div class="input-group">
- <input type="number" data-ng-model="realm.accessCodeLifespan" id="accessCodeLifespan" name="accessCodeLifespan" class="tiny">
+ <input type="number" required min="1" max="31536000" data-ng-model="realm.accessCodeLifespan" id="accessCodeLifespan" name="accessCodeLifespan" class="tiny">
<div class="select-rcue">
<select name="accessCodeLifespanUnit" data-ng-model="realm.accessCodeLifespanUnit">
<option data-ng-selected="!realm.accessCodeLifespanUnit">Seconds</option>
@@ -54,7 +54,7 @@
<div class="form-group input-select">
<label for="accessCodeLifespanUserAction" class="two-lines">Access code user action lifespan</label>
<div class="input-group">
- <input type="number" data-ng-model="realm.accessCodeLifespanUserAction" id="accessCodeLifespanUserAction" name="accessCodeLifespanUserAction" class="tiny">
+ <input type="number" required min="1" max="31536000" data-ng-model="realm.accessCodeLifespanUserAction" id="accessCodeLifespanUserAction" name="accessCodeLifespanUserAction" class="tiny">
<div class="select-rcue">
<select name="accessCodeLifespanUserActionUnit" data-ng-model="realm.accessCodeLifespanUserActionUnit">
<option data-ng-selected="!realm.accessCodeLifespanUserActionUnit">Seconds</option>
