diff --git a/admin/static/js/app.js b/admin/static/js/app.js
index 9eb08d49..fb1fd593 100644
--- a/admin/static/js/app.js
+++ b/admin/static/js/app.js
@@ -593,11 +593,13 @@ angular.module("FICApp")
     })
 
     .controller("PKIController", function($scope, $rootScope, Certificate, CACertificate, Team, $location, $http) {
-	var ts = Date.now() - Date.now() % 86400000;
+        var ts = Date.now() - Date.now() % 86400000;
 	var d = new Date(ts);
-	$scope.notBefore = d.toISOString();
 	var f = new Date(ts + 3 * 86400000);
-	$scope.notAfter = f.toISOString();
+        $scope.newca = {
+	    notAfter: f.toISOString(),
+	    notBefore: d.toISOString(),
+	};
 
 	$scope.teams = Team.query();
 	$scope.certificates = Certificate.query();
@@ -636,12 +638,15 @@ angular.module("FICApp")
 	};
 
 	$scope.generateCA = function() {
-	    $http.post("/api/ca/new", {"notbefore": $scope.notBefore, "notafter": $scope.notAfter}).then(function() {
+	    $http.post("/api/ca/new", $scope.newca).then(function() {
 		$scope.ca = CACertificate.get();
 	    }, function(response) {
 		$rootScope.newBox('danger', 'An error occurs when generating CA:', response.data.errmsg);
 	    });
 	};
+        $scope.renewCA = function() {
+	    $scope.ca = {};
+        };
 
 	$scope.generateCert = function() {
 	    $http.post("/api/certs").then(function() {
diff --git a/admin/static/views/pki.html b/admin/static/views/pki.html
index 84477eb3..deb4b373 100644
--- a/admin/static/views/pki.html
+++ b/admin/static/views/pki.html
@@ -111,6 +111,7 @@
   <span class="badge badge-success" ng-if="ca.version">Générée</span>
   <span class="badge badge-danger" ng-if="!ca.version">Introuvable</span>
   <button type="button" ng-click="generateCA()" class="float-right btn btn-sm btn-primary" ng-if="!ca.version"><span class="glyphicon glyphicon-certificate" aria-hidden="true"></span> Générer</button>
+  <button type="button" ng-click="renewCA()" class="float-right btn btn-sm btn-primary" ng-if="ca.version"><span class="glyphicon glyphicon-certificate" aria-hidden="true"></span> Regénérer</button>
 </h2>
 
 <div class="alert alert-info" ng-if="!ca.version">
@@ -119,13 +120,13 @@
   <div class="form-group row">
     <label for="CAnotBefore" class="col-sm-3 col-form-label">Début de validité</label>
     <div class="col-sm-9">
-      <input type="text" class="form-control form-control-sm" id="CAnotBefore" ng-model="notBefore">
+      <input type="text" class="form-control form-control-sm" id="CAnotBefore" ng-model="newca.notBefore">
     </div>
   </div>
   <div class="form-group row">
     <label for="CAnotAfter" class="col-sm-3 col-form-label">Fin de validité</label>
     <div class="col-sm-9">
-      <input type="text" class="form-control form-control-sm" id="CAnotAfter" ng-model="notAfter">
+      <input type="text" class="form-control form-control-sm" id="CAnotAfter" ng-model="newca.notAfter">
     </div>
   </div>
 </div>