diff --git a/apps/files/css/files.css b/apps/files/css/files.css
index d20ab102ba..9433de6f4e 100644
--- a/apps/files/css/files.css
+++ b/apps/files/css/files.css
@@ -68,23 +68,23 @@
 
 /* icons for sidebar */
 .nav-icon-files {
-	background-image: url('../img/folder.svg');
+	background-image: url('../img/folder.svg?v=1');
 }
 .nav-icon-favorites {
-	background-image: url('../img/star.svg');
+	background-image: url('../img/star.svg?v=1');
 }
 .nav-icon-sharingin,
 .nav-icon-sharingout {
-	background-image: url('../img/share.svg');
+	background-image: url('../img/share.svg?v=1');
 }
 .nav-icon-sharinglinks {
-	background-image: url('../img/public.svg');
+	background-image: url('../img/public.svg?v=1');
 }
 .nav-icon-extstoragemounts {
-	background-image: url('../img/external.svg');
+	background-image: url('../img/external.svg?v=1');
 }
 .nav-icon-trashbin {
-	background-image: url('../img/delete.svg');
+	background-image: url('../img/delete.svg?v=1');
 }
 
 #app-navigation .nav-files a.nav-icon-files {
diff --git a/core/css/header.css b/core/css/header.css
index 58e30cdd95..f3f5276c2a 100644
--- a/core/css/header.css
+++ b/core/css/header.css
@@ -68,7 +68,7 @@
 }
 
 #header .logo {
-	background-image: url(../img/logo-icon.svg);
+	background-image: url('../img/logo-icon.svg?v=1');
 	background-repeat: no-repeat;
 	background-size: 175px;
 	background-position: center 30px;
@@ -80,7 +80,7 @@
 #header .logo-icon {
 	/* display logo so appname can be shown next to it */
 	display: inline-block;
-	background-image: url('../img/logo-icon.svg');
+	background-image: url('../img/logo-icon.svg?v=1');
 	background-repeat: no-repeat;
 	width: 62px;
 	height: 34px;
diff --git a/core/css/styles.css b/core/css/styles.css
index b048e6ce46..5ed2238321 100644
--- a/core/css/styles.css
+++ b/core/css/styles.css
@@ -26,7 +26,7 @@ body {
 #body-login {
 	text-align: center;
 	background-color: #0082c9;
-	background-image: url('../img/background.jpg');
+	background-image: url('../img/background.jpg?v=1');
 	background-position: 50% 50%;
 	background-repeat: no-repeat;
 	background-size: cover;
@@ -88,7 +88,7 @@ body {
 	font-size: 1.2em;
 	padding: 3px;
 	padding-left: 25px;
-	background: transparent url('../img/actions/search-white.svg') no-repeat 6px center;
+	background: transparent url('../img/actions/search-white.svg?v=1') no-repeat 6px center;
 	color: #fff;
 	border: 0;
 	border-radius: 3px;
@@ -465,7 +465,7 @@ html.ie8 #body-login form input[type="checkbox"] {
 	position: absolute !important;
 	height: 20px;
 	width: 24px;
-	background-image: url('../img/actions/toggle.svg');
+	background-image: url('../img/actions/toggle.svg?v=1');
 	background-repeat: no-repeat;
 	background-position: center;
 	-ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=30)";
@@ -760,15 +760,15 @@ a.bookmarklet { background-color:#ddd; border:1px solid #ccc; padding:5px;paddin
 .exception{color:#000;}
 .exception textarea{width:95%;height:200px;background:#ffe;border:0;}
 
-.ui-icon-circle-triangle-e{ background-image:url('../img/actions/play-next.svg'); }
-.ui-icon-circle-triangle-w{ background-image:url('../img/actions/play-previous.svg'); }
+.ui-icon-circle-triangle-e{ background-image:url('../img/actions/play-next.svg?v=1'); }
+.ui-icon-circle-triangle-w{ background-image:url('../img/actions/play-previous.svg?v=1'); }
 
 .ui-datepicker-prev,.ui-datepicker-next{ border:1px solid #ddd; background:#fff; }
 
 /* ---- DIALOGS ---- */
 #oc-dialog-filepicker-content .dirtree {width:92%; overflow:hidden; }
 #oc-dialog-filepicker-content .dirtree .home {
-	background-image:url('../img/places/home.svg');
+	background-image:url('../img/places/home.svg?v=1');
 	background-repeat:no-repeat;
 	background-position: left center;
 	width: 30px;
@@ -808,8 +808,8 @@ a.bookmarklet { background-color:#ddd; border:1px solid #ccc; padding:5px;paddin
 .ui-dialog {position:fixed !important;}
 span.ui-icon {float: left; margin: 3px 7px 30px 0;}
 
-.loading { background: url('../img/loading.gif') no-repeat center; cursor: wait; }
-.loading-small { background: url('../img/loading-small.gif') no-repeat center; cursor: wait; }
+.loading { background: url('../img/loading.gif?v=1') no-repeat center; cursor: wait; }
+.loading-small { background: url('../img/loading-small.gif?v=1') no-repeat center; cursor: wait; }
 .move2trash { /* decrease spinner size */
 	width: 16px;
 	height: 16px;
@@ -853,7 +853,7 @@ span.ui-icon {float: left; margin: 3px 7px 30px 0;}
 }
 .popup.topright { top:7em; right:1em; }
 .popup.bottomleft { bottom:1em; left:33em; }
-.popup .close { position:absolute; top:0.2em; right:0.2em; height:20px; width:20px; background:url('../img/actions/close.svg') no-repeat center; }
+.popup .close { position:absolute; top:0.2em; right:0.2em; height:20px; width:20px; background:url('../img/actions/close.svg?v=1') no-repeat center; }
 .popup h2 { font-size:20px; }
 .arrow { border-bottom:10px solid white; border-left:10px solid transparent; border-right:10px solid transparent; display:block; height:0; position:absolute; width:0; z-index:201; }
 .arrow.left { left:-13px; bottom:1.2em; -webkit-transform:rotate(270deg); -ms-transform:rotate(270deg); transform:rotate(270deg); }
@@ -865,7 +865,7 @@ span.ui-icon {float: left; margin: 3px 7px 30px 0;}
 div.crumb {
 	float: left;
 	display: block;
-	background: url('../img/breadcrumb.svg') no-repeat right center;
+	background: url('../img/breadcrumb.svg?v=1') no-repeat right center;
 	height: 44px;
 	background-size: auto 24px;
 }