diff --git a/addons/web/static/src/webclient/select2.scss b/addons/web/static/src/webclient/select2.scss
index b30999437b0..24cfa494cb3 100644
--- a/addons/web/static/src/webclient/select2.scss
+++ b/addons/web/static/src/webclient/select2.scss
@@ -6,12 +6,12 @@
 
 .select2-container .select2-choice {
     background-color: $dropdown-bg;
-    background-image: var(--Select2Choice-background-image, linear-gradient(to top, #eee 0%, #fff 50%));
-    color: var(--Select2Choice-color, #444);
+    background-image: var(--select2-background-image, linear-gradient(to top, #eee 0%, #fff 50%));
+    color: var(--select2-color, #444);
 }
 
 .select2-container.select2-drop-above .select2-choice {
-    background-image: var(--Select2Choice__DropAbove-background-image, linear-gradient(to top, #eee 0%, #fff 90%));
+    background-image: var(--select2__dropAbove-background-image, linear-gradient(to top, #eee 0%, #fff 90%));
 }
 
 .select2-drop-mask {
@@ -24,45 +24,42 @@
 }
 
 .select2-container:not(.select2-dropdown-open) .select2-choice .select2-arrow {
-    background: var(--Select2__Arrow-background, linear-gradient(to top, #ccc 0%, #eee 60%));
+    background: var(--select2__arrow-background, linear-gradient(to top, #ccc 0%, #eee 60%));
 }
 
 .select2-search input,
 html[dir="rtl"] .select2-search input,
 .select2-search input.select2-active {
-    background-color: var(--Select2__SearchInput-background-color, #fff);
+    background-color: var(--select2__searchInput-background-color, #fff);
     background-repeat: no-repeat;
 }
 
 .select2-search input {
-    background-image: var(--Select2__SearchInput-background-image, url('/web/static/lib/select2/select2.png'), linear-gradient(to bottom, #fff 85%, #eee 99%) 0 0);
+    background-image: var(--select2__searchInput-background-image, url('/web/static/lib/select2/select2.png'), linear-gradient(to bottom, #fff 85%, #eee 99%) 0 0);
     background-position: 100% -22px;
 }
 
 html[dir="rtl"] .select2-search input {
-    background-image: var(--Select2__SearchInput-background-image, url('/web/static/lib/select2/select2.png'), linear-gradient(to bottom, #fff 85%, #eee 99%) 0 0);
+    background-image: var(--select2__searchInput-background-image, url('/web/static/lib/select2/select2.png'), linear-gradient(to bottom, #fff 85%, #eee 99%) 0 0);
     background-position: -37px -22px;
 }
 
 .select2-search input.select2-active {
-    background-image: var(--Select2__SearchInput--active-background-image, url('/web/static/lib/select2/select2-spinner.gif'), linear-gradient(to bottom, #fff 85%, #eee 99%) 0 0);
+    background-image: var(--select2__searchInput-background-image--active, url('/web/static/lib/select2/select2-spinner.gif'), linear-gradient(to bottom, #fff 85%, #eee 99%) 0 0);
     background-position: 100%;
 }
 
 .select2-dropdown-open .select2-choice {
-    box-shadow: var(--Select2Choice-box-shadow, 0 1px 0 #fff inset);
+    box-shadow: var(--select2-box-shadow, 0 1px 0 #fff inset);
 }
 
 .select2-results .select2-highlighted {
     background: $o-brand-primary;
-    color: var(--Select2__ResultsHighlighted-color, #fff);
+    color: var(--select2__resultsHighlighted-color, #fff);
 }
 
 .select2-results {
-    .select2-no-results,
-    .select2-results .select2-searching,
-    .select2-results .select2-ajax-error,
-    .select2-results .select2-selection-limit {
+    .select2-no-results, .select2-searching, .select2-ajax-error, .select2-selection-limit {
         background: $dropdown-bg;
         color: $o-main-text-color;
     }
@@ -76,7 +73,7 @@ html[dir="rtl"] .select2-search input {
 .select2-container .select2-choice .select2-arrow,
 html[dir="rtl"] .select2-container .select2-choice .select2-arrow,
 .select2-search input {
-    border-color: var(--Select2-border-color, #aaa);
+    border-color: var(--select2-border-color, #aaa);
 }
 
 .select2-drop-active,
@@ -86,5 +83,5 @@ html[dir="rtl"] .select2-container .select2-choice .select2-arrow,
 .select2-dropdown-open.select2-drop-above .select2-choice,
 .select2-dropdown-open.select2-drop-above .select2-choices,
 .form-control.select2-container.select2-dropdown-open {
-    border-color: var(--Select2Active-border-color, #5897fb);
+    border-color: var(--select2-border-color--active, #5897fb);
 }