diff --git a/app/assets/javascripts/super_sidebar/components/menu_section.vue b/app/assets/javascripts/super_sidebar/components/menu_section.vue
index 5bf1d710f05659b6251336a50fb9347e41c24cbb..1ed117c0017a95944f6d650b0c8cc31f892b8742 100644
--- a/app/assets/javascripts/super_sidebar/components/menu_section.vue
+++ b/app/assets/javascripts/super_sidebar/components/menu_section.vue
@@ -113,7 +113,7 @@ export default {
   <component :is="tag">
     <button
       :id="`menu-section-button-${itemId}`"
-      class="super-sidebar-nav-item gl-relative gl-mb-1 gl-flex gl-w-full gl-appearance-none gl-items-center gl-gap-3 gl-rounded-base gl-border-0 gl-bg-transparent gl-px-3 gl-py-2 gl-text-left gl-font-semibold !gl-text-default !gl-no-underline focus:gl-focus"
+      class="super-sidebar-nav-item gl-relative gl-mb-1 gl-flex gl-w-full gl-appearance-none gl-items-center gl-gap-3 gl-rounded-lg gl-border-0 gl-bg-transparent gl-px-3 gl-py-2 gl-text-left gl-font-semibold !gl-text-default !gl-no-underline focus:gl-focus"
       :class="computedLinkClasses"
       data-testid="menu-section-button"
       :data-qa-section-name="item.title"
diff --git a/app/assets/javascripts/super_sidebar/components/nav_item.vue b/app/assets/javascripts/super_sidebar/components/nav_item.vue
index 934c28dae7bea76f374983c525b458222ca3b20e..038df1de946f82f075d578dfd21ba7a057f14db9 100644
--- a/app/assets/javascripts/super_sidebar/components/nav_item.vue
+++ b/app/assets/javascripts/super_sidebar/components/nav_item.vue
@@ -149,7 +149,7 @@ export default {
         'gl-px-2 gl-mx-2 gl-leading-normal': this.isSubitem,
         'gl-px-3': !this.isSubitem,
         '!gl-pl-5 gl-rounded-small': this.isFlyout,
-        'gl-rounded-base': !this.isFlyout,
+        'gl-rounded-lg': !this.isFlyout,
         [this.item.link_classes]: this.item.link_classes,
         ...this.linkClasses,
       };
diff --git a/app/assets/stylesheets/framework/buttons.scss b/app/assets/stylesheets/framework/buttons.scss
index 1bd41c0d2b9f43071ce05ed84c5d0cd4900799da..8035ca5684854c34b8b9389998225de3a1a5402d 100644
--- a/app/assets/stylesheets/framework/buttons.scss
+++ b/app/assets/stylesheets/framework/buttons.scss
@@ -1,5 +1,5 @@
 @mixin btn-default {
-  border-radius: $gl-border-radius-base;
+  border-radius: $gl-border-radius-large;
   font-size: $gl-font-size;
   font-weight: $gl-font-weight-normal;
   padding: $gl-vert-padding $gl-btn-padding;
diff --git a/app/assets/stylesheets/framework/forms.scss b/app/assets/stylesheets/framework/forms.scss
index 91e8c6ca6ca438e36e0e78fba7b98399475aaea8..7812f05e268b0ea086f423c12e9a0f04ba5c90ce 100644
--- a/app/assets/stylesheets/framework/forms.scss
+++ b/app/assets/stylesheets/framework/forms.scss
@@ -98,7 +98,7 @@ label {
   @include box-shadow(none);
   background: var(--gl-control-background-color-default);
   @apply gl-text-default;
-  border-radius: $gl-border-radius-base;
+  @apply gl-rounded-lg;
   padding: $gl-vert-padding $gl-input-padding;
 
   &.input-short {
diff --git a/package.json b/package.json
index 92e6b0356f31d660d557f655e24675291c8581be..fd127050613b454d8258768bcb7cedb8ce85ed9d 100644
--- a/package.json
+++ b/package.json
@@ -67,7 +67,7 @@
     "@gitlab/fonts": "^1.3.1",
     "@gitlab/query-language-rust": "0.20.2",
     "@gitlab/svgs": "3.146.0",
-    "@gitlab/ui": "119.1.0",
+    "@gitlab/ui": "https://gitlab.com/gitlab-org/gitlab-services/design.gitlab.com/-/jobs/11150572156/artifacts/raw/packages/gitlab-ui/gitlab-ui.sdejonge-experiment-radii.tgz",
     "@gitlab/vue-router-vue3": "npm:vue-router@4.5.1",
     "@gitlab/vuex-vue3": "npm:vuex@4.1.0",
     "@gitlab/web-ide": "^0.0.1-dev-20250818141247",
diff --git a/yarn.lock b/yarn.lock
index 5995b4d31a06264657c4a1a0178ae866b8837356..f6e2f2020788ea52f38dde087fc34e53c419f6a9 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1351,7 +1351,7 @@
     "@floating-ui/core" "^1.7.3"
     "@floating-ui/utils" "^0.2.10"
 
-"@floating-ui/dom@^1.0.0", "@floating-ui/dom@^1.7.4":
+"@floating-ui/dom@1.7.4", "@floating-ui/dom@^1.0.0", "@floating-ui/dom@^1.7.4":
   version "1.7.4"
   resolved "https://registry.yarnpkg.com/@floating-ui/dom/-/dom-1.7.4.tgz#ee667549998745c9c3e3e84683b909c31d6c9a77"
   integrity sha512-OOchDgh4F2CchOX94cRVqhvy7b3AFb+/rQXyswmzmGakRfkMgoWVjfnLWkRirfLEfuD4ysVW16eXzwt3jHIzKA==
@@ -1438,7 +1438,7 @@
   resolved "https://registry.yarnpkg.com/@gitlab/fonts/-/fonts-1.3.1.tgz#dd335ed25cb33927abc1d80dfbfa31fc93e9bd15"
   integrity sha512-/7Q5Sy9Q3pmutV/1EgURm3iDZtV0HcE4nTwFpHLCrGDdxQ3pNv6SdujzeJExnfiI5Y+1FGfOvKwOlmiVuyDtzA==
 
-"@gitlab/noop@^1.0.1":
+"@gitlab/noop@^1.0.1", jackspeak@^3.1.2, "jackspeak@npm:@gitlab/noop@1.0.1":
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/@gitlab/noop/-/noop-1.0.1.tgz#71a831146ee02732b4a61d2d3c11204564753454"
   integrity sha512-s++4wjMYeDvBp9IO59DBrWjy8SE/gFkjTDO5ck2W0S6Vv7OlqgErwL7pHngAnrSmTJAzyUG8wHGqo0ViS4jn5Q==
@@ -1465,12 +1465,11 @@
   resolved "https://registry.yarnpkg.com/@gitlab/svgs/-/svgs-3.146.0.tgz#9d2005978252296cbff9bf47f7f2c0f29c7d35e2"
   integrity sha512-KEPhXsRQkaWjyApjk71t8aIKgMjqZ+QtgRe2H82vXsj+G17XoDDXAHl7Zw00PLf4IrJjn6ur6aS2A6CmTVHDLA==
 
-"@gitlab/ui@119.1.0":
-  version "119.1.0"
-  resolved "https://registry.yarnpkg.com/@gitlab/ui/-/ui-119.1.0.tgz#5e1da597c2e42461cf291b222b6e88f65b988232"
-  integrity sha512-/1+ZHDKb/fYdQrUrrnvtv4ml0FpamtkqboqryuVHZVX6PYMHjHob8CzLu1AUy+TLUZE8XcJY4dUG1NrQJ1qQaw==
+"@gitlab/ui@https://gitlab.com/gitlab-org/gitlab-services/design.gitlab.com/-/jobs/11150572156/artifacts/raw/packages/gitlab-ui/gitlab-ui.sdejonge-experiment-radii.tgz":
+  version "120.0.0"
+  resolved "https://gitlab.com/gitlab-org/gitlab-services/design.gitlab.com/-/jobs/11150572156/artifacts/raw/packages/gitlab-ui/gitlab-ui.sdejonge-experiment-radii.tgz#4b40d6f030aefe5320c031f3fac7e50efc3f8ccd"
   dependencies:
-    "@floating-ui/dom" "1.7.3"
+    "@floating-ui/dom" "1.7.4"
     echarts "^5.6.0"
     gridstack "^12.3.3"
     iframe-resizer "^4.4.5"
@@ -9544,11 +9543,6 @@ istanbul-reports@^3.1.3:
     html-escaper "^2.0.0"
     istanbul-lib-report "^3.0.0"
 
-jackspeak@^3.1.2, "jackspeak@npm:@gitlab/noop@1.0.1":
-  version "1.0.1"
-  resolved "https://registry.yarnpkg.com/@gitlab/noop/-/noop-1.0.1.tgz#71a831146ee02732b4a61d2d3c11204564753454"
-  integrity sha512-s++4wjMYeDvBp9IO59DBrWjy8SE/gFkjTDO5ck2W0S6Vv7OlqgErwL7pHngAnrSmTJAzyUG8wHGqo0ViS4jn5Q==
-
 jed@^1.1.1:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/jed/-/jed-1.1.1.tgz#7a549bbd9ffe1585b0cd0a191e203055bee574b4"