diff --git a/CHANGELOG-2.x.md b/CHANGELOG-2.x.md
index 02ad56e2e8..6915eb9701 100644
--- a/CHANGELOG-2.x.md
+++ b/CHANGELOG-2.x.md
@@ -9,7 +9,12 @@
 - Fix search bar focus bug. When you put the focus on search input, previously the focus will remain although we have clicked to other area outside of the search input.
 - New themeConfig option `sidebarCollapsible`. It is on by default. If explicitly set to `false`, all doc items in sidebar is expanded. Otherwise, it will still be a collapsible sidebar.
 - Disable adding hashes to the generated class names of CSS modules in dev mode. Generating unique identifiers takes some time, which can be saved since including paths to files in class names is enough to avoid collisions.
-- Fix showing sidebar category with empty items.
+- Update infima from 0.2.0-alpha.2 to 0.2.0-alpha.3
+  - Fix showing sidebar category with empty items.
+  - Fix pagination nav and right sidebar color contrast ratio
+  - Fix sidebar arrow color in dark mode
+  - Fix footer mobile issue
+  - etc
 
 ## 2.0.0-alpha.30
 
diff --git a/packages/docusaurus-theme-classic/package.json b/packages/docusaurus-theme-classic/package.json
index f0974af6d0..f0185c063c 100644
--- a/packages/docusaurus-theme-classic/package.json
+++ b/packages/docusaurus-theme-classic/package.json
@@ -12,7 +12,7 @@
     "@mdx-js/react": "^1.5.1",
     "classnames": "^2.2.6",
     "clipboard": "^2.0.4",
-    "infima": "0.2.0-alpha.2",
+    "infima": "0.2.0-alpha.3",
     "prism-react-renderer": "^1.0.2",
     "react-toggle": "^4.1.1"
   },
diff --git a/packages/docusaurus-theme-classic/src/theme/Navbar/index.js b/packages/docusaurus-theme-classic/src/theme/Navbar/index.js
index f60d3c331c..48097a069c 100644
--- a/packages/docusaurus-theme-classic/src/theme/Navbar/index.js
+++ b/packages/docusaurus-theme-classic/src/theme/Navbar/index.js
@@ -165,13 +165,13 @@ function Navbar() {
         </div>
         <div
           role="presentation"
-          className="navbar__sidebar__backdrop"
+          className="navbar-sidebar__backdrop"
           onClick={() => {
             setSidebarShown(false);
           }}
         />
-        <div className="navbar__sidebar">
-          <div className="navbar__sidebar__brand">
+        <div className="navbar-sidebar">
+          <div className="navbar-sidebar__brand">
             <Link className="navbar__brand" onClick={hideSidebar} to={baseUrl}>
               {logo != null && (
                 <img className="navbar__logo" src={logoUrl} alt={logo.alt} />
@@ -190,7 +190,7 @@ function Navbar() {
               />
             )}
           </div>
-          <div className="navbar__sidebar__items">
+          <div className="navbar-sidebar__items">
             <div className="menu">
               <ul className="menu__list">
                 {links.map((linkItem, i) => (
diff --git a/packages/docusaurus-theme-search-algolia/src/theme/SearchBar/index.js b/packages/docusaurus-theme-search-algolia/src/theme/SearchBar/index.js
index c5a5ce6616..aad9686ac5 100644
--- a/packages/docusaurus-theme-search-algolia/src/theme/SearchBar/index.js
+++ b/packages/docusaurus-theme-search-algolia/src/theme/SearchBar/index.js
@@ -76,6 +76,7 @@ const Search = props => {
         placeholder="Search"
         aria-label="Search"
         className={classnames(
+          'navbar__search-input',
           {'search-bar-expanded': props.isSearchBarExpanded},
           {'search-bar': !props.isSearchBarExpanded},
         )}
diff --git a/yarn.lock b/yarn.lock
index 049498974f..99ef5d855c 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -8419,10 +8419,10 @@ infer-owner@^1.0.3, infer-owner@^1.0.4:
   resolved "https://registry.yarnpkg.com/infer-owner/-/infer-owner-1.0.4.tgz#c4cefcaa8e51051c2a40ba2ce8a3d27295af9467"
   integrity sha512-IClj+Xz94+d7irH5qRyfJonOdfTzuDaifE6ZPWfx0N0+/ATZCbuTPq2prFl526urkQd90WyUKIh1DfBQ2hMz9A==
 
-infima@0.2.0-alpha.2:
-  version "0.2.0-alpha.2"
-  resolved "https://registry.yarnpkg.com/infima/-/infima-0.2.0-alpha.2.tgz#cfba3bcf5cd8f54cdfa47850d000ce6967a12c57"
-  integrity sha512-lCcCTjhQfjV/f1D34/T8BtjxslcLRxkUQdKoYv79CWk8OEPeEr24lyfVUhPyIJkgSeQZ35RSKam0GusIsxI++w==
+infima@0.2.0-alpha.3:
+  version "0.2.0-alpha.3"
+  resolved "https://registry.yarnpkg.com/infima/-/infima-0.2.0-alpha.3.tgz#86c0bd9ee7a38e921bee0611970f1a7b71d69b32"
+  integrity sha512-3DusmJsdsaZeLYgcHubVQHqRht/0/evhfGaqQBcBgp/vnc7TEeoLUBREJTHMFdCoZUGDy2UfkNiMAwpUrVhyEg==
 
 inflight@^1.0.4:
   version "1.0.6"