diff --git a/scm-ui/ui-webapp/src/repos/components/changesets/ChangesetDetails.tsx b/scm-ui/ui-webapp/src/repos/components/changesets/ChangesetDetails.tsx
index ab691be69c..f6caa08c9b 100644
--- a/scm-ui/ui-webapp/src/repos/components/changesets/ChangesetDetails.tsx
+++ b/scm-ui/ui-webapp/src/repos/components/changesets/ChangesetDetails.tsx
@@ -102,7 +102,7 @@ const ContributorDetails = styled.div`
 
 const ContributorToggleLine = styled.p`
   cursor: pointer;
-  /** maring-bottom is inherit from content p **/
+  /** margin-bottom is inherit from content p **/
   margin-bottom: 0.5rem !important;
 `;
 
diff --git a/scm-ui/ui-webapp/src/repos/containers/ChangesetsRoot.tsx b/scm-ui/ui-webapp/src/repos/containers/ChangesetsRoot.tsx
index 5bc0e0d6e7..0a01e96b3a 100644
--- a/scm-ui/ui-webapp/src/repos/containers/ChangesetsRoot.tsx
+++ b/scm-ui/ui-webapp/src/repos/containers/ChangesetsRoot.tsx
@@ -76,12 +76,13 @@ class ChangesetsRoot extends React.Component<Props> {
     }
 
     const url = this.stripEndingSlash(match.url);
+    const defaultBranch = branches?.filter(b => b.defaultBranch === true)[0];
 
     return (
       <>
         <CodeActionBar
           branches={branches}
-          selectedBranch={!this.isBranchAvailable() ? selectedBranch : undefined}
+          selectedBranch={!this.isBranchAvailable() ? selectedBranch : defaultBranch?.name}
           onSelectBranch={this.onSelectBranch}
           switchViewLink={this.evaluateSwitchViewLink()}
         />
diff --git a/yarn.lock b/yarn.lock
index 552c9c455f..a7a1a693eb 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -11719,10 +11719,10 @@ mini-create-react-context@^0.4.0:
     "@babel/runtime" "^7.5.5"
     tiny-warning "^1.0.3"
 
-mini-css-extract-plugin@^0.10.0:
-  version "0.10.1"
-  resolved "https://registry.yarnpkg.com/mini-css-extract-plugin/-/mini-css-extract-plugin-0.10.1.tgz#2592c891f965e15750da6a6c0b60740b5b0cb62d"
-  integrity sha512-9B10gZixtNjHerADBrMxPXM5G0uL0CRGMcLRV67I8nd1SKbwJrI0okKUzD+PxKsUZ9Dxt8/hPvtzF0DrRnrOyA==
+mini-css-extract-plugin@^0.11.0:
+  version "0.11.2"
+  resolved "https://registry.yarnpkg.com/mini-css-extract-plugin/-/mini-css-extract-plugin-0.11.2.tgz#e3af4d5e04fbcaaf11838ab230510073060b37bf"
+  integrity sha512-h2LknfX4U1kScXxH8xE9LCOqT5B+068EAj36qicMb8l4dqdJoyHcmWmpd+ueyZfgu/POvIn+teoUnTtei2ikug==
   dependencies:
     loader-utils "^1.1.0"
     normalize-url "1.9.1"