diff --git a/lib/reducers/keyserver-reducer.js b/lib/reducers/keyserver-reducer.js
--- a/lib/reducers/keyserver-reducer.js
+++ b/lib/reducers/keyserver-reducer.js
@@ -163,6 +163,15 @@
         },
       };
     }
+    if (action.payload.error === 'client_version_unsupported') {
+      newKeyserverInfo = {
+        ...newKeyserverInfo,
+        connection: {
+          ...newKeyserverInfo.connection,
+          connectionIssue: 'client_version_unsupported',
+        },
+      };
+    }
 
     const operations: ReplaceKeyserverOperation[] = [];
     if (newKeyserverInfo !== state.keyserverInfos[keyserverID]) {
diff --git a/lib/socket/socket.react.js b/lib/socket/socket.react.js
--- a/lib/socket/socket.react.js
+++ b/lib/socket/socket.react.js
@@ -479,14 +479,30 @@
         });
       }
     } else if (message.type === serverSocketMessageTypes.AUTH_ERROR) {
-      this.props.dispatch({
-        type: setActiveSessionRecoveryActionType,
-        payload: {
-          activeSessionRecovery:
-            recoveryActionSources.socketAuthErrorResolutionAttempt,
-          keyserverID: this.props.keyserverID,
-        },
-      });
+      if (message.message === 'client_version_unsupported') {
+        this.props.dispatch({
+          type: setNewSessionActionType,
+          payload: {
+            sessionChange: {
+              ...message.sessionChange,
+              cookieInvalidated: true,
+            },
+            preRequestUserState: this.initializedWithUserState,
+            error: message.message,
+            authActionSource: undefined,
+            keyserverID: this.props.keyserverID,
+          },
+        });
+      } else {
+        this.props.dispatch({
+          type: setActiveSessionRecoveryActionType,
+          payload: {
+            activeSessionRecovery:
+              recoveryActionSources.socketAuthErrorResolutionAttempt,
+            keyserverID: this.props.keyserverID,
+          },
+        });
+      }
     }
   };