diff --git a/src/client.js b/src/client.js
index 0ff29daa9ac1cd4f406944b3e195738d520b2c57..90ef5dc7228e8b1678f72e2573b42bd222a527c1 100644
--- a/src/client.js
+++ b/src/client.js
@@ -32,6 +32,8 @@ class RPCClient extends EventEmitter {
     this.options = options;
 
     this.accessToken = null;
+    this.refreshToken = null;
+    this.accessTokenExpiresAt = null;
     this.clientId = null;
 
     /**
@@ -222,6 +224,13 @@ class RPCClient extends EventEmitter {
       }),
     });
 
+    const {
+      access_token, refresh_token, expires_in
+    } = response;
+
+    this.refreshToken = refresh_token;
+    this.accessTokenExpiresAt = Date.now() + (expires_in * 1000);
+
     return response.access_token;
   }