diff --git a/lib/silverpop/engage.rb b/lib/silverpop/engage.rb
index 3ec2c8c..f576004 100644
--- a/lib/silverpop/engage.rb
+++ b/lib/silverpop/engage.rb
@@ -61,6 +61,14 @@ def logout
         @session_encoding = nil
       end
       success?
+
+    rescue => e
+      if e.message == 'Session has expired or is invalid'
+        @session_id = nil
+        @session_encoding = nil
+      else
+        raise e
+      end
     end
 
     def logged_in?