diff --git a/classes/plugin.php b/classes/plugin.php
index 35497fc..9834701 100644
--- a/classes/plugin.php
+++ b/classes/plugin.php
@@ -306,6 +306,8 @@ function maybe_upgrade() {
 			if ( $total_affected > 0 ) {
 				wp_cache_flush();
 			}
+			// Set the version key, in the instance where the plugin wasn't previously used.
+			update_option( self::VERSION_KEY, 3, false );
 		}
 	}