diff --git a/lib/wpscan/db/dynamic_finders/base.rb b/lib/wpscan/db/dynamic_finders/base.rb
index bc795a16..3844ea50 100644
--- a/lib/wpscan/db/dynamic_finders/base.rb
+++ b/lib/wpscan/db/dynamic_finders/base.rb
@@ -4,7 +4,7 @@ module WPScan
       class Base
         # @return [ String ]
         def self.db_file
-          @db_file ||= DB_DIR.join('dynamic_finders.yml')
+          @db_file ||= DB_DIR.join('dynamic_finders.yml').to_s
         end
 
         # @return [ Hash ]