diff --git a/Configuration-Files.md b/Configuration-Files.md
index a50f7ff..f9116c5 100644
--- a/Configuration-Files.md
+++ b/Configuration-Files.md
@@ -18,8 +18,9 @@ The `config.json` file is a JSON file with the following structure (make sure yo
     "filter_files_glob": "game_name_*_mac.dmg",
 
     // Filter downloaded files with a Python regex (entire file name must match, unmatched files are skipped)
+    // This is a JSON string - use a double backslash to produce a single backslash in your pattern!
     // Use https://regex101.com/ -> Python flavor to test your patterns first
-    "filter_files_regex": "dwarf_fortress_[\d_]+_windows\.zip"
+    "filter_files_regex": "dwarf_fortress_[\\d_]+_windows\\.zip"
 }
 ```