diff --git a/archivebox/config.py b/archivebox/config.py
index 0bf24efa..464893b1 100644
--- a/archivebox/config.py
+++ b/archivebox/config.py
@@ -353,20 +353,20 @@ STATICFILE_EXTENSIONS = {
 # These files are exceptions to the is_empty check when we're trying to init a new dir,
 # as they could be from a previous archivebox version, system artifacts, dependencies, etc.
 ALLOWED_IN_OUTPUT_DIR = {
-    '.gitignore',
-    'lost+found',
-    '.DS_Store',
-    '.venv',
-    'venv',
-    'virtualenv',
-    '.virtualenv',
-    'node_modules',
-    'package.json',
-    'package-lock.json',
-    'yarn.lock',
-    'static',
-    'sonic',
-    'search.sqlite3',
+    ".gitignore",
+    "lost+found",
+    ".DS_Store",
+    ".venv",
+    "venv",
+    "virtualenv",
+    ".virtualenv",
+    "node_modules",
+    "package.json",
+    "package-lock.json",
+    "yarn.lock",
+    "static",
+    "sonic",
+    "search.sqlite3",
     CRONTABS_DIR_NAME,
     ARCHIVE_DIR_NAME,
     SOURCES_DIR_NAME,
@@ -374,15 +374,18 @@ ALLOWED_IN_OUTPUT_DIR = {
     CACHE_DIR_NAME,
     PERSONAS_DIR_NAME,
     SQL_INDEX_FILENAME,
-    f'{SQL_INDEX_FILENAME}-wal',
-    f'{SQL_INDEX_FILENAME}-shm',
+    f"{SQL_INDEX_FILENAME}-wal",
+    f"{SQL_INDEX_FILENAME}-shm",
+    "queue.sqlite3",
+    "queue.sqlite3-wal",
+    "queue.sqlite3-shm",
     JSON_INDEX_FILENAME,
     HTML_INDEX_FILENAME,
     ROBOTS_TXT_FILENAME,
     FAVICON_FILENAME,
     CONFIG_FILENAME,
-    f'{CONFIG_FILENAME}.bak',
-    'static_index.json',
+    f"{CONFIG_FILENAME}.bak",
+    "static_index.json",
 }