diff --git a/mastodon-kanidm-sync.py b/mastodon-kanidm-sync.py
index 8d5a8ee..593de42 100644
--- a/mastodon-kanidm-sync.py
+++ b/mastodon-kanidm-sync.py
@@ -21,11 +21,14 @@ def getenv(name):
 # Import configuration
 KANIDM_URL = getenv("KANIDM_URL")
 KANIDM_TOKEN = read_file(getenv("KANIDM_TOKEN_PATH")).strip()
-USERDATA = read_file(getenv("USERDATA_FILE_PATH")).strip()
 
-# Fetch configuration from userdata file
+# Fetch kanidm users list from userdata file
 # Userdata file is json list with information about what users are configured by kanidm
-userdata = json.loads(USERDATA)
+try:
+  USERDATA = read_file(getenv("USERDATA_FILE_PATH")).strip()
+  userdata = json.loads(USERDATA)
+except FileNotFoundError:
+  userdata = []
 
 # Load database
 conn = ps.connect(