diff --git a/README.md b/README.md
index 06cb6d0..bdc6ae4 100644
--- a/README.md
+++ b/README.md
@@ -55,7 +55,7 @@ Example LogQL queries in Grafana Explore (Loki data source):
 ```
 {container="quartermaster"} | json
 {container="quartermaster", event="http_request", status=~"5.."}
-{container="quartermaster", event="month_closed"} | json | line_format "{{.path}} {{.message}}"
+{container="quartermaster", event="month_closed"} | json | line_format "{{.year_month}} {{.message}}"
 ```
 
 HTTP access logs appear as `event="http_request"` with `method`, `path`,
diff --git a/src/quartermaster/logconfig.json b/src/quartermaster/logconfig.json
index 90e6c6a..0595f06 100644
--- a/src/quartermaster/logconfig.json
+++ b/src/quartermaster/logconfig.json
@@ -3,7 +3,7 @@
   "disable_existing_loggers": false,
   "formatters": {
     "json": {
-      "()": "pythonjsonlogger.jsonlogger.JsonFormatter",
+      "()": "pythonjsonlogger.json.JsonFormatter",
       "fmt": "%(asctime)s %(levelname)s %(name)s %(message)s",
       "rename_fields": {
         "asctime": "timestamp",