diff --git a/README.md b/README.md
index d46aed7..eda33aa 100644
--- a/README.md
+++ b/README.md
@@ -83,7 +83,14 @@ allowed_push_servers = ["https://your-instance-ntfy.sh"]
 
 ## Debugging
 
-RustiCal supports exporting opentelemetry traces to inspect with tools like [Jaeger](https://www.jaegertracing.io/).
+Set the log level with following environment variables:
+
+```sh
+RUST_LOG="debug"
+RUST_BACKTRACE=1
+```
+
+RustiCal also supports exporting opentelemetry traces to inspect with tools like [Jaeger](https://www.jaegertracing.io/).
 To enable you need to compile with the `opentelemtry` (or `debug`) feature and enable opentelemetry in the config with
 
 ```toml