diff --git a/Debug.md b/Debug.md
index 9353ffc..1c74572 100644
--- a/Debug.md
+++ b/Debug.md
@@ -2,4 +2,5 @@ Run `aquatic-crawler` with following arguments:
 
 ``` bash
 RUST_LOG=DEBUG aquatic-crawler {ARGUMENTS}
-```
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+```
+* [supported levels](https://docs.rs/tracing-subscriber/latest/tracing_subscriber/filter/struct.LevelFilter.html)
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