diff --git a/source/02_language_guide/18_Concurrency.md b/source/02_language_guide/18_Concurrency.md
index 7f9bb373..1e0ca6a5 100644
--- a/source/02_language_guide/18_Concurrency.md
+++ b/source/02_language_guide/18_Concurrency.md
@@ -1 +1 @@
-# aasas
+#