diff --git a/concurrency_vs_parallelism/requirements.txt b/concurrency_vs_parallelism/requirements.txt
index 32f6a37..00bbcb5 100644
--- a/concurrency_vs_parallelism/requirements.txt
+++ b/concurrency_vs_parallelism/requirements.txt
@@ -1,5 +1,5 @@
 aiofiles==0.3.1
-aiohttp==2.2.5
+aiohttp==3.7.4
 async-timeout==1.4.0
 certifi==2017.7.27.1
 chardet==3.0.4