diff --git a/requirements_dev.txt b/requirements_dev.txt
index 9ef4da8..f813fcd 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -16,7 +16,7 @@ pytest-cov==2.7.1
 numpy==1.16.4
 pandas==0.24.2
 requests==2.22.0
-aiohttp==3.5.4
+aiohttp==3.8.5
 aiofiles==0.4.0
 vcfpy2==0.1.2
 pysam==0.15.2