diff --git a/requirements_dev.txt b/requirements_dev.txt
index 1abcf36..f90b69e 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==3.7.4
 aiofiles==0.4.0
 vcfpy2==0.1.2
 pysam==0.15.2
diff --git a/setup.py b/setup.py
index 1c2fb3e..52121d1 100644
--- a/setup.py
+++ b/setup.py
@@ -10,7 +10,7 @@
     history = history_file.read()
 
 requirements = ["Click==7.0", "requests==2.22.0", "numpy==1.16.4",
-                "pandas==0.24.2", "aiohttp==3.5.4", "aiofiles==0.4.0",
+                "pandas==0.24.2", "aiohttp==3.7.4", "aiofiles==0.4.0",
                 "vcfpy2==0.1.2", "scikit-allel==1.2.1"]
 
 setup_requirements = ['pytest-runner', ]