diff --git a/homeassistant/package_constraints.txt b/homeassistant/package_constraints.txt
index 26628d7fe62..fdff380301f 100644
--- a/homeassistant/package_constraints.txt
+++ b/homeassistant/package_constraints.txt
@@ -1,4 +1,4 @@
-aiohttp==3.3.2
+aiohttp==3.4.0
 astral==1.6.1
 async_timeout==3.0.0
 attrs==18.1.0
diff --git a/requirements_all.txt b/requirements_all.txt
index 2cd19d58ce6..2f27662b2e7 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -1,5 +1,5 @@
 # Home Assistant core
-aiohttp==3.3.2
+aiohttp==3.4.0
 astral==1.6.1
 async_timeout==3.0.0
 attrs==18.1.0
diff --git a/setup.py b/setup.py
index 7484dc286e6..8e2ad008cc6 100755
--- a/setup.py
+++ b/setup.py
@@ -32,7 +32,7 @@ PROJECT_URLS = {
 PACKAGES = find_packages(exclude=['tests', 'tests.*'])
 
 REQUIRES = [
-    'aiohttp==3.3.2',
+    'aiohttp==3.4.0',
     'astral==1.6.1',
     'async_timeout==3.0.0',
     'attrs==18.1.0',