diff --git a/demos/blog/requirements.txt b/demos/blog/requirements.txt
index 3f6f3eace..1ddc99703 100644
--- a/demos/blog/requirements.txt
+++ b/demos/blog/requirements.txt
@@ -1,4 +1,4 @@
-aiohttp==3.11.18
+aiohttp==3.12.11
 aiohttp-jinja2==1.6
 aiohttp-security[session]==0.5.0
 asyncpg==0.30.0
diff --git a/demos/chat/requirements.txt b/demos/chat/requirements.txt
index 0ef352072..8b0810912 100644
--- a/demos/chat/requirements.txt
+++ b/demos/chat/requirements.txt
@@ -1,3 +1,3 @@
-aiohttp==3.11.18
+aiohttp==3.12.11
 aiohttp-jinja2==1.6
 faker==37.3.0
diff --git a/demos/graphql-demo/requirements-dev.txt b/demos/graphql-demo/requirements-dev.txt
index da82d19b3..a08b8958a 100644
--- a/demos/graphql-demo/requirements-dev.txt
+++ b/demos/graphql-demo/requirements-dev.txt
@@ -1,4 +1,4 @@
-aiohttp==3.11.18
+aiohttp==3.12.11
 aiohttp-jinja2==1.6
 aiohttp-graphql==1.1.0
 aiodataloader==0.4.2
diff --git a/demos/imagetagger/requirements.txt b/demos/imagetagger/requirements.txt
index ef1e2ad65..af1461fa8 100644
--- a/demos/imagetagger/requirements.txt
+++ b/demos/imagetagger/requirements.txt
@@ -1,4 +1,4 @@
-aiohttp==3.11.18
+aiohttp==3.12.11
 aiohttp-jinja2==1.6
 keras==3.10.0
 Pillow==11.2.1
diff --git a/demos/moderator/requirements-dev.txt b/demos/moderator/requirements-dev.txt
index 2f757f5a7..74d046009 100644
--- a/demos/moderator/requirements-dev.txt
+++ b/demos/moderator/requirements-dev.txt
@@ -1,4 +1,4 @@
-aiohttp==3.11.18
+aiohttp==3.12.11
 trafaret==2.1.1
 pyyaml==6.0.2
 numpy==1.26.4
diff --git a/demos/moderator_bot/requirements-dev.txt b/demos/moderator_bot/requirements-dev.txt
index c9c2eb603..30b3c7178 100644
--- a/demos/moderator_bot/requirements-dev.txt
+++ b/demos/moderator_bot/requirements-dev.txt
@@ -1,5 +1,5 @@
 -i https://pypi.org/simple/
-aiohttp==3.11.18
+aiohttp==3.12.11
 async-timeout==5.0.1
 atomicwrites==1.4.1
 attrs==25.3.0
diff --git a/demos/motortwit/requirements.txt b/demos/motortwit/requirements.txt
index 328d75c08..1e11df8fa 100644
--- a/demos/motortwit/requirements.txt
+++ b/demos/motortwit/requirements.txt
@@ -1,4 +1,4 @@
-aiohttp==3.11.18
+aiohttp==3.12.11
 aiohttp-jinja2==1.6
 aiohttp-security==0.5.0
 bcrypt==4.3.0
diff --git a/demos/polls/requirements-dev.txt b/demos/polls/requirements-dev.txt
index 61288d047..fff841cb6 100644
--- a/demos/polls/requirements-dev.txt
+++ b/demos/polls/requirements-dev.txt
@@ -1,4 +1,4 @@
-aiohttp==3.11.18
+aiohttp==3.12.11
 aiohttp-jinja2==1.6
 asyncpg==0.30.0
 trafaret_config==2.0.2
diff --git a/demos/shortify/requirements.txt b/demos/shortify/requirements.txt
index 138745d95..38e0fc249 100644
--- a/demos/shortify/requirements.txt
+++ b/demos/shortify/requirements.txt
@@ -1,4 +1,4 @@
-aiohttp==3.11.18
+aiohttp==3.12.11
 aiohttp-jinja2==1.6
 pyyaml==6.0.2
 redis==6.1.0