diff --git a/demos/blog/requirements.txt b/demos/blog/requirements.txt
index d45bd61ae..f02803f5d 100644
--- a/demos/blog/requirements.txt
+++ b/demos/blog/requirements.txt
@@ -1,4 +1,4 @@
-aiohttp==3.11.18
+aiohttp==3.12.15
 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..415dae055 100644
--- a/demos/chat/requirements.txt
+++ b/demos/chat/requirements.txt
@@ -1,3 +1,3 @@
-aiohttp==3.11.18
+aiohttp==3.12.15
 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 6508f0e70..3c59d34fc 100644
--- a/demos/graphql-demo/requirements-dev.txt
+++ b/demos/graphql-demo/requirements-dev.txt
@@ -1,4 +1,4 @@
-aiohttp==3.11.18
+aiohttp==3.12.15
 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 ace071b5c..973378821 100644
--- a/demos/imagetagger/requirements.txt
+++ b/demos/imagetagger/requirements.txt
@@ -1,4 +1,4 @@
-aiohttp==3.11.18
+aiohttp==3.12.15
 aiohttp-jinja2==1.6
 keras==3.10.0
 Pillow==11.3.0
diff --git a/demos/moderator/requirements-dev.txt b/demos/moderator/requirements-dev.txt
index e900a55a9..6950e71b1 100644
--- a/demos/moderator/requirements-dev.txt
+++ b/demos/moderator/requirements-dev.txt
@@ -1,4 +1,4 @@
-aiohttp==3.11.18
+aiohttp==3.12.15
 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 6a525f4d1..a823de51f 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==3.12.15
 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..875d4aed3 100644
--- a/demos/motortwit/requirements.txt
+++ b/demos/motortwit/requirements.txt
@@ -1,4 +1,4 @@
-aiohttp==3.11.18
+aiohttp==3.12.15
 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 66582947f..dab900cbf 100644
--- a/demos/polls/requirements-dev.txt
+++ b/demos/polls/requirements-dev.txt
@@ -1,4 +1,4 @@
-aiohttp==3.11.18
+aiohttp==3.12.15
 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 a7844534d..80e6fefd2 100644
--- a/demos/shortify/requirements.txt
+++ b/demos/shortify/requirements.txt
@@ -1,4 +1,4 @@
-aiohttp==3.11.18
+aiohttp==3.12.15
 aiohttp-jinja2==1.6
 pyyaml==6.0.2
 redis==6.2.0