diff --git a/aws_lambda/relayers_observer/Dockerfile b/aws_lambda/relayers_observer/Dockerfile
index 980a36e91..99ebcebcf 100644
--- a/aws_lambda/relayers_observer/Dockerfile
+++ b/aws_lambda/relayers_observer/Dockerfile
@@ -1,5 +1,6 @@
 # trunk-ignore-all(checkov/CKV_DOCKER_2)
 # trunk-ignore-all(checkov/CKV_DOCKER_3)
+# trunk-ignore-all(hadolint/DL3013)
 # trunk-ignore-all(hadolint/DL3033)
 FROM amazon/aws-lambda-python:3.10
 
@@ -10,8 +11,11 @@ RUN yum update -y && \
 
 WORKDIR /var/task
 
-COPY requirements.txt ./requirements.txt
-RUN pip install --no-cache-dir -r requirements.txt setuptools
+RUN pip install --no-cache-dir uv && uv venv
+
+COPY pyproject.toml ./
+
+RUN pip install --no-cache-dir -e '.[lambda-dependencies]'
 
 COPY build ./build
 COPY deployments ./deployments
diff --git a/aws_lambda/relayers_observer/pyproject.toml b/aws_lambda/relayers_observer/pyproject.toml
new file mode 100644
index 000000000..c40517e4e
--- /dev/null
+++ b/aws_lambda/relayers_observer/pyproject.toml
@@ -0,0 +1,30 @@
+[project]
+name = "relayers_observer"
+version = "0.1.0"
+description = "Relayers Observer Lambda function"
+requires-python = ">=3.10,<3.11"
+
+[project.optional-dependencies]
+lambda-dependencies = [
+  "starknet-py==0.23.0",
+  "python-dotenv==0.21.0",
+  "web3==6",
+  "async_lru==2.0.4",
+  "cairo-lang==0.13.1",
+  "requests==2.32.3",
+  "eth_keys==0.5.1",
+  "boto3==1.35.36",
+]
+
+cdk-dependencies = ["aws-cdk-lib==2.161.1", "constructs>=10.0.0,<11.0.0"]
+
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
+
+[tool.hatch.build]
+include = [
+  "relayers_observer.py",
+  "relayers_observer_lambda_stack.py",
+  "app.py",
+]
diff --git a/aws_lambda/relayers_observer/requirements.txt b/aws_lambda/relayers_observer/requirements.txt
deleted file mode 100644
index 203b980ce..000000000
--- a/aws_lambda/relayers_observer/requirements.txt
+++ /dev/null
@@ -1,13 +0,0 @@
-# AWS CDK requirements
-aws-cdk-lib==2.161.1
-constructs>=10.0.0,<11.0.0
-
-# AWS lambda requirements
-starknet-py==0.23.0
-python-dotenv==0.21.0
-web3==6
-async_lru==2.0.4
-cairo-lang==0.13.1
-requests==2.32.3
-eth_keys==0.5.1
-boto3==1.35.36
\ No newline at end of file