diff --git a/test-lambda-function/build.sh b/test-lambda-function/build.sh
index d81bb3b..64e6eac 100755
--- a/test-lambda-function/build.sh
+++ b/test-lambda-function/build.sh
@@ -1,12 +1,15 @@
 #!/usr/bin/env bash
+set -euo pipefail
 
-set -ex
+if ! command -v uv &> /dev/null; then
+    curl -LsSf https://astral.sh/uv/install.sh | sh
+fi
 
 rm -rf lambda_function_package.zip
 rm -rf ./python_with_sentry/package/*
 
-pip install --target ./python_with_sentry/package -r requirements.txt
+uv pip install --target ./python_with_sentry/package -r pyproject.toml
 
 cd ./python_with_sentry/package && zip -x "**/__pycache__/*" -r ../../lambda_function_package.zip . && cd -
 
-cd ./python_with_sentry && zip -g ../lambda_function_package.zip lambda_function.py && cd -
\ No newline at end of file
+cd ./python_with_sentry && zip -g ../lambda_function_package.zip lambda_function.py && cd -
diff --git a/test-lambda-function/pyproject.toml b/test-lambda-function/pyproject.toml
new file mode 100644
index 0000000..96f8e65
--- /dev/null
+++ b/test-lambda-function/pyproject.toml
@@ -0,0 +1,11 @@
+[project]
+name = "test-lambda-function"
+version = "0"
+requires-python = ">=3.12"
+
+dependencies = [
+    "sentry-sdk",
+]
+
+[tool.uv.sources]
+sentry-sdk = { path = "../../sentry-python", editable = true }
diff --git a/test-lambda-function/requirements.txt b/test-lambda-function/requirements.txt
deleted file mode 100644
index 4b614c7..0000000
--- a/test-lambda-function/requirements.txt
+++ /dev/null
@@ -1 +0,0 @@
-sentry-sdk
\ No newline at end of file