diff --git a/build-layer.sh b/build-layer.sh
new file mode 100755
index 0000000..49ea2df
--- /dev/null
+++ b/build-layer.sh
@@ -0,0 +1,4 @@
+#!/bin/bash
+
+docker run -v "$PWD":/var/task "public.ecr.aws/sam/build-python3.8" /bin/sh -c "pip install -r requirements.txt -t python/lib/python3.8/site-packages/; exit"
+zip -r pycares-lambda-layers.zip python > /dev/null
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..811cbaf
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1 @@
+pycares==4.2.1