diff --git a/2/onbuild/Dockerfile b/2/onbuild/Dockerfile
new file mode 100644
index 000000000..566623c80
--- /dev/null
+++ b/2/onbuild/Dockerfile
@@ -0,0 +1,8 @@
+FROM python:2
+
+RUN mkdir -p /usr/src/app
+WORKDIR /usr/src/app
+
+ONBUILD ADD requirements.txt /usr/src/app/requirements.txt
+ONBUILD RUN pip install -r /usr/src/app/requirements.txt
+ONBUILD ADD . /usr/src/app
diff --git a/3/onbuild/Dockerfile b/3/onbuild/Dockerfile
new file mode 100644
index 000000000..858fd2161
--- /dev/null
+++ b/3/onbuild/Dockerfile
@@ -0,0 +1,8 @@
+FROM python:3
+
+RUN mkdir -p /usr/src/app
+WORKDIR /usr/src/app
+
+ONBUILD ADD requirements.txt /usr/src/app/requirements.txt
+ONBUILD RUN pip install -r /usr/src/app/requirements.txt
+ONBUILD ADD . /usr/src/app