diff --git a/requirements/py3_common.txt b/requirements/py3_common.txt
new file mode 100644
index 0000000000..b99c08e50b
--- /dev/null
+++ b/requirements/py3_common.txt
@@ -0,0 +1,4 @@
+-r common.txt
+
+# Used for Hesiod lookups, etc.
+py3dns==3.1.0
diff --git a/requirements/py3_dev.txt b/requirements/py3_dev.txt
new file mode 100644
index 0000000000..1495c6067b
--- /dev/null
+++ b/requirements/py3_dev.txt
@@ -0,0 +1,3 @@
+-r py3_common.txt
+-r dev.txt
+-r mypy.txt