diff --git a/requirements/runtime.txt b/requirements/runtime.txt
new file mode 100644
index 0000000..901f0d5
--- /dev/null
+++ b/requirements/runtime.txt
@@ -0,0 +1,3 @@
+# Enter packages needed at runtime. One package per line. Version numbers are optional
+# E.g. 
+# numpy>=12.0