diff --git a/requirements.txt b/requirements.txt
index 58717e8..c33b3be 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1 +1,5 @@
 lektor
+flask
+requests
+jinja2
+werkzeug==0.16.1
diff --git a/runtime.txt b/runtime.txt
new file mode 100644
index 0000000..475ba51
--- /dev/null
+++ b/runtime.txt
@@ -0,0 +1 @@
+3.7