diff --git a/stack.yaml.lock b/stack.yaml.lock
new file mode 100644
index 0000000..7aaee15
--- /dev/null
+++ b/stack.yaml.lock
@@ -0,0 +1,12 @@
+# This file was autogenerated by Stack.
+# You should not edit this file by hand.
+# For more information, please see the documentation at:
+#   https://docs.haskellstack.org/en/stable/lock_files
+
+packages: []
+snapshots:
+- completed:
+    size: 507599
+    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/11/11.yaml
+    sha256: 5ec0a1ff4dadde524eb529784556bcc32014422fd1e1ed91231c59f001e92ca9
+  original: lts-11.11