diff --git a/compatibility/v0 b/compatibility/v0
new file mode 100644
index 0000000..fd56e87
--- /dev/null
+++ b/compatibility/v0
@@ -0,0 +1 @@
+3.21.0.36
diff --git a/compatibility/v1 b/compatibility/v1
new file mode 100644
index 0000000..d22e7ba
--- /dev/null
+++ b/compatibility/v1
@@ -0,0 +1 @@
+99.99.99.99