diff --git a/Cli/Basic.lean b/Cli/Basic.lean
index b39ae6e..918d798 100644
--- a/Cli/Basic.lean
+++ b/Cli/Basic.lean
@@ -1,4 +1,4 @@
-import Std.Data.RBTree
+import Bootstrap.Data.RBTree
 
 section Utils
   /--
diff --git a/lean-toolchain b/lean-toolchain
index 2d7ca76..3a7df6c 100644
--- a/lean-toolchain
+++ b/lean-toolchain
@@ -1 +1 @@
-leanprover/lean4:nightly-2022-07-10
+leanprover/lean4:nightly-2022-08-30