diff --git a/lean-toolchain b/lean-toolchain
index 2c6e1c4b..c7e310c4 100644
--- a/lean-toolchain
+++ b/lean-toolchain
@@ -1 +1 @@
-leanprover/lean4:v4.22.0-rc4
+leanprover/lean4:v4.23.0-rc1