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-rw-r--r--backends/lean/lean-toolchain2
1 files changed, 1 insertions, 1 deletions
diff --git a/backends/lean/lean-toolchain b/backends/lean/lean-toolchain
index 9ad30404..29c0cea4 100644
--- a/backends/lean/lean-toolchain
+++ b/backends/lean/lean-toolchain
@@ -1 +1 @@
-leanprover/lean4:v4.7.0
+leanprover/lean4:v4.9.0-rc2