diff --git a/Benchmarks/CatalogReal/lean-toolchain b/Benchmarks/CatalogReal/lean-toolchain
index 025e59548..a8afa7d1b 100644
--- a/Benchmarks/CatalogReal/lean-toolchain
+++ b/Benchmarks/CatalogReal/lean-toolchain
@@ -1 +1 @@
-leanprover/lean4:v4.33.0
+leanprover/lean4:v4.33.1
diff --git a/Benchmarks/CatalogSpine/lean-toolchain b/Benchmarks/CatalogSpine/lean-toolchain
index 025e59548..a8afa7d1b 100644
--- a/Benchmarks/CatalogSpine/lean-toolchain
+++ b/Benchmarks/CatalogSpine/lean-toolchain
@@ -1 +1 @@
-leanprover/lean4:v4.33.0
+leanprover/lean4:v4.33.1
diff --git a/Benchmarks/CompileFC/lean-toolchain b/Benchmarks/CompileFC/lean-toolchain
index 5249182c0..a8afa7d1b 100644
--- a/Benchmarks/CompileFC/lean-toolchain
+++ b/Benchmarks/CompileFC/lean-toolchain
@@ -1 +1 @@
-leanprover/lean4:v4.27.0
+leanprover/lean4:v4.33.1