diff --git a/ceres-solver-sys/Cargo.toml b/ceres-solver-sys/Cargo.toml
index 098d018..e809ea0 100644
--- a/ceres-solver-sys/Cargo.toml
+++ b/ceres-solver-sys/Cargo.toml
@@ -25,7 +25,7 @@ features = ["c++17"]
 
 [build-dependencies]
 cmake = "0.1"
-cxx-build = "1,<=1.0.129"  # 1.0.130 requires MSRV 1.70
+cxx-build = "1, <=1.0.161"  # 1.0.130 requires MSRV 1.70
 pkg-config = { version = "0.3", optional = true }
 
 [dev-dependencies]