diff --git a/Cargo.toml b/Cargo.toml
index 58b637f..b8ba2ef 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -29,7 +29,7 @@ serde_json = { version = "1.0", features = ["preserve_order"] }
 serde = { version = "1.0", default-features = false, features = ["derive"] }
 
 [dependencies]
-geo = "0.30"
+geo = "0.31"
 thiserror = "2"
 itertools = "0.14.0"
 num-integer = "0.1.44" # TODO: see if we can get rid of div_ceil