diff --git a/Cargo.toml b/Cargo.toml
index 17110a3..4f4af89 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -56,7 +56,7 @@ chrono = { version = "0.4.31", optional = true, default-features = false, featur
     "std",
     "clock",
 ] }
-chrono-tz = { version = ">=0.6, <0.10.0", optional = true }
+chrono-tz = { version = ">=0.6, <0.11.0", optional = true }
 chronoutil = { version = "0.2", optional = true }
 duration-str = { version = "0.11", optional = true, default-features = false }