diff --git a/instant-segment-py/Cargo.toml b/instant-segment-py/Cargo.toml
index 19b36a3..4c3efa7 100644
--- a/instant-segment-py/Cargo.toml
+++ b/instant-segment-py/Cargo.toml
@@ -20,7 +20,7 @@ ahash = "0.7.2"
 bincode = "1.3.2"
 instant-segment = { version = "0.8.2", path = "../instant-segment", features = ["with-serde"] }
 pyo3 = { version = "0.15.0", features = ["extension-module"] }
-smartstring = "0.2.6"
+smartstring = "1"
 
 [package.metadata.maturin]
 name = "instant-segment"
diff --git a/instant-segment/Cargo.toml b/instant-segment/Cargo.toml
index 406a33b..b85bc51 100644
--- a/instant-segment/Cargo.toml
+++ b/instant-segment/Cargo.toml
@@ -17,7 +17,7 @@ with-serde = ["serde", "ahash/serde", "smartstring/serde"]
 
 [dependencies]
 ahash = "0.7.0"
-smartstring = "0.2.5"
+smartstring = "1"
 serde = { version = "1.0.123", features = ["derive"], optional = true }
 
 [dev-dependencies]