diff --git a/Cargo.toml b/Cargo.toml
index 68747e9a..372ac2af 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -42,7 +42,7 @@ nonempty = "0.7"
 serde = { version = "1.0", features = ["derive"] }
 subtle = "2.3"
 zcash_note_encryption = "0.3"
-incrementalmerkletree = "0.3"
+incrementalmerkletree = "0.3.1"
 
 # Logging
 tracing = "0.1"