diff --git a/fuzz/Cargo.toml b/fuzz/Cargo.toml
index 56ee3fc..1d1114e 100644
--- a/fuzz/Cargo.toml
+++ b/fuzz/Cargo.toml
@@ -8,7 +8,7 @@ edition = "2021"
 cargo-fuzz = true
 
 [dependencies]
-libfuzzer-sys = "0.4"
+libfuzzer-sys = "0.4.13"
 
 [dependencies.irtt-proto]
 path = "../crates/irtt-proto"