diff --git a/fuzz/Cargo.toml b/fuzz/Cargo.toml
index bcbc3aad25..d15c9a9f7f 100644
--- a/fuzz/Cargo.toml
+++ b/fuzz/Cargo.toml
@@ -10,7 +10,7 @@ edition = "2018"
 cargo-fuzz = true
 
 [dependencies]
-libfuzzer-sys = "0.3"
+libfuzzer-sys = "0.4"
 
 [dependencies.chrono]
 path = ".."