diff --git a/fuzz/Cargo.toml b/fuzz/Cargo.toml
index c1bebc9..650e1d4 100644
--- a/fuzz/Cargo.toml
+++ b/fuzz/Cargo.toml
@@ -9,7 +9,7 @@ edition = "2018"
 cargo-fuzz = true
 
 [dependencies]
-libfuzzer-sys = "0.3"
+libfuzzer-sys = "0.4"
 diffutils = { path = "../" }
 
 # Prevent this from interfering with workspaces