diff --git a/fuzz/Cargo.lock b/fuzz/Cargo.lock
index 0c18f8bec..e3f9408be 100644
--- a/fuzz/Cargo.lock
+++ b/fuzz/Cargo.lock
@@ -30,9 +30,9 @@ version = "0.1.0"
 
 [[package]]
 name = "arbitrary"
-version = "0.4.7"
+version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "db55d72333851e17d572bec876e390cd3b11eb1ef53ae821dd9f3b653d2b4569"
+checksum = "698b65a961a9d730fb45b6b0327e20207810c9f61ee421b082b27ba003f49e2b"
 
 [[package]]
 name = "arc-swap"
@@ -322,9 +322,9 @@ checksum = "b7282d924be3275cec7f6756ff4121987bc6481325397dde6ba3e7802b1a8b1c"
 
 [[package]]
 name = "libfuzzer-sys"
-version = "0.3.5"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fcf184a4b6b274f82a5df6b357da6055d3e82272327bba281c28bbba6f1664ef"
+checksum = "86c975d637bc2a2f99440932b731491fc34c7f785d239e38af3addd3c2fd0e46"
 dependencies = [
  "arbitrary",
  "cc",
diff --git a/fuzz/Cargo.toml b/fuzz/Cargo.toml
index 252f84bf9..34d6d5dcd 100644
--- a/fuzz/Cargo.toml
+++ b/fuzz/Cargo.toml
@@ -11,7 +11,7 @@ cargo-fuzz = true
 [dependencies]
 block_util = { path = "../block_util" }
 libc = "0.2.72"
-libfuzzer-sys = "0.3"
+libfuzzer-sys = "0.4"
 qcow = { path = "../qcow" }
 seccomp = { git = "https://github.com/firecracker-microvm/firecracker", tag = "v0.22.0" }
 virtio-devices = { path = "../virtio-devices" }