diff --git a/linkerd/proxy/http/fuzz/Cargo.lock b/linkerd/proxy/http/fuzz/Cargo.lock
index 205bf3f1d6..a697a8b69d 100644
--- a/linkerd/proxy/http/fuzz/Cargo.lock
+++ b/linkerd/proxy/http/fuzz/Cargo.lock
@@ -402,12 +402,13 @@ checksum = "9385f66bf6105b241aa65a61cb923ef20efc665cb9f9bb50ac2f0c4b7f378d41"
 
 [[package]]
 name = "libfuzzer-sys"
-version = "0.4.0"
+version = "0.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "86c975d637bc2a2f99440932b731491fc34c7f785d239e38af3addd3c2fd0e46"
+checksum = "36a9a84a6e8b55dfefb04235e55edb2b9a2a18488fcae777a6bdaa6f06f1deb3"
 dependencies = [
  "arbitrary",
  "cc",
+ "once_cell",
 ]
 
 [[package]]