diff --git a/bin/fuzz/Cargo.lock b/bin/fuzz/Cargo.lock
index 95887d59e2..d620377858 100644
--- a/bin/fuzz/Cargo.lock
+++ b/bin/fuzz/Cargo.lock
@@ -65,9 +65,9 @@ checksum = "08f9b8508dccb7687a1d6c4ce66b2b0ecef467c94667de27d8d7fe1f8d2a9cdc"
 
 [[package]]
 name = "arbitrary"
-version = "1.1.4"
+version = "1.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8931eb436ab9bf1980c6cb2b9d1ba5390cd6793b2c6e2d2ea8147da3570c2a2e"
+checksum = "5b0d87f4e4aaa9f3a00706edc7cbbeab0e3cc45ff1062b1160bc0204d6481ad4"
 
 [[package]]
 name = "arrayref"
@@ -1731,9 +1731,9 @@ dependencies = [
 
 [[package]]
 name = "sha2"
-version = "0.10.3"
+version = "0.10.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "899bf02746a2c92bf1053d9327dadb252b01af1f81f90cdb902411f518bc7215"
+checksum = "cf9db03534dff993187064c4e0c05a5708d2a9728ace9a8959b77bedf415dac5"
 dependencies = [
  "cfg-if",
  "cpufeatures",
@@ -1769,11 +1769,12 @@ checksum = "2fd0db749597d91ff862fd1d55ea87f7855a744a8425a64695b6fca237d1dad1"
 
 [[package]]
 name = "smoldot"
-version = "0.3.0"
+version = "0.4.0"
 dependencies = [
  "arrayvec 0.7.2",
  "async-std",
  "atomic",
+ "base64",
  "bip39",
  "blake2-rfc",
  "bs58",
@@ -1805,7 +1806,7 @@ dependencies = [
  "schnorrkel",
  "serde",
  "serde_json",
- "sha2 0.10.3",
+ "sha2 0.10.5",
  "siphasher",
  "slab",
  "smallvec",
@@ -1841,7 +1842,7 @@ dependencies = [
  "curve25519-dalek 4.0.0-pre.1",
  "rand_core 0.6.3",
  "rustc_version",
- "sha2 0.10.3",
+ "sha2 0.10.5",
  "subtle",
 ]
 
diff --git a/bin/fuzz/Cargo.toml b/bin/fuzz/Cargo.toml
index 1cfd4fa2a0..9e3f6dc620 100644
--- a/bin/fuzz/Cargo.toml
+++ b/bin/fuzz/Cargo.toml
@@ -9,7 +9,7 @@ edition = "2018"
 cargo-fuzz = true
 
 [dependencies]
-arbitrary = "1.1.4"
+arbitrary = "1.1.5"
 fnv = { version = "1.0.7", default-features = false }
 hashbrown = { version = "0.12.3", default-features = false }
 libfuzzer-sys = "0.4"