diff --git a/Cargo.lock b/Cargo.lock
index a4d3ec78d70b35b04c4bbcd43a508918726f7f93..e87ba3c070dc16d13178610a41790e2ad91c4900 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2772,18 +2772,18 @@ dependencies = [
 
 [[package]]
 name = "serde"
-version = "1.0.128"
+version = "1.0.129"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1056a0db1978e9dbf0f6e4fca677f6f9143dc1c19de346f22cac23e422196834"
+checksum = "d1f72836d2aa753853178eda473a3b9d8e4eefdaf20523b919677e6de489f8f1"
 dependencies = [
  "serde_derive",
 ]
 
 [[package]]
 name = "serde_derive"
-version = "1.0.128"
+version = "1.0.129"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "13af2fbb8b60a8950d6c72a56d2095c28870367cc8e10c55e9745bac4995a2c4"
+checksum = "e57ae87ad533d9a56427558b516d0adac283614e347abf85b0dc0cbbf0a249f3"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/Cargo.toml b/Cargo.toml
index e316bd8d77961431d24257295462bdcf3d5aeb5f..0aa6a1f6a003f070d5e6ab080669894b7d365080 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -35,7 +35,7 @@ rustc_version = "0.4.0"
 blake2 = "0.9.1"
 contract-metadata = { version = "0.3.0", path = "./metadata" }
 semver = { version = "1.0.4", features = ["serde"] }
-serde = { version = "1.0.128", default-features = false, features = ["derive"] }
+serde = { version = "1.0.129", default-features = false, features = ["derive"] }
 serde_json = "1.0.66"
 tempfile = "3.2.0"
 url = { version = "2.2.2", features = ["serde"] }
diff --git a/metadata/Cargo.toml b/metadata/Cargo.toml
index 9a79a274d1e74e57eddd828fdb130feb9283a6ad..8f653743e8bff0a8af85afb36cd00fe013751c7f 100644
--- a/metadata/Cargo.toml
+++ b/metadata/Cargo.toml
@@ -18,7 +18,7 @@ path = "lib.rs"
 
 [dependencies]
 semver = { version = "1.0.4", features = ["serde"] }
-serde = { version = "1.0.128", default-features = false, features = ["derive"] }
+serde = { version = "1.0.129", default-features = false, features = ["derive"] }
 serde_json = "1.0.66"
 url = { version = "2.2.2", features = ["serde"] }