diff --git a/Cargo.lock b/Cargo.lock
index eae7710f53fb28d279f8413f99ecf016e21a20f6..0642209eb9cf147be71b762f2c2e966180a4ffe6 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2852,18 +2852,18 @@ dependencies = [
 
 [[package]]
 name = "serde"
-version = "1.0.134"
+version = "1.0.135"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "96b3c34c1690edf8174f5b289a336ab03f568a4460d8c6df75f2f3a692b3bc6a"
+checksum = "2cf9235533494ea2ddcdb794665461814781c53f19d87b76e571a1c35acbad2b"
 dependencies = [
  "serde_derive",
 ]
 
 [[package]]
 name = "serde_derive"
-version = "1.0.134"
+version = "1.0.135"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "784ed1fbfa13fe191077537b0d70ec8ad1e903cfe04831da608aa36457cb653d"
+checksum = "8dcde03d87d4c973c04be249e7d8f0b35db1c848c487bd43032808e59dd8328d"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/Cargo.toml b/Cargo.toml
index b02c90b6f9f6a1e92048e551f38033420a0c78d8..258a33e5599beefea2f44c93fc034031300175b2 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -36,7 +36,7 @@ rustc_version = "0.4.0"
 blake2 = "0.10.2"
 contract-metadata = { version = "0.5.0", path = "./metadata" }
 semver = { version = "1.0.4", features = ["serde"] }
-serde = { version = "1.0.134", default-features = false, features = ["derive"] }
+serde = { version = "1.0.135", default-features = false, features = ["derive"] }
 serde_json = "1.0.75"
 tempfile = "3.3.0"
 url = { version = "2.2.2", features = ["serde"] }
diff --git a/metadata/Cargo.toml b/metadata/Cargo.toml
index 165954072174b74cec6e19bceb46f7b7f08feccc..de5690fc525c49a4ea26dfad92dcd844c04da815 100644
--- a/metadata/Cargo.toml
+++ b/metadata/Cargo.toml
@@ -20,7 +20,7 @@ path = "lib.rs"
 [dependencies]
 impl-serde = "0.3.2"
 semver = { version = "1.0.4", features = ["serde"] }
-serde = { version = "1.0.134", default-features = false, features = ["derive"] }
+serde = { version = "1.0.135", default-features = false, features = ["derive"] }
 serde_json = "1.0.75"
 url = { version = "2.2.2", features = ["serde"] }