diff --git a/Cargo.lock b/Cargo.lock
index 92329b9c4dedd8d5198016738fc5ac4099454ad3..6032869c1019a7c663bad8d0f68d6ede5f9a35ff 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2705,11 +2705,11 @@ checksum = "3e75f6a532d0fd9f7f13144f392b6ad56a32696bfcd9c78f797f16bbb6f072d6"
 
 [[package]]
 name = "rustc_version"
-version = "0.3.3"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f0dfe2087c51c460008730de8b57e6a320782fbfb312e1f4d520e6c6fae155ee"
+checksum = "bfa0f585226d2e68097d4f95d113b15b83a82e819ab25717ec0590d9584ef366"
 dependencies = [
- "semver 0.11.0",
+ "semver 1.0.3",
 ]
 
 [[package]]
diff --git a/Cargo.toml b/Cargo.toml
index 0ab4bf4eaf55477a2470bfd26c85e977417d0f32..48f5178faa031d57e1392a34ca418dac838dbafc 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -32,7 +32,7 @@ codec = { package = "parity-scale-codec", version = "2.1", features = ["derive"]
 which = "4.1.0"
 colored = "2.0.0"
 toml = "0.5.8"
-rustc_version = "0.3.3"
+rustc_version = "0.4.0"
 blake2 = "0.9.1"
 contract-metadata = { version = "0.2.0", path = "./metadata" }
 semver = { version = "1.0.3", features = ["serde"] }