diff --git a/Cargo.lock b/Cargo.lock
index ac797cc183..7400b422eb 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -583,7 +583,7 @@ version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4b9434b9a5aa1450faa3f9cb14ea0e8c53bb5d2b3c1bfd1ab4fc03e9f33fbfb0"
 dependencies = [
- "rustc_version",
+ "rustc_version 0.2.3",
 ]
 
 [[package]]
@@ -2868,7 +2868,7 @@ checksum = "f842b1982eb6c2fe34036a4fbfb06dd185a3f5c8edfaacdf7d1ea10b07de6252"
 dependencies = [
  "lock_api 0.3.4",
  "parking_lot_core 0.6.2",
- "rustc_version",
+ "rustc_version 0.2.3",
 ]
 
 [[package]]
@@ -2902,7 +2902,7 @@ dependencies = [
  "cloudabi 0.0.3",
  "libc",
  "redox_syscall 0.1.56",
- "rustc_version",
+ "rustc_version 0.2.3",
  "smallvec 0.6.14",
  "winapi 0.3.8",
 ]
@@ -3692,6 +3692,15 @@ dependencies = [
  "semver 0.9.0",
 ]
 
+[[package]]
+name = "rustc_version"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bfa0f585226d2e68097d4f95d113b15b83a82e819ab25717ec0590d9584ef366"
+dependencies = [
+ "semver 1.0.3",
+]
+
 [[package]]
 name = "rustls"
 version = "0.19.0"
@@ -3820,6 +3829,12 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "semver"
+version = "1.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5f3aac57ee7f3272d8395c6e4f502f434f0e289fcd62876f70daa008c20dcabe"
+
 [[package]]
 name = "semver-parser"
 version = "0.7.0"
@@ -4520,7 +4535,7 @@ dependencies = [
  "rayon",
  "reqwest",
  "retain_mut",
- "rustc_version",
+ "rustc_version 0.4.0",
  "serde",
  "serde_bytes",
  "serde_derive",
@@ -4675,7 +4690,7 @@ dependencies = [
  "generic-array 0.14.4",
  "log 0.4.11",
  "memmap2 0.1.0",
- "rustc_version",
+ "rustc_version 0.2.3",
  "serde",
  "serde_derive",
  "sha2 0.9.5",
@@ -4693,7 +4708,7 @@ dependencies = [
  "generic-array 0.14.4",
  "log 0.4.11",
  "memmap2 0.2.3",
- "rustc_version",
+ "rustc_version 0.4.0",
  "serde",
  "serde_derive",
  "sha2 0.9.5",
@@ -4711,7 +4726,7 @@ dependencies = [
  "lazy_static",
  "proc-macro2 1.0.24",
  "quote 1.0.6",
- "rustc_version",
+ "rustc_version 0.2.3",
  "syn 1.0.60",
 ]
 
@@ -4721,7 +4736,7 @@ version = "1.8.0"
 dependencies = [
  "proc-macro2 1.0.24",
  "quote 1.0.6",
- "rustc_version",
+ "rustc_version 0.4.0",
  "syn 1.0.60",
 ]
 
@@ -4775,7 +4790,7 @@ dependencies = [
  "rand 0.7.3",
  "rand_chacha 0.2.2",
  "rayon",
- "rustc_version",
+ "rustc_version 0.4.0",
  "serde",
  "serde_bytes",
  "serde_derive",
@@ -4876,7 +4891,7 @@ dependencies = [
  "rayon",
  "reed-solomon-erasure",
  "rocksdb",
- "rustc_version",
+ "rustc_version 0.4.0",
  "serde",
  "serde_bytes",
  "sha2 0.9.5",
@@ -5189,7 +5204,7 @@ dependencies = [
  "num-derive",
  "num-traits",
  "rand 0.7.3",
- "rustc_version",
+ "rustc_version 0.2.3",
  "rustversion",
  "serde",
  "serde_bytes",
@@ -5221,7 +5236,7 @@ dependencies = [
  "num-derive",
  "num-traits",
  "rand 0.7.3",
- "rustc_version",
+ "rustc_version 0.4.0",
  "rustversion",
  "serde",
  "serde_bytes",
@@ -5366,7 +5381,7 @@ dependencies = [
  "rand 0.7.3",
  "rayon",
  "regex",
- "rustc_version",
+ "rustc_version 0.4.0",
  "serde",
  "serde_derive",
  "solana-config-program",
@@ -5426,7 +5441,7 @@ dependencies = [
  "rand 0.7.3",
  "rand_chacha 0.2.2",
  "rand_core 0.6.2",
- "rustc_version",
+ "rustc_version 0.4.0",
  "rustversion",
  "serde",
  "serde_bytes",
@@ -5529,7 +5544,7 @@ dependencies = [
  "log 0.4.11",
  "num-derive",
  "num-traits",
- "rustc_version",
+ "rustc_version 0.4.0",
  "serde",
  "serde_derive",
  "solana-config-program",
@@ -5742,7 +5757,7 @@ name = "solana-version"
 version = "1.8.0"
 dependencies = [
  "log 0.4.11",
- "rustc_version",
+ "rustc_version 0.4.0",
  "serde",
  "serde_derive",
  "solana-frozen-abi 1.8.0",
@@ -5759,7 +5774,7 @@ dependencies = [
  "log 0.4.11",
  "num-derive",
  "num-traits",
- "rustc_version",
+ "rustc_version 0.4.0",
  "serde",
  "serde_derive",
  "solana-frozen-abi 1.8.0",
@@ -5874,7 +5889,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d022496b16281348b52d0e30ae99e01a73d737b2f45d38fed4edf79f9325a1d5"
 dependencies = [
  "discard",
- "rustc_version",
+ "rustc_version 0.2.3",
  "stdweb-derive",
  "stdweb-internal-macros",
  "stdweb-internal-runtime",
diff --git a/core/Cargo.toml b/core/Cargo.toml
index 11778200bc..bcf7b0fe1c 100644
--- a/core/Cargo.toml
+++ b/core/Cargo.toml
@@ -86,7 +86,7 @@ systemstat = "0.1.7"
 tokio_02 = { version = "0.2", package = "tokio", features = ["full"] }
 
 [build-dependencies]
-rustc_version = "0.2"
+rustc_version = "0.4"
 
 [[bench]]
 name = "banking_stage"
diff --git a/frozen-abi/Cargo.toml b/frozen-abi/Cargo.toml
index fe0a2cbce2..4c3f9498e3 100644
--- a/frozen-abi/Cargo.toml
+++ b/frozen-abi/Cargo.toml
@@ -25,4 +25,4 @@ generic-array = { version = "0.14.4", default-features = false, features = ["ser
 memmap2 = "0.2.3"
 
 [build-dependencies]
-rustc_version = "0.2"
+rustc_version = "0.4"
diff --git a/frozen-abi/macro/Cargo.toml b/frozen-abi/macro/Cargo.toml
index 6288a59c05..8ff95d1445 100644
--- a/frozen-abi/macro/Cargo.toml
+++ b/frozen-abi/macro/Cargo.toml
@@ -18,4 +18,4 @@ quote = "1.0"
 syn = { version = "1.0", features = ["full", "extra-traits"] }
 
 [build-dependencies]
-rustc_version = "0.2"
+rustc_version = "0.4"
diff --git a/gossip/Cargo.toml b/gossip/Cargo.toml
index 94e2f7fe03..81b98186ea 100644
--- a/gossip/Cargo.toml
+++ b/gossip/Cargo.toml
@@ -49,7 +49,7 @@ num_cpus = "1.13.0"
 serial_test = "0.5.1"
 
 [build-dependencies]
-rustc_version = "0.2"
+rustc_version = "0.4"
 
 [[bench]]
 name = "crds"
diff --git a/ledger/Cargo.toml b/ledger/Cargo.toml
index 270a937c97..4c9807ff9b 100644
--- a/ledger/Cargo.toml
+++ b/ledger/Cargo.toml
@@ -77,7 +77,7 @@ solana-account-decoder = { path = "../account-decoder", version = "=1.8.0" }
 solana-stake-program = { path = "../programs/stake", version = "=1.8.0" }
 
 [build-dependencies]
-rustc_version = "0.2"
+rustc_version = "0.4"
 
 [lib]
 crate-type = ["lib"]
diff --git a/programs/bpf/Cargo.lock b/programs/bpf/Cargo.lock
index 2404b6ce41..3265ac7b6e 100644
--- a/programs/bpf/Cargo.lock
+++ b/programs/bpf/Cargo.lock
@@ -1971,7 +1971,7 @@ checksum = "f842b1982eb6c2fe34036a4fbfb06dd185a3f5c8edfaacdf7d1ea10b07de6252"
 dependencies = [
  "lock_api 0.3.4",
  "parking_lot_core 0.6.2",
- "rustc_version",
+ "rustc_version 0.2.3",
 ]
 
 [[package]]
@@ -2005,7 +2005,7 @@ dependencies = [
  "cloudabi",
  "libc",
  "redox_syscall 0.1.56",
- "rustc_version",
+ "rustc_version 0.2.3",
  "smallvec 0.6.14",
  "winapi 0.3.8",
 ]
@@ -2442,6 +2442,15 @@ dependencies = [
  "semver 0.9.0",
 ]
 
+[[package]]
+name = "rustc_version"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bfa0f585226d2e68097d4f95d113b15b83a82e819ab25717ec0590d9584ef366"
+dependencies = [
+ "semver 1.0.3",
+]
+
 [[package]]
 name = "rustls"
 version = "0.19.0"
@@ -2563,6 +2572,12 @@ dependencies = [
  "semver-parser 0.10.2",
 ]
 
+[[package]]
+name = "semver"
+version = "1.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5f3aac57ee7f3272d8395c6e4f502f434f0e289fcd62876f70daa008c20dcabe"
+
 [[package]]
 name = "semver-parser"
 version = "0.7.0"
@@ -3260,7 +3275,7 @@ dependencies = [
  "generic-array 0.14.4",
  "log",
  "memmap2 0.1.0",
- "rustc_version",
+ "rustc_version 0.2.3",
  "serde",
  "serde_derive",
  "sha2",
@@ -3278,7 +3293,7 @@ dependencies = [
  "generic-array 0.14.4",
  "log",
  "memmap2 0.2.3",
- "rustc_version",
+ "rustc_version 0.4.0",
  "serde",
  "serde_derive",
  "sha2",
@@ -3296,7 +3311,7 @@ dependencies = [
  "lazy_static",
  "proc-macro2 1.0.24",
  "quote 1.0.6",
- "rustc_version",
+ "rustc_version 0.2.3",
  "syn 1.0.67",
 ]
 
@@ -3306,7 +3321,7 @@ version = "1.8.0"
 dependencies = [
  "proc-macro2 1.0.24",
  "quote 1.0.6",
- "rustc_version",
+ "rustc_version 0.4.0",
  "syn 1.0.67",
 ]
 
@@ -3389,7 +3404,7 @@ dependencies = [
  "num-derive",
  "num-traits",
  "rand 0.7.3",
- "rustc_version",
+ "rustc_version 0.2.3",
  "rustversion",
  "serde",
  "serde_bytes",
@@ -3420,7 +3435,7 @@ dependencies = [
  "num-derive",
  "num-traits",
  "rand 0.7.3",
- "rustc_version",
+ "rustc_version 0.4.0",
  "rustversion",
  "serde",
  "serde_bytes",
@@ -3513,7 +3528,7 @@ dependencies = [
  "rand 0.7.3",
  "rayon",
  "regex",
- "rustc_version",
+ "rustc_version 0.4.0",
  "serde",
  "serde_derive",
  "solana-config-program",
@@ -3563,7 +3578,7 @@ dependencies = [
  "rand 0.7.3",
  "rand_chacha 0.2.2",
  "rand_core 0.6.2",
- "rustc_version",
+ "rustc_version 0.4.0",
  "rustversion",
  "serde",
  "serde_bytes",
@@ -3626,7 +3641,7 @@ dependencies = [
  "log",
  "num-derive",
  "num-traits",
- "rustc_version",
+ "rustc_version 0.4.0",
  "serde",
  "serde_derive",
  "solana-config-program",
@@ -3666,7 +3681,7 @@ name = "solana-version"
 version = "1.8.0"
 dependencies = [
  "log",
- "rustc_version",
+ "rustc_version 0.4.0",
  "serde",
  "serde_derive",
  "solana-frozen-abi 1.8.0",
@@ -3683,7 +3698,7 @@ dependencies = [
  "log",
  "num-derive",
  "num-traits",
- "rustc_version",
+ "rustc_version 0.4.0",
  "serde",
  "serde_derive",
  "solana-frozen-abi 1.8.0",
diff --git a/programs/stake/Cargo.toml b/programs/stake/Cargo.toml
index 22fc357d5a..c0c8404021 100644
--- a/programs/stake/Cargo.toml
+++ b/programs/stake/Cargo.toml
@@ -28,7 +28,7 @@ thiserror = "1.0"
 solana-logger = { path = "../../logger", version = "=1.8.0" }
 
 [build-dependencies]
-rustc_version = "0.2"
+rustc_version = "0.4"
 
 [lib]
 crate-type = ["lib"]
diff --git a/programs/vote/Cargo.toml b/programs/vote/Cargo.toml
index 27c0d494f6..5f6cfece76 100644
--- a/programs/vote/Cargo.toml
+++ b/programs/vote/Cargo.toml
@@ -24,7 +24,7 @@ solana-sdk = { path = "../../sdk", version = "=1.8.0" }
 thiserror = "1.0"
 
 [build-dependencies]
-rustc_version = "0.2"
+rustc_version = "0.4"
 
 [lib]
 crate-type = ["lib"]
diff --git a/runtime/Cargo.toml b/runtime/Cargo.toml
index 75cc9b4cbf..7c8268ee18 100644
--- a/runtime/Cargo.toml
+++ b/runtime/Cargo.toml
@@ -65,4 +65,4 @@ solana-noop-program = { path = "../programs/noop", version = "=1.8.0" }
 targets = ["x86_64-unknown-linux-gnu"]
 
 [build-dependencies]
-rustc_version = "0.2"
+rustc_version = "0.4"
diff --git a/sdk/Cargo.toml b/sdk/Cargo.toml
index a6a80ed4c8..ee0d0908c6 100644
--- a/sdk/Cargo.toml
+++ b/sdk/Cargo.toml
@@ -84,7 +84,7 @@ curve25519-dalek = "2.1.0"
 tiny-bip39 = "0.7.0"
 
 [build-dependencies]
-rustc_version = "0.2"
+rustc_version = "0.4"
 
 [package.metadata.docs.rs]
 targets = ["x86_64-unknown-linux-gnu"]
diff --git a/sdk/program/Cargo.toml b/sdk/program/Cargo.toml
index d19ebbfdb0..8a4e4cf966 100755
--- a/sdk/program/Cargo.toml
+++ b/sdk/program/Cargo.toml
@@ -45,7 +45,7 @@ bincode = "1.3.1"
 serde_json = "1.0.56"
 
 [build-dependencies]
-rustc_version = "0.2"
+rustc_version = "0.4"
 
 [package.metadata.docs.rs]
 targets = ["x86_64-unknown-linux-gnu"]
diff --git a/version/Cargo.toml b/version/Cargo.toml
index 39f27b0e0e..562116bfd5 100644
--- a/version/Cargo.toml
+++ b/version/Cargo.toml
@@ -25,4 +25,4 @@ name = "solana_version"
 targets = ["x86_64-unknown-linux-gnu"]
 
 [build-dependencies]
-rustc_version = "0.2"
+rustc_version = "0.4"