diff --git a/components/servo/Cargo.lock b/components/servo/Cargo.lock
index ade64f4a378..c77773b52ae 100644
--- a/components/servo/Cargo.lock
+++ b/components/servo/Cargo.lock
@@ -113,9 +113,9 @@ dependencies = [
 [[package]]
 name = "bincode"
 version = "0.4.0"
-source = "git+https://github.com/TyOverby/bincode#c1d94fe8590a91c1f5f163d7d3f23df2c84f0d21"
+source = "git+https://github.com/TyOverby/bincode#590a862b4368910a5285ca8e970163f21a752b8d"
 dependencies = [
- "byteorder 0.3.13 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "num 0.1.28 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-serialize 0.3.16 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -136,11 +136,6 @@ name = "brotli"
 version = "0.3.17"
 source = "git+https://github.com/ende76/brotli-rs#4a8c42cce771ded65fe64d6816f5d7303006b2ea"
 
-[[package]]
-name = "byteorder"
-version = "0.3.13"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
 [[package]]
 name = "byteorder"
 version = "0.4.2"
diff --git a/ports/cef/Cargo.lock b/ports/cef/Cargo.lock
index 21331e2b8d3..ce4b2c17921 100644
--- a/ports/cef/Cargo.lock
+++ b/ports/cef/Cargo.lock
@@ -102,9 +102,9 @@ dependencies = [
 [[package]]
 name = "bincode"
 version = "0.4.0"
-source = "git+https://github.com/TyOverby/bincode#c1d94fe8590a91c1f5f163d7d3f23df2c84f0d21"
+source = "git+https://github.com/TyOverby/bincode#590a862b4368910a5285ca8e970163f21a752b8d"
 dependencies = [
- "byteorder 0.3.13 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "num 0.1.28 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-serialize 0.3.16 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -125,11 +125,6 @@ name = "brotli"
 version = "0.3.17"
 source = "git+https://github.com/ende76/brotli-rs#4a8c42cce771ded65fe64d6816f5d7303006b2ea"
 
-[[package]]
-name = "byteorder"
-version = "0.3.13"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
 [[package]]
 name = "byteorder"
 version = "0.4.2"
diff --git a/ports/gonk/Cargo.lock b/ports/gonk/Cargo.lock
index c8fa85c7054..9d6127f77c9 100644
--- a/ports/gonk/Cargo.lock
+++ b/ports/gonk/Cargo.lock
@@ -93,9 +93,9 @@ dependencies = [
 [[package]]
 name = "bincode"
 version = "0.4.0"
-source = "git+https://github.com/TyOverby/bincode#c1d94fe8590a91c1f5f163d7d3f23df2c84f0d21"
+source = "git+https://github.com/TyOverby/bincode#590a862b4368910a5285ca8e970163f21a752b8d"
 dependencies = [
- "byteorder 0.3.13 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "num 0.1.28 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-serialize 0.3.16 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -116,11 +116,6 @@ name = "brotli"
 version = "0.3.17"
 source = "git+https://github.com/ende76/brotli-rs#4a8c42cce771ded65fe64d6816f5d7303006b2ea"
 
-[[package]]
-name = "byteorder"
-version = "0.3.13"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
 [[package]]
 name = "byteorder"
 version = "0.4.2"
diff --git a/python/tidy.py b/python/tidy.py
index ac47ffb76be..645749750aa 100644
--- a/python/tidy.py
+++ b/python/tidy.py
@@ -170,7 +170,7 @@ def check_lock(file_name, contents):
         raise StopIteration
 
     # package names to be neglected (as named by cargo)
-    exceptions = ["libc", "byteorder", "cocoa"]
+    exceptions = ["libc", "cocoa"]
 
     import toml
     content = toml.loads(contents)