diff --git a/Cargo.lock b/Cargo.lock
index dec8e7bc2..5b261dc10 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -155,7 +155,7 @@ version = "0.2.0"
 dependencies = [
  "ethbloom 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc-serialize 0.3.24 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustc-hex 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
diff --git a/util/bloomchain/Cargo.toml b/util/bloomchain/Cargo.toml
index ebd54f080..ea3022cea 100644
--- a/util/bloomchain/Cargo.toml
+++ b/util/bloomchain/Cargo.toml
@@ -11,5 +11,5 @@ keywords = ["ethereum", "ethcore", "bloom", "chain", "filter"]
 ethbloom = "0.3"
 
 [dev-dependencies]
-rustc-serialize = "0.3"
+rustc-hex = "1.0"
 rand = "0.4"
diff --git a/util/bloomchain/tests/bloomchain.rs b/util/bloomchain/tests/bloomchain.rs
index 97f18f8ac..4a77407a7 100644
--- a/util/bloomchain/tests/bloomchain.rs
+++ b/util/bloomchain/tests/bloomchain.rs
@@ -1,5 +1,5 @@
 extern crate bloomchain;
-extern crate rustc_serialize;
+extern crate rustc_hex;
 
 mod util;
 
@@ -53,7 +53,7 @@ fn partly_matching_bloom_searach() {
 
 	db.insert_blooms(modified_blooms_1);
 
-	
+
 	let chain = BloomChain::new(config, &db);
 	assert_eq!(chain.with_bloom(&(0..100), &bloom2), vec![14, 15]);
 }
@@ -68,7 +68,7 @@ fn bloom_replace() {
 	let bloom3 = Bloom::from_hex("00010000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000");
 	let bloom4 = Bloom::from_hex("00001000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000");
 	let bloom5 = Bloom::from_hex("00000100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000");
-	
+
 	let modified_blooms_0 = {
 		let chain = BloomChain::new(config, &db);
 		let block_number = 14;
diff --git a/util/bloomchain/tests/groupchain.rs b/util/bloomchain/tests/groupchain.rs
index ded3b8ac7..ec396346a 100644
--- a/util/bloomchain/tests/groupchain.rs
+++ b/util/bloomchain/tests/groupchain.rs
@@ -1,5 +1,5 @@
 extern crate bloomchain;
-extern crate rustc_serialize;
+extern crate rustc_hex;
 
 mod util;
 
@@ -55,7 +55,7 @@ fn partly_matching_bloom_group_searach() {
 
 	db.insert_blooms(modified_blooms_1);
 
-	
+
 	let chain = BloomGroupChain::new(config, &db);
 	assert_eq!(chain.with_bloom(&(0..100), &bloom2), vec![14, 15]);
 }
@@ -70,7 +70,7 @@ fn bloom_group_replace() {
 	let bloom3 = Bloom::from_hex("00010000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000");
 	let bloom4 = Bloom::from_hex("00001000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000");
 	let bloom5 = Bloom::from_hex("00000100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000");
-	
+
 	let modified_blooms_0 = {
 		let chain = BloomGroupChain::new(config, &db);
 		let block_number = 14;
diff --git a/util/bloomchain/tests/util/from_hex.rs b/util/bloomchain/tests/util/from_hex.rs
index 029334879..9152d304f 100644
--- a/util/bloomchain/tests/util/from_hex.rs
+++ b/util/bloomchain/tests/util/from_hex.rs
@@ -1,4 +1,4 @@
-use rustc_serialize::hex::FromHex as RustcFromHex;
+use rustc_hex::FromHex as RustcFromHex;
 use bloomchain::Bloom;
 
 pub trait FromHex {