diff --git a/Cargo.lock b/Cargo.lock
index 12d044ef8..2c7e3d8c2 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1578,7 +1578,7 @@ dependencies = [
 
 [[package]]
 name = "jsonrpc-ws-server"
-version = "13.0.0"
+version = "13.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "jsonrpc-core 13.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1586,7 +1586,7 @@ dependencies = [
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "parking_lot 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "slab 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "ws 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "ws 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1647,7 +1647,7 @@ name = "lazy_static"
 version = "1.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "spin 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "spin 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -2303,7 +2303,7 @@ dependencies = [
  "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
  "protobuf 2.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "quick-error 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "spin 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "spin 0.4.10 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -3280,7 +3280,7 @@ dependencies = [
  "jsonrpc-derive 13.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "jsonrpc-http-server 13.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "jsonrpc-pubsub 13.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "jsonrpc-ws-server 13.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "jsonrpc-ws-server 13.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "matches 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -5168,23 +5168,6 @@ dependencies = [
  "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
-[[package]]
-name = "ws"
-version = "0.8.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "bytes 0.4.12 (registry+https://github.com/rust-lang/crates.io-index)",
- "httparse 1.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "mio 0.6.19 (registry+https://github.com/rust-lang/crates.io-index)",
- "mio-extras 2.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand 0.6.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "sha-1 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "slab 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "url 1.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "ws"
 version = "0.9.0"
@@ -5415,7 +5398,7 @@ dependencies = [
 "checksum jsonrpc-http-server 13.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "4edd28922653d79e4f6c0f5d0a1034a4edbc5f9cf6cad8ec85e2a685713e3708"
 "checksum jsonrpc-pubsub 13.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "583f5930821dbc043236fe5d672d496ead7ff83d21351146598386c66fe8722a"
 "checksum jsonrpc-server-utils 13.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "44561bfdd31401bad790527f1e951dde144f2341ddc3e1b859d32945e1a34eff"
-"checksum jsonrpc-ws-server 13.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "aee1265de937bd53ad0fc95ff5817314922ce009fa99a04a09fdf449b140ddf6"
+"checksum jsonrpc-ws-server 13.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d230ff76a8e4a3fb068aab6ba23d0c4e7d6e3b41bca524daa33988b04b065265"
 "checksum keccak 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "67c21572b4949434e4fc1e1978b99c5f77064153c59d998bf13ecd96fb5ecba7"
 "checksum kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "7507624b29483431c0ba2d82aece8ca6cdba9382bff4ddd0f7490560c056098d"
 "checksum lalrpop 0.16.3 (registry+https://github.com/rust-lang/crates.io-index)" = "4e2e80bee40b22bca46665b4ef1f3cd88ed0fb043c971407eac17a0712c02572"
@@ -5703,7 +5686,6 @@ dependencies = [
 "checksum wincolor 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "561ed901ae465d6185fa7864d63fbd5720d0ef718366c9a4dc83cf6170d7e9ba"
 "checksum winconsole 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)" = "3ef84b96d10db72dd980056666d7f1e7663ce93d82fa33b63e71c966f4cf5032"
 "checksum winreg 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)" = "b2986deb581c4fe11b621998a5e53361efe6b48a151178d0cd9eeffa4dc6acc9"
-"checksum ws 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)" = "ec91ea61b83ce033c43c06c52ddc7532f465c0153281610d44c58b74083aee1a"
 "checksum ws 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "8a6f5bb86663ff4d1639408410f50bf6050367a8525d644d49a6894cd618a631"
 "checksum ws2_32-sys 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "d59cefebd0c892fa2dd6de581e937301d8552cb44489cdff035c6187cb63fa5e"
 "checksum x25519-dalek 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)" = "7ee1585dc1484373cbc1cee7aafda26634665cf449436fd6e24bfd1fad230538"
diff --git a/core/Cargo.toml b/core/Cargo.toml
index ba2f51f4c..7645e1c6c 100644
--- a/core/Cargo.toml
+++ b/core/Cargo.toml
@@ -34,7 +34,7 @@ jsonrpc-core = "13.1.0"
 jsonrpc-derive = "13.1.0"
 jsonrpc-http-server = "13.1.0"
 jsonrpc-pubsub = "13.0.0"
-jsonrpc-ws-server = "13.0.0"
+jsonrpc-ws-server = "13.1.0"
 libc = "0.2.62"
 log = "0.4.8"
 memmap = { version = "0.7.0", optional = true }