diff --git a/Cargo.lock b/Cargo.lock
index aa215150e56..bde96f7132f 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -695,11 +695,11 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "jsonrpc-core"
-version = "8.0.1"
+version = "9.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "futures 0.1.25 (registry+https://github.com/rust-lang/crates.io-index)",
- "log 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.82 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 1.0.80 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_json 1.0.33 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -799,14 +799,6 @@ dependencies = [
  "scopeguard 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
-[[package]]
-name = "log"
-version = "0.3.9"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "log"
 version = "0.4.6"
@@ -1145,7 +1137,7 @@ dependencies = [
  "failure 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "home 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "itertools 0.7.9 (registry+https://github.com/rust-lang/crates.io-index)",
- "jsonrpc-core 8.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "jsonrpc-core 9.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "languageserver-types 0.51.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1864,7 +1856,7 @@ dependencies = [
 "checksum itoa 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)" = "1306f3464951f30e30d12373d31c79fbd52d236e5e896fd92f96ec7babbbe60b"
 "checksum jobserver 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)" = "60af5f849e1981434e4a31d3d782c4774ae9b434ce55b101a96ecfd09147e8be"
 "checksum json 0.11.13 (registry+https://github.com/rust-lang/crates.io-index)" = "9ad0485404155f45cce53a40d4b2d6ac356418300daed05273d9e26f91c390be"
-"checksum jsonrpc-core 8.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "ddf83704f4e79979a424d1082dd2c1e52683058056c9280efa19ac5f6bc9033c"
+"checksum jsonrpc-core 9.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "4e9cbeda300803d381390fb65e8158437728c39e6987ed23bee82728b73511a7"
 "checksum kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "7507624b29483431c0ba2d82aece8ca6cdba9382bff4ddd0f7490560c056098d"
 "checksum languageserver-types 0.51.1 (registry+https://github.com/rust-lang/crates.io-index)" = "68de833188ada4e175d04a028f03f244f6370eedbcc75a05604d47d925933f69"
 "checksum lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "a374c89b9db55895453a74c1e38861d9deec0b01b405a82516e9d5de4820dea1"
@@ -1875,7 +1867,6 @@ dependencies = [
 "checksum libssh2-sys 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)" = "126a1f4078368b163bfdee65fbab072af08a1b374a5551b21e87ade27b1fbf9d"
 "checksum libz-sys 1.0.25 (registry+https://github.com/rust-lang/crates.io-index)" = "2eb5e43362e38e2bca2fd5f5134c4d4564a23a5c28e9b95411652021a8675ebe"
 "checksum lock_api 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "62ebf1391f6acad60e5c8b43706dde4582df75c06698ab44511d15016bc2442c"
-"checksum log 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)" = "e19e8d5c34a3e0e2223db8e060f9e8264aeeb5c5fc64a4ee9965c062211c024b"
 "checksum log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)" = "c84ec4b527950aa83a329754b01dbe3f58361d1c5efacd1f6d68c494d08a17c6"
 "checksum matches 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)" = "7ffc5c5338469d4d3ea17d269fa8ea3512ad247247c30bd2df69e68309ed0a08"
 "checksum memchr 2.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "0a3eb002f0535929f1199681417029ebea04aadc0c7a4224b46be99c7f5d6a16"
diff --git a/Cargo.toml b/Cargo.toml
index 96f775bc3a8..c47c91bf4d5 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -18,7 +18,7 @@ env_logger = "0.5"
 failure = "0.1.1"
 home = "0.3"
 itertools = "0.7.3"
-jsonrpc-core = "8.0.1"
+jsonrpc-core = "9"
 languageserver-types = "0.51"
 lazy_static = "1"
 log = "0.4"
diff --git a/src/server/message.rs b/src/server/message.rs
index 54741177064..9bd5249672f 100644
--- a/src/server/message.rs
+++ b/src/server/message.rs
@@ -461,7 +461,7 @@ mod test {
     fn raw_message_parses_valid_jsonrpc_request_with_numeric_id() {
         let raw_json = json!({
             "jsonrpc": "2.0",
-            "id": "1",
+            "id": 1,
             "method": "someRpcCall",
         }).to_string();