diff --git a/Cargo.lock b/Cargo.lock
index d9fa51ec0..975aec7cb 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1510,7 +1510,7 @@ dependencies = [
 
 [[package]]
 name = "jsonrpc-core"
-version = "14.0.0"
+version = "13.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "futures 0.1.28 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1522,7 +1522,7 @@ dependencies = [
 
 [[package]]
 name = "jsonrpc-derive"
-version = "14.0.0"
+version = "13.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "proc-macro-crate 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1533,12 +1533,12 @@ dependencies = [
 
 [[package]]
 name = "jsonrpc-http-server"
-version = "14.0.0"
+version = "13.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "hyper 0.12.33 (registry+https://github.com/rust-lang/crates.io-index)",
- "jsonrpc-core 14.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "jsonrpc-server-utils 14.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "jsonrpc-core 13.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "jsonrpc-server-utils 13.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "net2 0.2.33 (registry+https://github.com/rust-lang/crates.io-index)",
  "parking_lot 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1547,10 +1547,10 @@ dependencies = [
 
 [[package]]
 name = "jsonrpc-pubsub"
-version = "14.0.0"
+version = "13.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "jsonrpc-core 14.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "jsonrpc-core 13.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "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)",
  "serde 1.0.101 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1558,14 +1558,15 @@ dependencies = [
 
 [[package]]
 name = "jsonrpc-server-utils"
-version = "14.0.0"
+version = "13.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "bytes 0.4.12 (registry+https://github.com/rust-lang/crates.io-index)",
  "globset 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "jsonrpc-core 14.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "jsonrpc-core 13.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num_cpus 1.10.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "tokio 0.1.22 (registry+https://github.com/rust-lang/crates.io-index)",
  "tokio-codec 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "unicase 2.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1573,11 +1574,11 @@ dependencies = [
 
 [[package]]
 name = "jsonrpc-ws-server"
-version = "14.0.0"
+version = "13.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "jsonrpc-core 14.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "jsonrpc-server-utils 14.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "jsonrpc-core 13.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "jsonrpc-server-utils 13.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "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)",
@@ -3201,8 +3202,8 @@ version = "0.20.0"
 dependencies = [
  "bincode 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "bs58 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "jsonrpc-core 14.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "jsonrpc-http-server 14.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "jsonrpc-core 13.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "jsonrpc-http-server 13.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.6.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "rayon 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -3271,11 +3272,11 @@ dependencies = [
  "hex-literal 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "indexmap 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "itertools 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "jsonrpc-core 14.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "jsonrpc-derive 14.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "jsonrpc-http-server 14.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "jsonrpc-pubsub 14.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "jsonrpc-ws-server 14.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "jsonrpc-core 13.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "jsonrpc-derive 13.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "jsonrpc-http-server 13.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "jsonrpc-pubsub 13.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "jsonrpc-ws-server 13.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.4.0 (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)",
@@ -3945,9 +3946,9 @@ version = "0.20.0"
 dependencies = [
  "bs58 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "clap 2.33.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "jsonrpc-core 14.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "jsonrpc-derive 14.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "jsonrpc-http-server 14.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "jsonrpc-core 13.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "jsonrpc-derive 13.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "jsonrpc-http-server 13.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.101 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_json 1.0.41 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -5524,12 +5525,12 @@ dependencies = [
 "checksum itoa 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)" = "501266b7edd0174f8530248f87f99c88fbe60ca4ef3dd486835b8d8d53136f7f"
 "checksum jobserver 0.1.16 (registry+https://github.com/rust-lang/crates.io-index)" = "f74e73053eaf95399bf926e48fc7a2a3ce50bd0eaaa2357d391e95b2dcdd4f10"
 "checksum js-sys 0.3.27 (registry+https://github.com/rust-lang/crates.io-index)" = "1efc4f2a556c58e79c5500912e221dd826bec64ff4aabd8ce71ccef6da02d7d4"
-"checksum jsonrpc-core 14.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "cf34414fdf9d843f2fd39557ffe7cbf75b53a2cf308e2b69af2ce86f23fd426d"
-"checksum jsonrpc-derive 14.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "f1b217357876c9f55d3237fafaebab1e3925d53a2c2508df05ea15c02ddbb8bc"
-"checksum jsonrpc-http-server 14.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "cc653fb90f38cd203d756557426e87980a7329c4ac19360e7bd167d9f416f36e"
-"checksum jsonrpc-pubsub 14.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "db22ae4d04d336fea4378ad4ad87c29563d983fe98c04319c173817a4fd9891f"
-"checksum jsonrpc-server-utils 14.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "56ca64eeb4463722c49dd526e0a87dfc0cdecda9348a4b6f5720f25abc4fcc89"
-"checksum jsonrpc-ws-server 14.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "f1cdf74f56227cf10ab22c64fd73b730d59b6217cd598b63883d07bd4b8de7c8"
+"checksum jsonrpc-core 13.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "91d767c183a7e58618a609499d359ce3820700b3ebb4823a18c343b4a2a41a0d"
+"checksum jsonrpc-derive 13.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "4a76285ebba4515680fbfe4b62498ccb2a932384c8732eed68351b02fb7ae475"
+"checksum jsonrpc-http-server 13.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "601fcc7bec888c7cbc7fd124d3d6744d72c0ebb540eca6fe2261b71f9cff6320"
+"checksum jsonrpc-pubsub 13.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "64e0fb0664d8ce287e826940dafbb45379443c595bdd71d93655f3c8f25fd992"
+"checksum jsonrpc-server-utils 13.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "4d415f51d016a4682878e19dd03e8c0b61cd4394912d7cd3dc48d4f19f061a4e"
+"checksum jsonrpc-ws-server 13.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "4699433c1ac006d7df178b4c29c191e5bb6d81e2dca18c5c804a094592900101"
 "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"
diff --git a/client/Cargo.toml b/client/Cargo.toml
index 680c2b03f..37b3b08b2 100644
--- a/client/Cargo.toml
+++ b/client/Cargo.toml
@@ -11,7 +11,7 @@ edition = "2018"
 [dependencies]
 bincode = "1.2.0"
 bs58 = "0.3.0"
-jsonrpc-core = "14.0.0"
+jsonrpc-core = "13.2.0"
 log = "0.4.8"
 rand = "0.6.5"
 rayon = "1.2.0"
@@ -23,6 +23,6 @@ solana-netutil = { path = "../netutil", version = "0.20.0" }
 solana-sdk = { path = "../sdk", version = "0.20.0" }
 
 [dev-dependencies]
-jsonrpc-core = "14.0.0"
-jsonrpc-http-server = "14.0.0"
+jsonrpc-core = "13.2.0"
+jsonrpc-http-server = "13.2.0"
 solana-logger = { path = "../logger", version = "0.20.0" }
diff --git a/core/Cargo.toml b/core/Cargo.toml
index 8bb23dde2..93e679110 100644
--- a/core/Cargo.toml
+++ b/core/Cargo.toml
@@ -32,11 +32,11 @@ dlopen_derive = "0.1.4"
 fs_extra = "1.1.0"
 indexmap = "1.1"
 itertools = "0.8.0"
-jsonrpc-core = "14.0.0"
-jsonrpc-derive = "14.0.0"
-jsonrpc-http-server = "14.0.0"
-jsonrpc-pubsub = "14.0.0"
-jsonrpc-ws-server = "14.0.0"
+jsonrpc-core = "13.2.0"
+jsonrpc-derive = "13.2.0"
+jsonrpc-http-server = "13.2.0"
+jsonrpc-pubsub = "13.2.0"
+jsonrpc-ws-server = "13.2.0"
 lazy_static = "1.4.0"
 libc = "0.2.62"
 log = "0.4.8"
diff --git a/vote-signer/Cargo.toml b/vote-signer/Cargo.toml
index f52f4fc9b..7804b564d 100644
--- a/vote-signer/Cargo.toml
+++ b/vote-signer/Cargo.toml
@@ -11,9 +11,9 @@ homepage = "https://solana.com/"
 [dependencies]
 bs58 = "0.3.0"
 clap = "2.33"
-jsonrpc-core = "14.0.0"
-jsonrpc-derive = "14.0.0"
-jsonrpc-http-server = "14.0.0"
+jsonrpc-core = "13.2.0"
+jsonrpc-derive = "13.2.0"
+jsonrpc-http-server = "13.2.0"
 log = "0.4.8"
 serde = "1.0.101"
 serde_json = "1.0.41"