diff --git a/rpc/Cargo.toml b/rpc/Cargo.toml
index 63731737cc..5b3c223ed4 100644
--- a/rpc/Cargo.toml
+++ b/rpc/Cargo.toml
@@ -7,10 +7,10 @@ description = "Ethereum RPC (web3) compatibility layer for Substrate."
 license = "GPL-3.0"
 
 [dependencies]
-jsonrpc-core = "15.0.0"
+jsonrpc-core = "14.2.0"
 jsonrpc-derive = "14.0.3"
 jsonrpc-core-client = "14.0.3"
-jsonrpc-pubsub = "15.0.0"
+jsonrpc-pubsub = "14.2.0"
 log = "0.4.8"
 ethereum-types = "0.9.0"
 frontier-consensus = { path = "../consensus" }
diff --git a/rpc/core/Cargo.toml b/rpc/core/Cargo.toml
index 8c89b91c75..efe38114cd 100644
--- a/rpc/core/Cargo.toml
+++ b/rpc/core/Cargo.toml
@@ -7,10 +7,10 @@ description = "RPC traits of Ethereum."
 license = "GPL-3.0"
 
 [dependencies]
-jsonrpc-core = "15.0.0"
+jsonrpc-core = "14.2.0"
 jsonrpc-core-client = "14.0.3"
 jsonrpc-derive = "14.0.3"
-jsonrpc-pubsub = "15.0.0"
+jsonrpc-pubsub = "14.2.0"
 rustc-hex = "2.1.0"
 ethereum-types = "0.9.0"
 serde = { version = "1.0", features = ["derive"] }