diff --git a/eth-rpc/server/servertypes.nim b/eth-rpc/server/servertypes.nim
index b48ab00..0f67de5 100644
--- a/eth-rpc/server/servertypes.nim
+++ b/eth-rpc/server/servertypes.nim
@@ -44,7 +44,7 @@ proc hasReturnType(params: NimNode): bool =
   if params != nil and params.len > 0 and params[0] != nil and params[0].kind != nnkEmpty:
     result = true
 
-macro rpc*(server: var RpcServer, path: string, body: untyped): untyped =
+macro rpc*(server: RpcServer, path: string, body: untyped): untyped =
   result = newStmtList()
   let
     parameters = body.findChild(it.kind == nnkFormalParams)
diff --git a/tests/testserverclient.nim b/tests/testserverclient.nim
index b09fbe2..407c248 100644
--- a/tests/testserverclient.nim
+++ b/tests/testserverclient.nim
@@ -5,7 +5,7 @@ var srv = newRpcServer()
 srv.address = "localhost"
 srv.port = Port(8545)
 
-proc makeProc(server: var RpcServer) =
+proc makeProc(server: RpcServer) =
   server.rpc("myProc") do(input: string, data: array[0..3, int]):
     result = %("Hello " & input & " data: " & $data)