diff --git a/json_rpc/clients/httpclient.nim b/json_rpc/clients/httpclient.nim
index 2e419f7..02ca22b 100644
--- a/json_rpc/clients/httpclient.nim
+++ b/json_rpc/clients/httpclient.nim
@@ -152,10 +152,11 @@ method call*(client: RpcHttpClient, name: string,
   if msgRes.isErr:
     # Need to clean up in case the answer was invalid
     debug "Failed to process POST Response for JSON-RPC", msg = msgRes.error
-    newFut.cancelSoon()
+    let exc = newException(JsonRpcError, msgRes.error)
+    newFut.fail(exc)
     client.awaiting.del(id)
     closeRefs()
-    raise newException(JsonRpcError, msgRes.error)
+    raise exc
 
   client.awaiting.del(id)
 
diff --git a/json_rpc/servers/websocketserver.nim b/json_rpc/servers/websocketserver.nim
index 3789375..e61e3a9 100644
--- a/json_rpc/servers/websocketserver.nim
+++ b/json_rpc/servers/websocketserver.nim
@@ -86,7 +86,7 @@ proc handleRequest(rpc: RpcWebSocketServer, request: HttpRequest) {.async: (rais
           debug "Internal error, while processing RPC call",
             address = $request.uri
           await ws.close(
-            reason = "Internal error, while processing RPC call"
+            reason = "Internal error, while processing RPC call: " & exc.msg
           )
           break