diff --git a/src/sections/items.tex b/src/sections/items.tex
index ed60678..9718a5d 100644
--- a/src/sections/items.tex
+++ b/src/sections/items.tex
@@ -319,14 +319,15 @@ tm = require("testium")
   \end{itemize}
 \end{frame}
 
-\begin{frame}[fragile]{\incode{json_rpc} test item}
+\begin{frame}[fragile]{\incode{json\_rpc} test item}
 \begin{columns}
   \column{0.6\textwidth}
   \begin{itemize}
     \item JSON-RPC is a remote procedure call standard
-    \item
+    \item transport protocol can be chosen among:
     \begin{itemize}
-      \item bla
+      \item udp
+      \item a previously opened \incode{console}
     \end{itemize}
   \end{itemize}
   \begin{listing}[H]
@@ -346,8 +347,8 @@ tm = require("testium")
                 - {a: 1, b: "hello"}
             timeout: 1
         - close:
-     \end{minted}
-    \caption{\incode{loop} usage example}
+    \end{minted}
+    \caption{\incode{json\_rpc} query example, waiting for server answer}
     \end{listing}
   \column{0.4\textwidth}
     \begin{listing}[H]
@@ -377,8 +378,8 @@ tm = require("testium")
         - receive:
             id: 3095372
         - close:
-     \end{minted}
-    \caption{\incode{loop} usage example}
+    \end{minted}
+    \caption{\incode{json\_rpc} query and answer separated}
     \end{listing}
   \end{columns}
 \end{frame}
\ No newline at end of file