diff --git a/lib/rs/src/server/mod.rs b/lib/rs/src/server/mod.rs
index b719d1b..f24c113 100644
--- a/lib/rs/src/server/mod.rs
+++ b/lib/rs/src/server/mod.rs
@@ -56,7 +56,7 @@
 ///
 /// // `TProcessor` implementation for `SimpleService`
 /// impl TProcessor for SimpleServiceSyncProcessor {
-///     fn process(&self, i: &mut TInputProtocol, o: &mut TOutputProtocol) -> thrift::Result<()> {
+///     fn process(&self, i: &mut dyn TInputProtocol, o: &mut dyn TOutputProtocol) -> thrift::Result<()> {
 ///         unimplemented!();
 ///     }
 /// }
diff --git a/lib/rs/src/server/threaded.rs b/lib/rs/src/server/threaded.rs
index 8f8c082..b33239a 100644
--- a/lib/rs/src/server/threaded.rs
+++ b/lib/rs/src/server/threaded.rs
@@ -64,7 +64,7 @@
 ///
 /// // `TProcessor` implementation for `SimpleService`
 /// impl TProcessor for SimpleServiceSyncProcessor {
-///     fn process(&self, i: &mut TInputProtocol, o: &mut TOutputProtocol) -> thrift::Result<()> {
+///     fn process(&self, i: &mut dyn TInputProtocol, o: &mut dyn TOutputProtocol) -> thrift::Result<()> {
 ///         unimplemented!();
 ///     }
 /// }
@@ -90,10 +90,10 @@
 /// let processor = SimpleServiceSyncProcessor::new(SimpleServiceHandlerImpl {});
 ///
 /// // instantiate the server
-/// let i_tr_fact: Box<TReadTransportFactory> = Box::new(TBufferedReadTransportFactory::new());
-/// let i_pr_fact: Box<TInputProtocolFactory> = Box::new(TBinaryInputProtocolFactory::new());
-/// let o_tr_fact: Box<TWriteTransportFactory> = Box::new(TBufferedWriteTransportFactory::new());
-/// let o_pr_fact: Box<TOutputProtocolFactory> = Box::new(TBinaryOutputProtocolFactory::new());
+/// let i_tr_fact: Box<dyn TReadTransportFactory> = Box::new(TBufferedReadTransportFactory::new());
+/// let i_pr_fact: Box<dyn TInputProtocolFactory> = Box::new(TBinaryInputProtocolFactory::new());
+/// let o_tr_fact: Box<dyn TWriteTransportFactory> = Box::new(TBufferedWriteTransportFactory::new());
+/// let o_pr_fact: Box<dyn TOutputProtocolFactory> = Box::new(TBinaryOutputProtocolFactory::new());
 ///
 /// let mut server = TServer::new(
 ///     i_tr_fact,