diff --git a/Cargo.lock b/Cargo.lock
index d18dbe7..c19483d 100644
--- a/Cargo.lock
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diff --git a/src/bin/itmdump.rs b/src/bin/itmdump.rs
index 455623a..a002c83 100644
--- a/src/bin/itmdump.rs
+++ b/src/bin/itmdump.rs
@@ -128,13 +128,13 @@ fn run() -> Result<(), failure::Error> {
     // Unreachable.
 }
 
-fn open_read(matches: &ArgMatches) -> Result<Box<io::Read + 'static>, io::Error> {
+fn open_read(matches: &ArgMatches) -> Result<Box<dyn io::Read + 'static>, io::Error> {
     let path = matches.value_of("file");
     Ok(match path {
         Some(path) => {
             let f = File::open(path)?;
-            Box::new(f) as Box<io::Read + 'static>
+            Box::new(f) as Box<dyn io::Read + 'static>
         }
-        None => Box::new(io::stdin()) as Box<io::Read + 'static>,
+        None => Box::new(io::stdin()) as Box<dyn io::Read + 'static>,
     })
 }