2 files changed, 6 insertions, 6 deletions
diff --git a/src/statistics/mod.rs b/src/statistics/mod.rs
index f46f778..eccc3ee 100644
--- a/src/statistics/mod.rs
+++ b/src/statistics/mod.rs
@@ -20,7 +20,7 @@ pub type StatResult<T> = Result<T, StatError>;
 quick_error! {
     #[derive(Debug)]
     pub enum StatError {
-        TrackerError(err: Box<Error>) {
+        TrackerError(err: Box<dyn Error>) {
             description("tracker error")
             display("tracker returned an error: {}", err)
             cause(&**err)
@@ -76,9 +76,9 @@ impl AgentStats {
 ///
 /// This method returns "nothing", as the statistics are saved in the trackers.
 /// It's the job of the caller to extract them appropriately.
-pub fn run_trackers(log: &Log, trackers: &mut [&mut RunnableTracker]) -> StatResult<()> {
+pub fn run_trackers(log: &Log, trackers: &mut [&mut dyn RunnableTracker]) -> StatResult<()> {
     for event in log.events() {
-        for mut tracker in trackers.iter_mut() {
+        for tracker in trackers.iter_mut() {
             try_tracker!((*tracker).run_feed(event));
         }
     }
diff --git a/src/statistics/trackers.rs b/src/statistics/trackers.rs
index 98915d2..16cb755 100644
--- a/src/statistics/trackers.rs
+++ b/src/statistics/trackers.rs
@@ -64,12 +64,12 @@ pub trait Tracker {
 /// if you plan on getting any data.
 pub trait RunnableTracker {
     /// See `Tracker.feed()`. Renamed to avoid conflicts.
-    fn run_feed(&mut self, event: &Event) -> Result<(), Box<Error>>;
+    fn run_feed(&mut self, event: &Event) -> Result<(), Box<dyn Error>>;
 }
 
 impl<S, E: Error + 'static, T: Tracker<Stat = S, Error = E>> RunnableTracker for T {
-    fn run_feed(&mut self, event: &Event) -> Result<(), Box<Error>> {
-        self.feed(event).map_err(|e| Box::new(e) as Box<Error>)
+    fn run_feed(&mut self, event: &Event) -> Result<(), Box<dyn Error>> {
+        self.feed(event).map_err(|e| Box::new(e) as Box<dyn Error>)
     }
 }