diff --git a/src/file_handler/mod.rs b/src/file_handler/mod.rs
index 0c825f165..eb3ac3773 100644
--- a/src/file_handler/mod.rs
+++ b/src/file_handler/mod.rs
@@ -45,7 +45,7 @@ impl<P: AsRef<Path>> PathFileHandler<P> {
     }
 }
 
-impl<'a, P: AsRef<Path>> FileHandler for &'a mut PathFileHandler<P> {
+impl<P: AsRef<Path>> FileHandler for &mut PathFileHandler<P> {
     type Reader = File;
     fn get_file_if_exists(self, name: &str) -> Result<(Option<Self::Reader>, PathBuf)> {
         let f = self.base_path.as_ref().join(name);
diff --git a/src/gtfs/mod.rs b/src/gtfs/mod.rs
index 8301b6be8..e7fd655ec 100644
--- a/src/gtfs/mod.rs
+++ b/src/gtfs/mod.rs
@@ -69,7 +69,7 @@ struct Agency {
     ticketing_deep_link_id: Option<String>,
 }
 
-impl<'a> From<&'a objects::Network> for Agency {
+impl From<&objects::Network> for Agency {
     fn from(obj: &objects::Network) -> Agency {
         Agency {
             id: Some(obj.id.clone()),
@@ -248,7 +248,7 @@ struct BookingRule {
     booking_url: Option<String>,
 }
 
-impl<'a> From<&'a objects::BookingRule> for BookingRule {
+impl From<&objects::BookingRule> for BookingRule {
     fn from(obj: &objects::BookingRule) -> BookingRule {
         BookingRule {
             id: obj.id.clone(),
@@ -286,7 +286,7 @@ struct Transfer {
     min_transfer_time: Option<u32>,
 }
 
-impl<'a> From<&'a objects::Transfer> for Transfer {
+impl From<&objects::Transfer> for Transfer {
     fn from(obj: &objects::Transfer) -> Transfer {
         Transfer {
             from_stop_id: obj.from_stop_id.clone(),
diff --git a/src/gtfs/write.rs b/src/gtfs/write.rs
index 6ca8461e9..8e7944450 100644
--- a/src/gtfs/write.rs
+++ b/src/gtfs/write.rs
@@ -375,7 +375,7 @@ where
         .collect()
 }
 
-impl<'a> From<&'a objects::PhysicalMode> for RouteType {
+impl From<&objects::PhysicalMode> for RouteType {
     fn from(obj: &objects::PhysicalMode) -> RouteType {
         match obj.id.as_str() {
             "RailShuttle" | "Tramway" => RouteType::Tramway,
diff --git a/src/model_builder.rs b/src/model_builder.rs
index 6606b4f01..156119c41 100644
--- a/src/model_builder.rs
+++ b/src/model_builder.rs
@@ -606,7 +606,7 @@ impl AsDateTime for &NaiveDateTime {
     }
 }
 
-impl<'a> VehicleJourneyBuilder<'a> {
+impl VehicleJourneyBuilder<'_> {
     fn find_or_create_sp(&mut self, sp: &str) -> Idx<StopPoint> {
         self.model
             .collections
@@ -1039,7 +1039,7 @@ impl<'a> VehicleJourneyBuilder<'a> {
     }
 }
 
-impl<'a> Drop for VehicleJourneyBuilder<'a> {
+impl Drop for VehicleJourneyBuilder<'_> {
     fn drop(&mut self) {
         use std::ops::DerefMut;
         let collections = &mut self.model.collections;
diff --git a/src/objects.rs b/src/objects.rs
index 268729038..e9386828c 100644
--- a/src/objects.rs
+++ b/src/objects.rs
@@ -923,7 +923,7 @@ impl<'de> ::serde::Deserialize<'de> for Time {
 
         // using the visitor pattern to avoid a string allocation
         struct TimeVisitor;
-        impl<'de> Visitor<'de> for TimeVisitor {
+        impl Visitor<'_> for TimeVisitor {
             type Value = Time;
             fn expecting(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
                 formatter.write_str("a time in the format HH:MM:SS")