diff --git a/otg/core/src/types.rs b/otg/core/src/types.rs
index 7a4e5ad..09a0a0f 100644
--- a/otg/core/src/types.rs
+++ b/otg/core/src/types.rs
@@ -354,7 +354,7 @@ impl<T> Tree<T> {
         width
     }
 
-    pub fn bfs_iter<'a>(&'a self) -> BFSIter<T> {
+    pub fn bfs_iter(&self) -> BFSIter<T> {
         let mut queue = VecDeque::new();
         queue.push_back(&self.nodes[0]);
         BFSIter { tree: self, queue }
@@ -363,7 +363,7 @@ impl<T> Tree<T> {
 
 impl<'a> From<&'a GameNode> for Tree<Uuid> {
     fn from(root: &'a GameNode) -> Self {
-        fn add_subtree<'a>(tree: &mut Tree<Uuid>, parent_idx: usize, node: &'a GameNode) {
+        fn add_subtree(tree: &mut Tree<Uuid>, parent_idx: usize, node: &GameNode) {
             let idx = tree.add_node(parent_idx, node.id());
 
             let children = match node {
@@ -401,7 +401,7 @@ impl<'a, T> Iterator for BFSIter<'a, T> {
 
     fn next(&mut self) -> Option<Self::Item> {
         let retval = self.queue.pop_front();
-        if let Some(ref retval) = retval {
+        if let Some(retval) = retval {
             retval
                 .children
                 .iter()
diff --git a/otg/gtk/src/components/review_tree.rs b/otg/gtk/src/components/review_tree.rs
index 28acbe2..f759a34 100644
--- a/otg/gtk/src/components/review_tree.rs
+++ b/otg/gtk/src/components/review_tree.rs
@@ -18,7 +18,7 @@ use cairo::Context;
 use glib::Object;
 use gtk::{prelude::*, subclass::prelude::*};
 use otg_core::Tree;
-use sgf::{GameNode, GameRecord};
+use sgf::GameRecord;
 use std::{cell::RefCell, rc::Rc};
 use uuid::Uuid;
 
diff --git a/sgf/src/game.rs b/sgf/src/game.rs
index d11b677..4c68c60 100644
--- a/sgf/src/game.rs
+++ b/sgf/src/game.rs
@@ -121,7 +121,7 @@ impl GameRecord {
     pub fn mainline(&self) -> Vec<&GameNode> {
         let mut moves: Vec<&GameNode> = vec![];
 
-        let mut next = self.children.get(0);
+        let mut next = self.children.first();
         while let Some(node) = next {
             // Given that I know that I have a node, and I know that I'm going to push a reference
             // to it onto my final list, I want to get the first of its children. And I want to
@@ -136,8 +136,8 @@ impl GameRecord {
             moves.push(node);
 
             next = match node {
-                GameNode::MoveNode(node) => node.children.get(0),
-                GameNode::SetupNode(node) => node.children.get(0),
+                GameNode::MoveNode(node) => node.children.first(),
+                GameNode::SetupNode(node) => node.children.first(),
             };
         }