diff --git a/Cargo.toml b/Cargo.toml
index 44fc88e0..61749a89 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -28,7 +28,6 @@ log = "0.4.17"
 memchr = "2.5.0"
 opener = "0.6.1"
 pulldown-cmark = { version = "0.9.3", default-features = false }
-pathdiff = "0.2.1"
 regex = "1.8.1"
 serde = { version = "1.0.163", features = ["derive"] }
 serde_json = "1.0.96"
@@ -41,6 +40,7 @@ topological-sort = "0.2.2"
 notify = { version = "6.1.1", optional = true }
 notify-debouncer-mini = { version = "0.4.1", optional = true }
 ignore = { version = "0.4.20", optional = true }
+pathdiff = { version = "0.2.1", optional = true }
 
 # Serve feature
 futures-util = { version = "0.3.28", optional = true }
@@ -61,7 +61,7 @@ walkdir = "2.3.3"
 
 [features]
 default = ["watch", "serve", "search"]
-watch = ["dep:notify", "dep:notify-debouncer-mini", "dep:ignore"]
+watch = ["dep:notify", "dep:notify-debouncer-mini", "dep:ignore", "dep:pathdiff"]
 serve = ["dep:futures-util", "dep:tokio", "dep:warp"]
 search = ["dep:elasticlunr-rs", "dep:ammonia"]
 
diff --git a/src/renderer/html_handlebars/hbs_renderer.rs b/src/renderer/html_handlebars/hbs_renderer.rs
index 6e08203b..9f5277f5 100644
--- a/src/renderer/html_handlebars/hbs_renderer.rs
+++ b/src/renderer/html_handlebars/hbs_renderer.rs
@@ -939,8 +939,9 @@ fn add_playground_pre(
 /// Modifies all `<code>` blocks to convert "hidden" lines and to wrap them in
 /// a `<span class="boring">`.
 fn hide_lines(html: &str, code_config: &Code) -> String {
-    let language_regex = Regex::new(r"\blanguage-(\w+)\b").unwrap();
-    let hidelines_regex = Regex::new(r"\bhidelines=(\S+)").unwrap();
+    static LANGUAGE_REGEX: Lazy<Regex> = Lazy::new(|| Regex::new(r"\blanguage-(\w+)\b").unwrap());
+    static HIDELINES_REGEX: Lazy<Regex> = Lazy::new(|| Regex::new(r"\bhidelines=(\S+)").unwrap());
+
     CODE_BLOCK_RE
         .replace_all(html, |caps: &Captures<'_>| {
             let text = &caps[1];
@@ -955,12 +956,12 @@ fn hide_lines(html: &str, code_config: &Code) -> String {
                 )
             } else {
                 // First try to get the prefix from the code block
-                let hidelines_capture = hidelines_regex.captures(classes);
+                let hidelines_capture = HIDELINES_REGEX.captures(classes);
                 let hidelines_prefix = match &hidelines_capture {
                     Some(capture) => Some(&capture[1]),
                     None => {
                         // Then look up the prefix by language
-                        language_regex.captures(classes).and_then(|capture| {
+                        LANGUAGE_REGEX.captures(classes).and_then(|capture| {
                             code_config.hidelines.get(&capture[1]).map(|p| p.as_str())
                         })
                     }
diff --git a/src/renderer/html_handlebars/helpers/navigation.rs b/src/renderer/html_handlebars/helpers/navigation.rs
index 86b240ba..12c69027 100644
--- a/src/renderer/html_handlebars/helpers/navigation.rs
+++ b/src/renderer/html_handlebars/helpers/navigation.rs
@@ -103,7 +103,7 @@ fn find_chapter(
                     }
                 }
 
-                previous = Some(item.clone());
+                previous = Some(item);
             }
             _ => continue,
         }