diff --git a/src/expression/parser.rs b/src/expression/parser.rs
index 746f97a..488bfb4 100644
--- a/src/expression/parser.rs
+++ b/src/expression/parser.rs
@@ -13,10 +13,10 @@ impl Expression {
     /// The validation can fail for many reasons:
     /// * The expression contains invalid characters
     /// * An unknown/invalid license or exception identifier was found. Only
-    /// [SPDX short identifiers](https://spdx.org/ids) are allowed
+    ///     [SPDX short identifiers](https://spdx.org/ids) are allowed
     /// * The expression contained unbalanced parentheses
     /// * A license or exception immediately follows another license or exception, without
-    /// a valid AND, OR, or WITH operator separating them
+    ///     a valid AND, OR, or WITH operator separating them
     /// * An AND, OR, or WITH doesn't have a license or `)` preceding it
     ///
     /// ```
@@ -35,7 +35,7 @@ impl Expression {
     /// 1. Lower-cased operators ('or', 'and', 'with') are upper-cased
     /// 1. '+' is tranformed to `-or-later` for GNU licenses
     /// 1. Invalid/imprecise license identifiers (eg. `apache2`) are replaced
-    /// with their valid identifiers
+    ///     with their valid identifiers
     ///
     /// If the provided expression is not modified then `None` is returned
     ///
diff --git a/src/lexer.rs b/src/lexer.rs
index 41ff1af..c738853 100644
--- a/src/lexer.rs
+++ b/src/lexer.rs
@@ -35,8 +35,8 @@ impl ParseMode {
     /// Strict, specification compliant SPDX parsing.
     ///
     /// 1. Only license identifiers in the SPDX license list, or
-    /// Document/LicenseRef, are allowed. The license identifiers are also
-    /// case-sensitive.
+    ///     Document/LicenseRef, are allowed. The license identifiers are also
+    ///     case-sensitive.
     /// 1. `WITH`, `AND`, and `OR` are the only valid operators
     pub const STRICT: Self = Self {
         allow_lower_case_operators: false,
@@ -48,12 +48,12 @@ impl ParseMode {
     /// Allow non-conforming syntax for crates-io compatibility
     ///
     /// 1. Additional, invalid, identifiers are accepted and mapped to a correct
-    /// SPDX license identifier.
-    /// See [`IMPRECISE_NAMES`](crate::identifiers::IMPRECISE_NAMES) for the
-    /// list of additionally accepted identifiers and the license they
-    /// correspond to.
+    ///     SPDX license identifier.
+    ///     See [`IMPRECISE_NAMES`](crate::identifiers::IMPRECISE_NAMES) for the
+    ///     list of additionally accepted identifiers and the license they
+    ///     correspond to.
     /// 1. `/` can by used as a synonym for `OR`, and doesn't need to be
-    /// separated by whitespace from the terms it combines
+    ///     separated by whitespace from the terms it combines
     pub const LAX: Self = Self {
         allow_lower_case_operators: true,
         allow_slash_as_or_operator: true,