diff --git a/src/configuration.rs b/src/configuration.rs
index fe5698bb..57efa219 100644
--- a/src/configuration.rs
+++ b/src/configuration.rs
@@ -31,6 +31,11 @@ use alloc::{boxed::Box, fmt, string::String};
 /// ```
 #[allow(clippy::struct_excessive_bools)]
 #[derive(Clone, Debug, Eq, PartialEq)]
+#[cfg_attr(
+    feature = "serde",
+    derive(serde::Serialize, serde::Deserialize),
+    serde(rename_all = "camelCase")
+)]
 pub struct Constructs {
     /// Attention.
     ///
@@ -467,6 +472,11 @@ impl Constructs {
 /// ```
 #[allow(clippy::struct_excessive_bools)]
 #[derive(Clone, Debug, Default)]
+#[cfg_attr(
+    feature = "serde",
+    derive(serde::Serialize, serde::Deserialize),
+    serde(default, rename_all = "camelCase")
+)]
 pub struct CompileOptions {
     /// Whether to allow (dangerous) HTML.
     ///
@@ -930,6 +940,11 @@ impl CompileOptions {
 /// # }
 /// ```
 #[allow(clippy::struct_excessive_bools)]
+#[cfg_attr(
+    feature = "serde",
+    derive(serde::Serialize, serde::Deserialize),
+    serde(default, rename_all = "camelCase")
+)]
 pub struct ParseOptions {
     // Note: when adding fields, don’t forget to add them to `fmt::Debug` below.
     /// Which constructs to enable and disable.
@@ -968,6 +983,7 @@ pub struct ParseOptions {
     /// # Ok(())
     /// # }
     /// ```
+    #[cfg_attr(feature = "serde", serde(default))]
     pub constructs: Constructs,
 
     /// Whether to support GFM strikethrough with a single tilde
@@ -1020,6 +1036,7 @@ pub struct ParseOptions {
     /// # Ok(())
     /// # }
     /// ```
+    #[cfg_attr(feature = "serde", serde(default))]
     pub gfm_strikethrough_single_tilde: bool,
 
     /// Whether to support math (text) with a single dollar
@@ -1079,6 +1096,7 @@ pub struct ParseOptions {
     /// # Ok(())
     /// # }
     /// ```
+    #[cfg_attr(feature = "serde", serde(default))]
     pub math_text_single_dollar: bool,
 
     /// Function to parse expressions with.
@@ -1091,6 +1109,7 @@ pub struct ParseOptions {
     ///
     /// For an example that adds support for JavaScript with SWC, see
     /// `tests/test_utils/mod.rs`.
+    #[cfg_attr(feature = "serde", serde(skip))]
     pub mdx_expression_parse: Option<Box<MdxExpressionParse>>,
 
     /// Function to parse ESM with.
@@ -1107,6 +1126,8 @@ pub struct ParseOptions {
     ///
     /// For an example that adds support for JavaScript with SWC, see
     /// `tests/test_utils/mod.rs`.
+    ///
+    #[cfg_attr(feature = "serde", serde(skip))]
     pub mdx_esm_parse: Option<Box<MdxEsmParse>>,
     // Note: when adding fields, don’t forget to add them to `fmt::Debug` below.
 }
@@ -1208,6 +1229,11 @@ impl ParseOptions {
 /// ```
 #[allow(clippy::struct_excessive_bools)]
 #[derive(Debug, Default)]
+#[cfg_attr(
+    feature = "serde",
+    derive(serde::Serialize, serde::Deserialize),
+    serde(default)
+)]
 pub struct Options {
     /// Configuration that describes how to parse from markdown.
     pub parse: ParseOptions,
diff --git a/src/lib.rs b/src/lib.rs
index 584861ef..46a8e5c8 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -17,7 +17,7 @@
 //! *   **`default`**
 //!     — nothing is enabled by default
 //! *   **`serde`**
-//!     — enable serde to serialize the AST (includes `dep:serde`)
+//!     — enable serde to serialize the AST and configuration objects (includes `dep:serde`)
 //! *   **`log`**
 //!     — enable logging (includes `dep:log`);
 //!     you can show logs with `RUST_LOG=debug`
diff --git a/src/util/line_ending.rs b/src/util/line_ending.rs
index be4d8a33..93068b33 100644
--- a/src/util/line_ending.rs
+++ b/src/util/line_ending.rs
@@ -16,6 +16,7 @@ use alloc::{str::FromStr, string::String};
 /// # }
 /// ```
 #[derive(Clone, Debug, Default, Eq, PartialEq)]
+#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
 pub enum LineEnding {
     /// Both a carriage return (`\r`) and a line feed (`\n`).
     ///
@@ -25,6 +26,7 @@ pub enum LineEnding {
     /// a␍␊
     /// b
     /// ```
+    #[cfg_attr(feature = "serde", serde(rename = "\r\n"))]
     CarriageReturnLineFeed,
     /// Sole carriage return (`\r`).
     ///
@@ -34,6 +36,7 @@ pub enum LineEnding {
     /// a␍
     /// b
     /// ```
+    #[cfg_attr(feature = "serde", serde(rename = "\r"))]
     CarriageReturn,
     /// Sole line feed (`\n`).
     ///
@@ -44,6 +47,7 @@ pub enum LineEnding {
     /// b
     /// ```
     #[default]
+    #[cfg_attr(feature = "serde", serde(rename = "\n"))]
     LineFeed,
 }