diff --git a/src/operation_transformation/edited_text.rs b/src/operation_transformation/edited_text.rs
index 30643b1..4b2bdc2 100644
--- a/src/operation_transformation/edited_text.rs
+++ b/src/operation_transformation/edited_text.rs
@@ -10,7 +10,8 @@ use crate::{
     },
     raw_operation::RawOperation,
     tokenizer::{Tokenizer, word_tokenizer::word_tokenizer},
-    utils::{history::History, side::Side, string_builder::StringBuilder},
+    types::{history::History, side::Side, text_with_history::TextWithHistory},
+    utils::string_builder::StringBuilder,
 };
 
 /// A text document and a sequence of operations that can be applied to the text
@@ -228,7 +229,7 @@ where
     }
 
     #[must_use]
-    pub fn apply_with_history(&self) -> Vec<(History, String)> {
+    pub fn apply_with_history(&self) -> Vec<TextWithHistory> {
         let mut builder: StringBuilder<'_> = StringBuilder::new(self.text);
 
         let mut history = Vec::with_capacity(self.operations.len());
@@ -237,10 +238,17 @@ where
             builder = operation.apply(builder);
 
             match operation {
-                Operation::Equal { .. } => history.push((History::Unchanged, builder.take())),
+                Operation::Equal { .. } => {
+                    history.push(TextWithHistory::new(History::Unchanged, builder.take()))
+                }
                 Operation::Insert { side, .. } => match side {
-                    Side::Left => history.push((History::AddedFromLeft, builder.take())),
-                    Side::Right => history.push((History::AddedFromRight, builder.take())),
+                    Side::Left => {
+                        history.push(TextWithHistory::new(History::AddedFromLeft, builder.take()))
+                    }
+                    Side::Right => history.push(TextWithHistory::new(
+                        History::AddedFromRight,
+                        builder.take(),
+                    )),
                 },
                 Operation::Delete {
                     deleted_character_count,
@@ -250,8 +258,12 @@ where
                 } => {
                     let deleted = self.text[*order..*order + *deleted_character_count].to_string();
                     match side {
-                        Side::Left => history.push((History::RemovedFromLeft, deleted)),
-                        Side::Right => history.push((History::RemovedFromRight, deleted)),
+                        Side::Left => {
+                            history.push(TextWithHistory::new(History::RemovedFromLeft, deleted))
+                        }
+                        Side::Right => {
+                            history.push(TextWithHistory::new(History::RemovedFromRight, deleted))
+                        }
                     }
                 }
             }
diff --git a/src/operation_transformation/operation.rs b/src/operation_transformation/operation.rs
index 05aad3f..ef0a674 100644
--- a/src/operation_transformation/operation.rs
+++ b/src/operation_transformation/operation.rs
@@ -4,9 +4,9 @@ use core::fmt::{Debug, Display};
 use serde::{Deserialize, Serialize};
 
 use crate::{
-    Token,
+    Side, Token,
     utils::{
-        find_longest_prefix_contained_within::find_longest_prefix_contained_within, side::Side,
+        find_longest_prefix_contained_within::find_longest_prefix_contained_within,
         string_builder::StringBuilder,
     },
 };
diff --git a/src/types.rs b/src/types.rs
new file mode 100644
index 0000000..5dde9b3
--- /dev/null
+++ b/src/types.rs
@@ -0,0 +1,3 @@
+pub mod history;
+pub mod side;
+pub mod text_with_history;
diff --git a/src/utils/history.rs b/src/types/history.rs
similarity index 79%
rename from src/utils/history.rs
rename to src/types/history.rs
index cfba9c8..e30ae90 100644
--- a/src/utils/history.rs
+++ b/src/types/history.rs
@@ -1,7 +1,10 @@
+#[cfg(feature = "serde")]
+use serde::{Deserialize, Serialize};
 #[cfg(feature = "wasm")]
 use wasm_bindgen::prelude::*;
 
 #[cfg_attr(feature = "wasm", wasm_bindgen)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 #[cfg(feature = "wasm")]
 pub enum History {
@@ -16,6 +19,7 @@ pub enum History {
 /// When compiled to WASM, the enum values are the same as their names.
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 #[cfg(not(feature = "wasm"))]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub enum History {
     Unchanged,
     AddedFromLeft,
diff --git a/src/utils/side.rs b/src/types/side.rs
similarity index 100%
rename from src/utils/side.rs
rename to src/types/side.rs
diff --git a/src/types/text_with_history.rs b/src/types/text_with_history.rs
new file mode 100644
index 0000000..06aff78
--- /dev/null
+++ b/src/types/text_with_history.rs
@@ -0,0 +1,26 @@
+#[cfg(feature = "serde")]
+use serde::{Deserialize, Serialize};
+#[cfg(feature = "wasm")]
+use wasm_bindgen::prelude::*;
+
+use crate::types::history::History;
+
+/// Wrapper type to expose `(History, String)` to JS.
+#[cfg_attr(feature = "wasm", wasm_bindgen)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[derive(Debug, Clone, PartialEq)]
+pub struct TextWithHistory {
+    history: History,
+    text: String,
+}
+
+#[cfg_attr(feature = "wasm", wasm_bindgen)]
+impl TextWithHistory {
+    pub fn new(history: History, text: String) -> Self { TextWithHistory { history, text } }
+
+    #[must_use]
+    pub fn history(&self) -> History { self.history }
+
+    #[must_use]
+    pub fn text(&self) -> String { self.text.clone() }
+}
diff --git a/src/utils.rs b/src/utils.rs
index 58d55b8..2e05a70 100644
--- a/src/utils.rs
+++ b/src/utils.rs
@@ -1,7 +1,5 @@
 pub mod common_prefix_len;
 pub mod common_suffix_len;
 pub mod find_longest_prefix_contained_within;
-pub mod history;
 pub mod myers_diff;
-pub mod side;
 pub mod string_builder;
diff --git a/src/wasm/types.rs b/src/wasm/types.rs
index d2aa486..f18d224 100644
--- a/src/wasm/types.rs
+++ b/src/wasm/types.rs
@@ -1,3 +1,6 @@
+#[cfg(feature = "serde")]
+use serde::{Deserialize, Serialize};
+#[cfg(feature = "wasm")]
 use wasm_bindgen::prelude::*;
 
 use crate::History;
@@ -88,24 +91,3 @@ impl From<crate::CursorPosition> for JsCursorPosition {
         }
     }
 }
-
-/// Wrapper type to expose `(History, String)` to JS.
-#[wasm_bindgen]
-#[derive(Debug, Clone, PartialEq)]
-pub struct JsTextWithHistory {
-    history: History,
-    text: String,
-}
-
-impl From<(History, String)> for JsTextWithHistory {
-    fn from((history, text): (History, String)) -> Self { JsTextWithHistory { history, text } }
-}
-
-#[wasm_bindgen]
-impl JsTextWithHistory {
-    #[must_use]
-    pub fn history(&self) -> History { self.history }
-
-    #[must_use]
-    pub fn text(&self) -> String { self.text.clone() }
-}