diff --git a/src/config.rs b/src/config.rs
index 1ae2b2e..a624fc1 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -4,7 +4,7 @@ use crossterm::{
     event::{KeyCode, KeyModifiers},
     style::{Attribute, Attributes, Color, ContentStyle},
 };
-use promkit::style::StyleBuilder;
+use promkit::{style::StyleBuilder, text_editor::Mode};
 use serde::{Deserialize, Serialize};
 use tokio::time::Duration;
 
@@ -14,11 +14,15 @@ mod duration;
 use duration::duration_serde;
 pub mod event;
 use event::{EventDefSet, KeyEventDef};
+mod text_editor;
+use text_editor::text_editor_mode_serde;
 
 #[derive(Serialize, Deserialize)]
 pub(crate) struct EditorConfig {
     pub theme_on_focus: EditorTheme,
     pub theme_on_defocus: EditorTheme,
+    #[serde(with = "text_editor_mode_serde")]
+    pub mode: Mode,
     pub word_break_chars: HashSet<char>,
 }
 
@@ -58,6 +62,7 @@ impl Default for EditorConfig {
                     .attrs(Attributes::from(Attribute::Dim))
                     .build(),
             },
+            mode: Mode::Insert,
             word_break_chars: HashSet::from(['.', '|', '(', ')', '[', ']']),
         }
     }
diff --git a/src/config/text_editor.rs b/src/config/text_editor.rs
new file mode 100644
index 0000000..318e372
--- /dev/null
+++ b/src/config/text_editor.rs
@@ -0,0 +1,34 @@
+use promkit::text_editor::Mode;
+use serde::{Deserialize, Deserializer, Serialize, Serializer};
+
+pub mod text_editor_mode_serde {
+    use super::*;
+
+    pub fn serialize<S>(mode: &Mode, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        let mode_str = match mode {
+            Mode::Insert => "Insert",
+            Mode::Overwrite => "Overwrite",
+            // Add other variants if they exist
+        };
+        mode_str.serialize(serializer)
+    }
+
+    pub fn deserialize<'de, D>(deserializer: D) -> Result<Mode, D::Error>
+    where
+        D: Deserializer<'de>,
+    {
+        let mode_str = String::deserialize(deserializer)?;
+        match mode_str.as_str() {
+            "Insert" => Ok(Mode::Insert),
+            "Overwrite" => Ok(Mode::Overwrite),
+            // Add other variants if they exist
+            _ => Err(serde::de::Error::custom(format!(
+                "Unknown Mode variant: {}",
+                mode_str
+            ))),
+        }
+    }
+}
diff --git a/src/main.rs b/src/main.rs
index ba2242c..7e6a909 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -60,21 +60,6 @@ pub struct Args {
     /// reads from standard input.
     pub input: Option<PathBuf>,
 
-    #[arg(
-        short = 'e',
-        long = "edit-mode",
-        default_value = "insert",
-        value_parser = edit_mode_validator,
-        help = "Edit mode for the interface ('insert' or 'overwrite').",
-        long_help = r#"
-        Specifies the edit mode for the interface.
-        Acceptable values are "insert" or "overwrite".
-        - "insert" inserts a new input at the cursor's position.
-        - "overwrite" mode replaces existing characters with new input at the cursor's position.
-        "#,
-    )]
-    pub edit_mode: text_editor::Mode,
-
     #[arg(
         short = 'n',
         long = "no-hint",
@@ -108,14 +93,6 @@ pub struct Args {
     pub max_streams: Option<usize>,
 }
 
-fn edit_mode_validator(val: &str) -> anyhow::Result<text_editor::Mode> {
-    match val {
-        "insert" | "" => Ok(text_editor::Mode::Insert),
-        "overwrite" => Ok(text_editor::Mode::Overwrite),
-        _ => Err(anyhow!("edit-mode must be 'insert' or 'overwrite'")),
-    }
-}
-
 /// Parses the input based on the provided arguments.
 ///
 /// This function reads input data from either a specified file or standard input.
@@ -221,7 +198,7 @@ async fn main() -> anyhow::Result<()> {
         prefix_style: config.editor.theme_on_focus.prefix_style,
         active_char_style: config.editor.theme_on_focus.active_char_style,
         inactive_char_style: config.editor.theme_on_focus.inactive_char_style,
-        edit_mode: args.edit_mode,
+        edit_mode: config.editor.mode,
         word_break_chars: config.editor.word_break_chars,
         lines: Default::default(),
     };