diff --git a/sgf/src/go.rs b/sgf/src/go.rs
index 0597fbb..1f9f273 100644
--- a/sgf/src/go.rs
+++ b/sgf/src/go.rs
@@ -70,30 +70,15 @@
 
 use crate::{
     date::{self, parse_date_field, Date},
-    tree::{parse_collection, ParseSizeError, Size},
-    Error,
+    tree::{parse_collection, Size},
+    Error, VerboseNomError,
 };
+use nom::error::VerboseError;
 use serde::{Deserialize, Serialize};
 use typeshare::typeshare;
 
 pub struct Game {}
 
-impl<'a> From<nom::Err<nom::error::VerboseError<&'a str>>> for Error<'a> {
-    fn from(err: nom::Err<nom::error::VerboseError<&'a str>>) -> Self {
-        match err {
-            nom::Err::Incomplete(_) => Error::Incomplete,
-            nom::Err::Error(e) => Error::InvalidSgf(e.clone()),
-            nom::Err::Failure(e) => Error::InvalidSgf(e.clone()),
-        }
-    }
-}
-
-impl<'a> From<ParseSizeError> for Error<'a> {
-    fn from(_: ParseSizeError) -> Self {
-        Self::InvalidBoardSize
-    }
-}
-
 #[derive(Clone, Copy, Debug, PartialEq, Eq, Serialize, Deserialize)]
 #[typeshare]
 pub enum Rank {
@@ -236,8 +221,8 @@ enum PropValue {
 }
 */
 
-pub fn parse_sgf<'a>(input: &'a str) -> Result<Vec<GameTree>, Error<'a>> {
-    let (_, trees) = parse_collection::<nom::error::VerboseError<&'a str>>(input)?;
+pub fn parse_sgf(input: &str) -> Result<Vec<GameTree>, Error> {
+    let (_, trees) = parse_collection::<nom::error::VerboseError<&str>>(input)?;
 
     let games = trees
         .into_iter()
diff --git a/sgf/src/lib.rs b/sgf/src/lib.rs
index 485267f..73f965a 100644
--- a/sgf/src/lib.rs
+++ b/sgf/src/lib.rs
@@ -10,11 +10,36 @@ use tree::parse_collection;
 use thiserror::Error;
 
 #[derive(Debug)]
-pub enum Error<'a> {
+pub enum Error {
     InvalidField,
     InvalidBoardSize,
     Incomplete,
-    InvalidSgf(nom::error::VerboseError<&'a str>),
+    InvalidSgf(VerboseNomError),
+}
+
+#[derive(Debug)]
+pub struct VerboseNomError(nom::error::VerboseError<String>);
+
+impl From<nom::error::VerboseError<&str>> for VerboseNomError {
+    fn from(err: nom::error::VerboseError<&str>) -> Self {
+        VerboseNomError(nom::error::VerboseError {
+            errors: err
+                .errors
+                .into_iter()
+                .map(|err| (err.0.to_owned(), err.1))
+                .collect(),
+        })
+    }
+}
+
+impl From<nom::Err<nom::error::VerboseError<&str>>> for Error {
+    fn from(err: nom::Err<nom::error::VerboseError<&str>>) -> Self {
+        match err {
+            nom::Err::Incomplete(_) => Error::Incomplete,
+            nom::Err::Error(e) => Error::InvalidSgf(VerboseNomError::from(e)),
+            nom::Err::Failure(e) => Error::InvalidSgf(VerboseNomError::from(e)),
+        }
+    }
 }
 
 #[derive(Debug, PartialEq, Error)]
@@ -37,8 +62,8 @@ pub enum Game {
     Unsupported(tree::Tree),
 }
 
-pub fn parse_sgf<'a>(input: &'a str) -> Result<Vec<Game>, Error<'a>> {
-    let (_, trees) = parse_collection::<nom::error::VerboseError<&'a str>>(input)?;
+pub fn parse_sgf(input: &str) -> Result<Vec<Game>, Error> {
+    let (_, trees) = parse_collection::<nom::error::VerboseError<&str>>(input)?;
     Ok(trees
         .into_iter()
         .map(|t| match t.sequence[0].find_prop("GM") {
diff --git a/sgf/src/tree.rs b/sgf/src/tree.rs
index 317be80..c0d46ff 100644
--- a/sgf/src/tree.rs
+++ b/sgf/src/tree.rs
@@ -10,6 +10,12 @@ use nom::{
 };
 use std::num::ParseIntError;
 
+impl From<ParseSizeError> for Error {
+    fn from(_: ParseSizeError) -> Self {
+        Self::InvalidBoardSize
+    }
+}
+
 #[derive(Debug)]
 pub enum ParseSizeError {
     ParseIntError(ParseIntError),