diff --git a/src/compare/diff.rs b/src/compare/diff.rs
index 745f556..f0a1b8d 100644
--- a/src/compare/diff.rs
+++ b/src/compare/diff.rs
@@ -2118,7 +2118,7 @@ fn compare_timestamp<'b, 's>(
     _source: &'s str,
     emacs: &'b Token<'s>,
     rust: &'b Timestamp<'s>,
-) -> Result<DiffEntry<'b, 's>, Box<dyn std::error::Error>> {
+) -> Result<DiffEntry<'b, 's>, Box<dyn std::error::Error + 's>> {
     let mut this_status = DiffStatus::Good;
     let mut message = None;
 
diff --git a/src/compare/util.rs b/src/compare/util.rs
index 6f1c922..0a96f49 100644
--- a/src/compare/util.rs
+++ b/src/compare/util.rs
@@ -243,10 +243,10 @@ pub(crate) fn get_property_boolean<'b, 's, 'x>(
 pub(crate) fn get_property_numeric<'b, 's, 'x, N: FromStr>(
     emacs: &'b Token<'s>,
     key: &'x str,
-) -> Result<Option<N>, Box<dyn std::error::Error>>
+) -> Result<Option<N>, Box<dyn std::error::Error + 's>>
 where
     <N as FromStr>::Err: std::error::Error,
-    <N as FromStr>::Err: 'static,
+    <N as FromStr>::Err: 's,
 {
     let foo = get_property(emacs, key)?
         .map(Token::as_atom)