diff --git a/src/parser/nom_context.rs b/src/parser/nom_context.rs
index 92b6899..91a374b 100644
--- a/src/parser/nom_context.rs
+++ b/src/parser/nom_context.rs
@@ -71,8 +71,8 @@ impl<'r> NomContext<'r> {
     }
 }
 
-impl<'a, 'b> Parser<&'b str, &'b str, VerboseError<&'b str>> for FailChecker<'a> {
-    fn parse(&mut self, i: &'b str) -> IResult<&'b str, &'b str, VerboseError<&'b str>> {
+impl<'r, 's> Parser<&'s str, &'s str, VerboseError<&'s str>> for FailChecker<'r> {
+    fn parse(&mut self, i: &'s str) -> IResult<&'s str, &'s str, VerboseError<&'s str>> {
         let fail_func = match &self.0.fail_matcher {
             ChainBehavior::AndParent(inner) => inner,
             ChainBehavior::IgnoreParent(inner) => inner,