diff --git a/actix/src/digest/middleware.rs b/actix/src/digest/middleware.rs
index 559ed3f..fe016ef 100644
--- a/actix/src/digest/middleware.rs
+++ b/actix/src/digest/middleware.rs
@@ -51,14 +51,14 @@ pub struct VerifyMiddleware<T, S>(S, bool, T);
 #[error("Error verifying digest")]
 #[doc(hidden)]
 pub struct VerifyError {
-    context: SpanTrace,
+    context: String,
     kind: VerifyErrorKind,
 }
 
 impl VerifyError {
     fn new(span: &Span, kind: VerifyErrorKind) -> Self {
         span.in_scope(|| VerifyError {
-            context: SpanTrace::capture(),
+            context: SpanTrace::capture().to_string(),
             kind,
         })
     }
diff --git a/actix/src/middleware.rs b/actix/src/middleware.rs
index 4bf6ee6..8b22205 100644
--- a/actix/src/middleware.rs
+++ b/actix/src/middleware.rs
@@ -75,7 +75,7 @@ impl std::fmt::Display for HeaderKind {
 #[derive(Clone)]
 #[doc(hidden)]
 pub struct VerifyError {
-    context: SpanTrace,
+    context: String,
     kind: VerifyErrorKind,
 }
 
@@ -125,7 +125,7 @@ enum VerifyErrorKind {
 impl VerifyError {
     fn new(span: &Span, kind: VerifyErrorKind) -> Self {
         span.in_scope(|| VerifyError {
-            context: SpanTrace::capture(),
+            context: SpanTrace::capture().to_string(),
             kind,
         })
     }