diff --git a/internal/contracts/bounds.go b/internal/contracts/bounds.go
index c54d515..8b09e82 100644
--- a/internal/contracts/bounds.go
+++ b/internal/contracts/bounds.go
@@ -30,8 +30,8 @@ type SessionBounds struct {
 	ExcludedPrefixSummary string `json:"excluded_prefix_summary"`
 	ExcludedSuffixSummary string `json:"excluded_suffix_summary"`
 	Warnings              []any  `json:"warnings"`
-	StartEvidence         []any  `json:"start_evidence"`
-	EndEvidence           []any  `json:"end_evidence"`
+	StartEvidence         any    `json:"start_evidence"`
+	EndEvidence           any    `json:"end_evidence"`
 }
 
 // ParseSessionBoundsFile reads and parses one Scriptorium bounds output JSON file.