diff --git a/Package.swift b/Package.swift
index abe05d19..c5460e1c 100644
--- a/Package.swift
+++ b/Package.swift
@@ -23,7 +23,7 @@ let package = Package(
         .package(
             name: "Sovran",
             url: "https://github.com/segmentio/Sovran-Swift.git",
-            from: "1.0.2"
+            from: "1.0.3"
         )
     ],
     targets: [
diff --git a/Segment.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved b/Segment.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved
index 4e9f23ef..78657c8b 100644
--- a/Segment.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved
+++ b/Segment.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved
@@ -6,8 +6,8 @@
         "repositoryURL": "git@github.com:segmentio/Sovran-Swift.git",
         "state": {
           "branch": null,
-          "revision": "be79aad4393d36959f422c2b40566b84ee1170f7",
-          "version": "1.0.2"
+          "revision": "944c17d7c46bd95fc37f09136cabd172be5b413b",
+          "version": "1.0.3"
         }
       }
     ]
diff --git a/Sources/Segment/Utilities/JSON.swift b/Sources/Segment/Utilities/JSON.swift
index 006b4a9c..6d35d76a 100644
--- a/Sources/Segment/Utilities/JSON.swift
+++ b/Sources/Segment/Utilities/JSON.swift
@@ -21,6 +21,7 @@ public enum JSON: Equatable {
     private enum JSONError: Error {
         case unknown
         case nonJSONType(type: String)
+        case incorrectType
     }
     
     public init(_ object: [String: Any]) throws {
@@ -302,7 +303,7 @@ extension JSON {
             newArray.append(value)
             result = try JSON(newArray)
         default:
-            throw "This JSON object is not an array type."
+            throw JSONError.incorrectType
         }
         return result
     }
@@ -325,7 +326,7 @@ extension JSON {
             newObject[key] = value
             result = try JSON(newObject)
         default:
-            throw "This JSON object is not an array type."
+            throw JSONError.incorrectType
         }
         return result
     }
@@ -347,7 +348,7 @@ extension JSON {
             newObject.removeValue(forKey: key)
             result = try JSON(newObject)
         default:
-            throw "This JSON object is not an array type."
+            throw JSONError.incorrectType
         }
         return result