diff --git a/Sources/AnyCodable/AnyEncodable.swift b/Sources/AnyCodable/AnyEncodable.swift
index d5530e5..c166319 100644
--- a/Sources/AnyCodable/AnyEncodable.swift
+++ b/Sources/AnyCodable/AnyEncodable.swift
@@ -58,6 +58,10 @@ extension _AnyEncodable {
         #endif
         case is Void:
             try container.encodeNil()
+        #if canImport(Foundation)
+        case let number as NSNumber:
+            try encode(nsnumber: number, into: &container)
+        #endif
         case let bool as Bool:
             try container.encode(bool)
         case let int as Int:
@@ -87,8 +91,6 @@ extension _AnyEncodable {
         case let string as String:
             try container.encode(string)
         #if canImport(Foundation)
-        case let number as NSNumber:
-            try encode(nsnumber: number, into: &container)
         case let date as Date:
             try container.encode(date)
         case let url as URL:
@@ -108,6 +110,11 @@ extension _AnyEncodable {
 
     #if canImport(Foundation)
     private func encode(nsnumber: NSNumber, into container: inout SingleValueEncodingContainer) throws {
+        if CFGetTypeID(nsnumber) == CFBooleanGetTypeID() {
+            try container.encode(nsnumber.boolValue)
+            return
+        }
+
         switch Character(Unicode.Scalar(UInt8(nsnumber.objCType.pointee)))  {
         case "B":
             try container.encode(nsnumber.boolValue)
diff --git a/Tests/AnyCodableTests/AnyEncodableTests.swift b/Tests/AnyCodableTests/AnyEncodableTests.swift
index bd81b70..71c2067 100644
--- a/Tests/AnyCodableTests/AnyEncodableTests.swift
+++ b/Tests/AnyCodableTests/AnyEncodableTests.swift
@@ -124,6 +124,17 @@ class AnyEncodableTests: XCTestCase {
         XCTAssert(encodedJSONObject["double"] is Double)
     }
 
+    func testEncodeNSNumberOneAndZeroAsInt() throws {
+        let dictionary: [NSNumber] = [0, 1]
+
+        let encoder = JSONEncoder()
+
+        let json = try encoder.encode(AnyEncodable(dictionary))
+        let jsonString = String(data: json, encoding: .utf8)!
+
+        XCTAssertEqual(jsonString, "[0,1]")
+    }
+
     func testStringInterpolationEncoding() throws {
         let dictionary: [String: AnyEncodable] = [
             "boolean": "\(true)",