diff --git a/01-access-control-code-organization-and-testing/projects/challenge/01-access-control-code-organization-challenge.playground/Contents.swift b/01-access-control-code-organization-and-testing/projects/challenge/01-access-control-code-organization-challenge.playground/Contents.swift
index 96a3f83..0355f1b 100644
--- a/01-access-control-code-organization-and-testing/projects/challenge/01-access-control-code-organization-challenge.playground/Contents.swift
+++ b/01-access-control-code-organization-and-testing/projects/challenge/01-access-control-code-organization-challenge.playground/Contents.swift
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2023 Kodeco LLC
+ * Copyright (c) 2025 Kodeco LLC
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
diff --git a/01-access-control-code-organization-and-testing/projects/challenge/01-access-control-mini-exercises.playground/Contents.swift b/01-access-control-code-organization-and-testing/projects/challenge/01-access-control-mini-exercises.playground/Contents.swift
index 18319e9..5deb51a 100644
--- a/01-access-control-code-organization-and-testing/projects/challenge/01-access-control-mini-exercises.playground/Contents.swift
+++ b/01-access-control-code-organization-and-testing/projects/challenge/01-access-control-mini-exercises.playground/Contents.swift
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2023 Kodeco LLC
+ * Copyright (c) 2025 Kodeco LLC
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
diff --git a/01-access-control-code-organization-and-testing/projects/final/01-access-control-code-organization.playground/Contents.swift b/01-access-control-code-organization-and-testing/projects/final/01-access-control-code-organization.playground/Contents.swift
index 34e1217..eb6faee 100644
--- a/01-access-control-code-organization-and-testing/projects/final/01-access-control-code-organization.playground/Contents.swift
+++ b/01-access-control-code-organization-and-testing/projects/final/01-access-control-code-organization.playground/Contents.swift
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2023 Kodeco LLC
+ * Copyright (c) 2025 Kodeco LLC
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
diff --git a/03-result-builders/projects/final/ResultBuilders.playground/Contents.swift b/03-result-builders/projects/final/ResultBuilders.playground/Contents.swift
index 2cfb89d..65e8a30 100644
--- a/03-result-builders/projects/final/ResultBuilders.playground/Contents.swift
+++ b/03-result-builders/projects/final/ResultBuilders.playground/Contents.swift
@@ -1,4 +1,4 @@
-/// Copyright (c) 2023 Kodeco LLC
+/// Copyright (c) 2025 Kodeco LLC
 ///
 /// Permission is hereby granted, free of charge, to any person obtaining a copy
 /// of this software and associated documentation files (the "Software"), to deal
diff --git a/03-result-builders/projects/final/ResultBuilders.playground/timeline.xctimeline b/03-result-builders/projects/final/ResultBuilders.playground/timeline.xctimeline
deleted file mode 100644
index bce7a17..0000000
--- a/03-result-builders/projects/final/ResultBuilders.playground/timeline.xctimeline
+++ /dev/null
@@ -1,24 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<Timeline
-   version = "3.0">
-   <TimelineItems>
-      <LoggerValueHistoryTimelineItem
-         documentLocation = "file:///Users/elig/Desktop/dev/kodeco/sabb-materials/03-result-builders/projects/final/ResultBuilders.playground#CharacterRangeLen=23&amp;CharacterRangeLoc=608&amp;EndingColumnNumber=53&amp;EndingLineNumber=10&amp;StartingColumnNumber=30&amp;StartingLineNumber=10&amp;Timestamp=699568893.666406"
-         lockedSize = "{247, 76}"
-         selectedRepresentationIndex = "0"
-         shouldTrackSuperviewWidth = "NO">
-      </LoggerValueHistoryTimelineItem>
-      <LoggerValueHistoryTimelineItem
-         documentLocation = "file:///Users/elig/Desktop/dev/kodeco/sabb-materials/03-result-builders/projects/final/ResultBuilders.playground#CharacterRangeLen=46&amp;CharacterRangeLoc=3515&amp;EndingColumnNumber=16&amp;EndingLineNumber=85&amp;StartingColumnNumber=11&amp;StartingLineNumber=83&amp;Timestamp=699568893.666526"
-         lockedSize = "{324, 187}"
-         selectedRepresentationIndex = "0"
-         shouldTrackSuperviewWidth = "NO">
-      </LoggerValueHistoryTimelineItem>
-      <LoggerValueHistoryTimelineItem
-         documentLocation = "file:///Users/elig/Desktop/dev/kodeco/sabb-materials/03-result-builders/projects/final/ResultBuilders.playground#CharacterRangeLen=46&amp;CharacterRangeLoc=5304&amp;EndingColumnNumber=0&amp;EndingLineNumber=162&amp;StartingColumnNumber=1&amp;StartingLineNumber=161&amp;Timestamp=699568893.6666321"
-         lockedSize = "{1221, 157}"
-         selectedRepresentationIndex = "0"
-         shouldTrackSuperviewWidth = "NO">
-      </LoggerValueHistoryTimelineItem>
-   </TimelineItems>
-</Timeline>
diff --git a/06-encoding-and-decoding-types/projects/challenge/06-codable-serialization-challeges.playground/Contents.swift b/06-encoding-and-decoding-types/projects/challenge/06-codable-serialization-challeges.playground/Contents.swift
index 02981b5..43ca62a 100644
--- a/06-encoding-and-decoding-types/projects/challenge/06-codable-serialization-challeges.playground/Contents.swift
+++ b/06-encoding-and-decoding-types/projects/challenge/06-codable-serialization-challeges.playground/Contents.swift
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2023 Kodeco LLC
+ * Copyright (c) 2025 Kodeco LLC
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
diff --git a/06-encoding-and-decoding-types/projects/challenge/06-codable-serialization-challeges.playground/contents.xcplayground b/06-encoding-and-decoding-types/projects/challenge/06-codable-serialization-challeges.playground/contents.xcplayground
index 89da2d4..41f6c16 100644
--- a/06-encoding-and-decoding-types/projects/challenge/06-codable-serialization-challeges.playground/contents.xcplayground
+++ b/06-encoding-and-decoding-types/projects/challenge/06-codable-serialization-challeges.playground/contents.xcplayground
@@ -1,4 +1,2 @@
 <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
-<playground version='5.0' target-platform='ios' display-mode='rendered'>
-    <timeline fileName='timeline.xctimeline'/>
-</playground>
\ No newline at end of file
+<playground version='7.0' target-platform='ios' swift-version='6' display-mode='rendered'/>
\ No newline at end of file
diff --git a/06-encoding-and-decoding-types/projects/final/06-codable-serialization.playground/Contents.swift b/06-encoding-and-decoding-types/projects/final/06-codable-serialization.playground/Contents.swift
index d03a152..2a3d198 100644
--- a/06-encoding-and-decoding-types/projects/final/06-codable-serialization.playground/Contents.swift
+++ b/06-encoding-and-decoding-types/projects/final/06-codable-serialization.playground/Contents.swift
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2023 Kodeco LLC
+ * Copyright (c) 2025 Kodeco LLC
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
@@ -98,7 +98,9 @@ class EncoderDecoderTests: XCTestCase {
     XCTAssertNotNil(jsonData, "Encoding failed")
     
     let jsonString = String(data: jsonData!, encoding: .utf8)!
-    XCTAssertEqual(jsonString, "{\"name\":\"John Appleseed\",\"gift\":\"Teddy Bear\",\"employeeId\":7}")
+    XCTAssert(jsonString.contains("\"employeeId\":7"))
+    XCTAssert(jsonString.contains("\"gift\":\"Teddy Bear\""))
+    XCTAssert(jsonString.contains("\"name\":\"John Appleseed\""))
   }
   
   func testDecoder() {
diff --git a/06-encoding-and-decoding-types/projects/final/06-codable-serialization.playground/contents.xcplayground b/06-encoding-and-decoding-types/projects/final/06-codable-serialization.playground/contents.xcplayground
index 5da2641..707a0fb 100644
--- a/06-encoding-and-decoding-types/projects/final/06-codable-serialization.playground/contents.xcplayground
+++ b/06-encoding-and-decoding-types/projects/final/06-codable-serialization.playground/contents.xcplayground
@@ -1,4 +1,2 @@
 <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
-<playground version='5.0' target-platform='ios'>
-    <timeline fileName='timeline.xctimeline'/>
-</playground>
\ No newline at end of file
+<playground version='7.0' target-platform='ios' swift-version='6'/>
\ No newline at end of file