diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4d52d8d..b337591 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,7 +4,7 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [Unreleased] - 2023-08-06
+## [Unreleased] - 2023-08-07
 
 ### Added
   
@@ -15,22 +15,30 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Removed
 
 ### Fixed
-* LogRecord.toString() changed to use platform-specific line separators.
-* LogRecord.equals(Object): correctly handle null and other types.
-* RecordList.equals(Object): correctly handle null and other types.
-* Bin.contentsToString(): StringBuilder instead of iterated concat.
-* SessionLog.moveCountToString(): StringBuilder instead of iterated concat.
-* SessionLogFormatter: fixed potential resource leak.
-* SessionLog: implemented readObject to properly initialize transient fields during deserialization.
-* Set most classes to package access.
 
 ### CI/CD
-* Integrated SpotBugs into build process.
-* Integrated Find Security Bugs into build process.
 
 ### Other
 
 
+## [3.1.5] - 2023-08-07
+
+### Fixed
+* Improvements based on SpotBugs and FindSecBugs scans:
+  * LogRecord.toString() changed to use platform-specific line separators.
+  * LogRecord.equals(Object): correctly handle null and other types.
+  * RecordList.equals(Object): correctly handle null and other types.
+  * Bin.contentsToString(): StringBuilder instead of iterated concat.
+  * SessionLog.moveCountToString(): StringBuilder instead of iterated concat.
+  * SessionLogFormatter: fixed potential resource leak.
+  * SessionLog: implemented readObject to properly initialize transient fields during deserialization.
+  * Set most classes to package access.
+
+### CI/CD
+* Integrated SpotBugs into build process.
+* Integrated FindSecBugs into build process.
+
+
 ## [3.1.4] - 2023-01-12
 
 ### Fixed
diff --git a/src/main/java/org/cicirello/ibp/InteractiveBinPacking.java b/src/main/java/org/cicirello/ibp/InteractiveBinPacking.java
index 006580a..035ac23 100644
--- a/src/main/java/org/cicirello/ibp/InteractiveBinPacking.java
+++ b/src/main/java/org/cicirello/ibp/InteractiveBinPacking.java
@@ -39,10 +39,10 @@
 public class InteractiveBinPacking extends JFrame {
 
   /** Font used for all elements in the main JPanel and its sub-panels. */
-  public static final Font font = new Font("SansSerif", Font.BOLD, 16);
+  static final Font font = new Font("SansSerif", Font.BOLD, 16);
 
   /** Icon to use for application's JFrame and Dialogs */
-  public static final Image icon =
+  static final Image icon =
       new ImageIcon(InteractiveBinPacking.class.getResource("images/logo.png")).getImage();
 
   /** Constructs the UI. */