diff --git a/CHANGELOG.md b/CHANGELOG.md
index f2560e5..a9328cd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,7 @@
 # Development version
 
+# Version 0.5.2 - 2020-07-08
+
 * Make the duplicate search more reliable when running it multiple times without closing the application in between.
 * Fix bug when trying to filter empty cache lists.
 * Enable tests requiring existing logs or write operations again.
diff --git a/build.gradle b/build.gradle
index 402605a..1f87ecb 100644
--- a/build.gradle
+++ b/build.gradle
@@ -6,7 +6,7 @@ plugins {
     id 'com.github.sherter.google-java-format' version '0.9'
 
     // Create runtime images.
-    id 'org.beryx.runtime' version '1.9.1'
+    id 'org.beryx.runtime' version '1.10.0'
 }
 
 // Apply the java plugin to add support for Java.
@@ -58,10 +58,10 @@ project.ext.ocOkapiPropertiesFile = projectDir.getPath() + "${File.separator}oc_
 sourceCompatibility = 1.8
 targetCompatibility = 1.8
 
-version = '0.5.1'
+version = '0.5.2'
 
 wrapper {
-    gradleVersion = '6.5'
+    gradleVersion = '6.5.1'
 }
 
 // Use JUnit 5 for testing.
diff --git a/gradle/keyHelper.gradle b/gradle/keyHelper.gradle
index f744be1..f7b95d3 100644
--- a/gradle/keyHelper.gradle
+++ b/gradle/keyHelper.gradle
@@ -1,3 +1,10 @@
+/**
+ * OKAPI key loader.
+ *
+ * This method has been moved to an external file to improve readability of the main Gradle build
+ * file.
+ */
+
 // Allow retrieving the configuration values from environment variables as well.
 ext.retrieveOcOkapiProperties = { ->
     // Use dummy values as secret environment variables are not available on Travis CI for external