diff --git a/gradle.properties b/gradle.properties
index 906bd84..282a1eb 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -26,8 +26,8 @@ commonsCollections4Version = 4.4
 ezmorphVersion             = 3.0.0
 jacocoVersion              = 0.8.12
 junitVersion               = 4.13.2
-slf4jVersion               = 1.7.32
-slf4jTestVersion           = 1.2.0
+slf4jVersion               = 2.0.13
+slf4jTestVersion           = 3.0.1
 xmlunitVersion             = 1.6
 xomVersion                 = 1.3.8
 
diff --git a/subprojects/json-lib-core/json-lib-core.gradle b/subprojects/json-lib-core/json-lib-core.gradle
index 423f865..d06f9f4 100644
--- a/subprojects/json-lib-core/json-lib-core.gradle
+++ b/subprojects/json-lib-core/json-lib-core.gradle
@@ -29,5 +29,5 @@ dependencies {
     api("org.kordamp.ezmorph:ezmorph-core:$ezmorphVersion")
 
     testImplementation("xmlunit:xmlunit:$xmlunitVersion")
-    testImplementation("uk.org.lidalia:slf4j-test:$slf4jTestVersion")
+    testImplementation("com.github.valfirst:slf4j-test:$slf4jTestVersion")
 }
diff --git a/subprojects/json-lib-core/src/test/java/org/kordamp/json/xml/TestForcedArrayElementFlag.java b/subprojects/json-lib-core/src/test/java/org/kordamp/json/xml/TestForcedArrayElementFlag.java
index a6825c9..c29e6af 100644
--- a/subprojects/json-lib-core/src/test/java/org/kordamp/json/xml/TestForcedArrayElementFlag.java
+++ b/subprojects/json-lib-core/src/test/java/org/kordamp/json/xml/TestForcedArrayElementFlag.java
@@ -17,13 +17,14 @@
  */
 package org.kordamp.json.xml;
 
-import com.google.common.collect.ImmutableList;
+import org.slf4j.event.Level;
+import com.github.valfirst.slf4jtest.LoggingEvent;
+import com.github.valfirst.slf4jtest.TestLogger;
+import com.github.valfirst.slf4jtest.TestLoggerFactory;
 import junit.framework.TestCase;
 import org.kordamp.json.JSONObject;
-import uk.org.lidalia.slf4jext.Level;
-import uk.org.lidalia.slf4jtest.LoggingEvent;
-import uk.org.lidalia.slf4jtest.TestLogger;
-import uk.org.lidalia.slf4jtest.TestLoggerFactory;
+
+import java.util.List;
 
 import static java.util.Arrays.asList;
 
@@ -87,7 +88,7 @@ public void test_different_elements_should_be_forced_array_with_log_warning() {
         // Check if warning appears in log
         String expectedWarningMessage = "Child elements [GaijiRefMaps,ForcedArrayElement] of forced array element [Properties] are not from the same type";
         boolean expectedWarningFound = false;
-        ImmutableList<LoggingEvent> loggingEvents = logger.getLoggingEvents();
+        List<LoggingEvent> loggingEvents = logger.getLoggingEvents();
         for (LoggingEvent le : loggingEvents) {
             if (le.getLevel() == Level.WARN) { expectedWarningFound = le.getMessage().equals(expectedWarningMessage); }
         }