diff --git a/pom.xml b/pom.xml
index 68395e6..1e5d669 100644
--- a/pom.xml
+++ b/pom.xml
@@ -28,11 +28,18 @@
 			<scope>test</scope>
 		</dependency>
 		<dependency>
-			<groupId>log4j</groupId>
-			<artifactId>log4j</artifactId>
-			<version>1.2.17</version>
+			<groupId>org.slf4j</groupId>
+			<artifactId>slf4j-api</artifactId>
+			<version>1.7.18</version>
 			<type>jar</type>
 		</dependency>
+        <dependency>
+            <groupId>org.slf4j</groupId>
+            <artifactId>slf4j-jdk14</artifactId>
+            <version>1.7.18</version>
+            <type>jar</type>
+            <scope>test</scope>
+        </dependency>
 		<dependency>
 			<groupId>dnsjava</groupId>
 			<artifactId>dnsjava</artifactId>
diff --git a/src/main/java/org/jitsi/dnssec/SMessage.java b/src/main/java/org/jitsi/dnssec/SMessage.java
index 0f69e33..22631f7 100644
--- a/src/main/java/org/jitsi/dnssec/SMessage.java
+++ b/src/main/java/org/jitsi/dnssec/SMessage.java
@@ -45,7 +45,8 @@
 import java.util.LinkedList;
 import java.util.List;
 
-import org.apache.log4j.Logger;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.xbill.DNS.Flags;
 import org.xbill.DNS.Header;
 import org.xbill.DNS.Message;
@@ -63,7 +64,7 @@
  * @author davidb
  */
 public class SMessage {
-    private static final Logger logger = Logger.getLogger(SMessage.class);
+    private static final Logger logger = LoggerFactory.getLogger(SMessage.class);
     private static final SRRset[] EMPTY_SRRSET_ARRAY = new SRRset[0];
     private static final int NUM_SECTIONS = 3;
     private static final int MAX_FLAGS = 16;
diff --git a/src/main/java/org/jitsi/dnssec/validator/DnsSecVerifier.java b/src/main/java/org/jitsi/dnssec/validator/DnsSecVerifier.java
index 740afc4..aa52bb5 100644
--- a/src/main/java/org/jitsi/dnssec/validator/DnsSecVerifier.java
+++ b/src/main/java/org/jitsi/dnssec/validator/DnsSecVerifier.java
@@ -44,8 +44,9 @@
 import java.util.Iterator;
 import java.util.List;
 
-import org.apache.log4j.Logger;
 import org.jitsi.dnssec.SecurityStatus;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.xbill.DNS.DNSKEYRecord;
 import org.xbill.DNS.DNSSEC;
 import org.xbill.DNS.DNSSEC.DNSSECException;
@@ -61,7 +62,7 @@
  * @version $Revision: 361 $
  */
 public class DnsSecVerifier {
-    private static final Logger logger = Logger.getLogger(DnsSecVerifier.class);
+    private static final Logger logger = LoggerFactory.getLogger(DnsSecVerifier.class);
 
     /**
      * Find the matching DNSKEY(s) to an RRSIG within a DNSKEY rrset. Normally
diff --git a/src/main/java/org/jitsi/dnssec/validator/KeyEntry.java b/src/main/java/org/jitsi/dnssec/validator/KeyEntry.java
index 698ea2d..34b5605 100644
--- a/src/main/java/org/jitsi/dnssec/validator/KeyEntry.java
+++ b/src/main/java/org/jitsi/dnssec/validator/KeyEntry.java
@@ -40,7 +40,8 @@
 
 package org.jitsi.dnssec.validator;
 
-import org.apache.log4j.Logger;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.jitsi.dnssec.SRRset;
 import org.xbill.DNS.Name;
 
@@ -48,7 +49,7 @@
  * DNSKEY cache entry for a given {@link Name}, with or without actual keys.
  */
 public final class KeyEntry {
-    private static final Logger logger = Logger.getLogger(KeyEntry.class);
+    private static final Logger logger = LoggerFactory.getLogger(KeyEntry.class);
 
     private SRRset rrset;
     private Name name;
diff --git a/src/main/java/org/jitsi/dnssec/validator/NSEC3ValUtils.java b/src/main/java/org/jitsi/dnssec/validator/NSEC3ValUtils.java
index 1f26e94..9d1e4fd 100644
--- a/src/main/java/org/jitsi/dnssec/validator/NSEC3ValUtils.java
+++ b/src/main/java/org/jitsi/dnssec/validator/NSEC3ValUtils.java
@@ -52,7 +52,8 @@
 import java.util.Properties;
 import java.util.TreeMap;
 
-import org.apache.log4j.Logger;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.jitsi.dnssec.SRRset;
 import org.jitsi.dnssec.SecurityStatus;
 import org.xbill.DNS.DNSKEYRecord;
@@ -71,7 +72,7 @@
  */
 final class NSEC3ValUtils {
     // The logger to use in static methods.
-    private static final Logger logger = Logger.getLogger(NSEC3ValUtils.class);
+    private static final Logger logger = LoggerFactory.getLogger(NSEC3ValUtils.class);
 
     private static final Name ASTERISK_LABEL = Name.fromConstantString("*");
 
diff --git a/src/main/java/org/jitsi/dnssec/validator/ValUtils.java b/src/main/java/org/jitsi/dnssec/validator/ValUtils.java
index 23605c0..8cb7251 100644
--- a/src/main/java/org/jitsi/dnssec/validator/ValUtils.java
+++ b/src/main/java/org/jitsi/dnssec/validator/ValUtils.java
@@ -43,7 +43,8 @@
 import java.util.Iterator;
 import java.util.Properties;
 
-import org.apache.log4j.Logger;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.jitsi.dnssec.R;
 import org.jitsi.dnssec.SMessage;
 import org.jitsi.dnssec.SRRset;
@@ -71,7 +72,7 @@
  * @author davidb
  */
 public class ValUtils {
-    private static final Logger logger = Logger.getLogger(ValUtils.class);
+    private static final Logger logger = LoggerFactory.getLogger(ValUtils.class);
 
     private static final Name WILDCARD = Name.fromConstantString("*");
 
diff --git a/src/main/java/org/jitsi/dnssec/validator/ValidatingResolver.java b/src/main/java/org/jitsi/dnssec/validator/ValidatingResolver.java
index 1cc1c13..cc832b6 100644
--- a/src/main/java/org/jitsi/dnssec/validator/ValidatingResolver.java
+++ b/src/main/java/org/jitsi/dnssec/validator/ValidatingResolver.java
@@ -53,7 +53,8 @@
 import java.util.Map;
 import java.util.Properties;
 
-import org.apache.log4j.Logger;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.jitsi.dnssec.SMessage;
 import org.jitsi.dnssec.SRRset;
 import org.jitsi.dnssec.SecurityStatus;
@@ -89,7 +90,7 @@ public class ValidatingResolver implements Resolver {
      */
     public static final int VALIDATION_REASON_QCLASS = 65280;
 
-    private static final Logger logger = Logger.getLogger(ValidatingResolver.class);
+    private static final Logger logger = LoggerFactory.getLogger(ValidatingResolver.class);
 
     /**
      * This is the TTL to use when a trust anchor priming query failed to
diff --git a/src/test/java/org/jitsi/dnssec/TestBase.java b/src/test/java/org/jitsi/dnssec/TestBase.java
index 2352935..9caf608 100644
--- a/src/test/java/org/jitsi/dnssec/TestBase.java
+++ b/src/test/java/org/jitsi/dnssec/TestBase.java
@@ -21,12 +21,8 @@
 import java.util.HashMap;
 import java.util.Iterator;
 import java.util.Map;
+import java.util.logging.LogManager;
 
-import org.apache.log4j.Appender;
-import org.apache.log4j.ConsoleAppender;
-import org.apache.log4j.Level;
-import org.apache.log4j.Logger;
-import org.apache.log4j.PatternLayout;
 import org.jitsi.dnssec.validator.ValidatingResolver;
 import org.joda.time.DateTime;
 import org.joda.time.format.ISODateTimeFormat;
@@ -65,13 +61,12 @@ private final static boolean record = Boolean.getBoolean("org.jitsi.dnssecjava.r
     protected ValidatingResolver resolver;
     protected String testName;
 
-    {
-        Logger root = Logger.getRootLogger();
-        if (root.getAppender("junit") == null) {
-            root.setLevel(Level.ALL);
-            Appender junit = new ConsoleAppender(new PatternLayout("%r %c{2}.%M.%L - %m%n"));
-            junit.setName("junit");
-            root.addAppender(junit);
+    static {
+        try {
+            LogManager.getLogManager().readConfiguration(TestBase.class.getResourceAsStream("logging.properties"));
+        }
+        catch (Exception e) {
+            throw new RuntimeException(e);
         }
     }
 
diff --git a/src/test/resources/org/jitsi/dnssec/logging.properties b/src/test/resources/org/jitsi/dnssec/logging.properties
new file mode 100644
index 0000000..60e297f
--- /dev/null
+++ b/src/test/resources/org/jitsi/dnssec/logging.properties
@@ -0,0 +1,5 @@
+# java.util.logging configuration
+
+handlers = java.util.logging.ConsoleHandler
+java.util.logging.ConsoleHandler.level = ALL
+.level = ALL