diff --git a/build.gradle b/build.gradle
index 665d486..2a17a1a 100644
--- a/build.gradle
+++ b/build.gradle
@@ -29,7 +29,7 @@ dependencies {
     testImplementation 'io.jsonwebtoken:jjwt-jackson:0.12.6'
 
     implementation 'com.vonage:jwt:2.0.1'
-    implementation 'commons-lang:commons-lang:2.6'
+    implementation 'org.apache.commons:commons-lang3:3.18.0'
     implementation 'commons-codec:commons-codec:1.18.0'
     implementation 'io.netty:netty-codec-http:4.1.119.Final'
     implementation 'io.netty:netty-handler:4.1.119.Final'
diff --git a/src/main/java/com/opentok/AudioConnectorProperties.java b/src/main/java/com/opentok/AudioConnectorProperties.java
index 95cf544..eb02e98 100644
--- a/src/main/java/com/opentok/AudioConnectorProperties.java
+++ b/src/main/java/com/opentok/AudioConnectorProperties.java
@@ -7,7 +7,7 @@
  */
 package com.opentok;
 
-import org.apache.commons.lang.StringUtils;
+import org.apache.commons.lang3.StringUtils;
 
 import java.net.URI;
 import java.util.*;
diff --git a/src/main/java/com/opentok/OpenTok.java b/src/main/java/com/opentok/OpenTok.java
index 81fccc4..758205b 100644
--- a/src/main/java/com/opentok/OpenTok.java
+++ b/src/main/java/com/opentok/OpenTok.java
@@ -18,7 +18,7 @@
 import com.opentok.util.Crypto;
 import com.opentok.util.HttpClient;
 import com.opentok.util.HttpClient.ProxyAuthScheme;
-import org.apache.commons.lang.StringUtils;
+import org.apache.commons.lang3.StringUtils;
 import java.io.IOException;
 import java.io.UnsupportedEncodingException;
 import java.net.Proxy;
diff --git a/src/main/java/com/opentok/util/HttpClient.java b/src/main/java/com/opentok/util/HttpClient.java
index bf4e807..61f31ac 100644
--- a/src/main/java/com/opentok/util/HttpClient.java
+++ b/src/main/java/com/opentok/util/HttpClient.java
@@ -21,7 +21,7 @@
 import com.opentok.exception.OpenTokException;
 import com.opentok.exception.RequestException;
 import com.vonage.jwt.Jwt;
-import org.apache.commons.lang.StringUtils;
+import org.apache.commons.lang3.StringUtils;
 import org.asynchttpclient.*;
 import org.asynchttpclient.Realm.AuthScheme;
 import org.asynchttpclient.filter.FilterContext;
diff --git a/src/test/java/com/opentok/OpenTokTest.java b/src/test/java/com/opentok/OpenTokTest.java
index 86f8a94..07f7d59 100644
--- a/src/test/java/com/opentok/OpenTokTest.java
+++ b/src/test/java/com/opentok/OpenTokTest.java
@@ -20,7 +20,7 @@
 import com.opentok.exception.OpenTokException;
 import com.opentok.exception.RequestException;
 import io.jsonwebtoken.Jwts;
-import org.apache.commons.lang.StringUtils;
+import org.apache.commons.lang3.StringUtils;
 import org.junit.Before;
 import org.junit.Rule;
 import org.junit.Test;