diff --git a/MMOItems-API/pom.xml b/MMOItems-API/pom.xml
index 6d3ba447..e979f2f2 100644
--- a/MMOItems-API/pom.xml
+++ b/MMOItems-API/pom.xml
@@ -84,6 +84,12 @@
             <url>https://repo.extendedclip.com/content/repositories/placeholderapi/</url>
         </repository>
 
+        <!-- ProtocolLib -->
+        <repository>
+            <id>dmulloy2-repo</id>
+            <url>https://repo.dmulloy2.net/repository/public/</url>
+        </repository>
+
     </repositories>
 
     <!--
@@ -254,7 +260,7 @@
         <dependency>
             <groupId>com.comphenix.protocol</groupId>
             <artifactId>ProtocolLib</artifactId>
-            <version>4.7.0</version>
+            <version>5.1.0</version>
             <scope>provided</scope>
             <optional>true</optional>
         </dependency>