diff --git a/build.gradle.kts b/build.gradle.kts
index f7ff25b8..f1392b18 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -8,7 +8,7 @@ plugins {
 
 allprojects {
     group = "nl.matsv"
-    version = "3.3.0-21w15a"
+    version = "4.0.0-21w16a"
     description = "Allow older clients to join newer server versions."
 }
 
diff --git a/common/src/main/java/nl/matsv/viabackwards/api/ViaBackwardsPlatform.java b/common/src/main/java/nl/matsv/viabackwards/api/ViaBackwardsPlatform.java
index a90bffc2..28c6c06f 100644
--- a/common/src/main/java/nl/matsv/viabackwards/api/ViaBackwardsPlatform.java
+++ b/common/src/main/java/nl/matsv/viabackwards/api/ViaBackwardsPlatform.java
@@ -54,7 +54,7 @@ import java.util.logging.Logger;
 
 public interface ViaBackwardsPlatform {
 
-    String MINIMUM_VV_VERSION = "3.3.0";
+    String MINIMUM_VV_VERSION = "4.0.0";
     String IMPL_VERSION = "$IMPL_VERSION";
 
     /**