diff --git a/src/main/java/moe/yushi/authlibinjector/AuthlibInjector.java b/src/main/java/moe/yushi/authlibinjector/AuthlibInjector.java
index 76024ce..e54e87f 100644
--- a/src/main/java/moe/yushi/authlibinjector/AuthlibInjector.java
+++ b/src/main/java/moe/yushi/authlibinjector/AuthlibInjector.java
@@ -65,6 +65,7 @@ import moe.yushi.authlibinjector.transform.support.PaperUsernameCheckTransformer
 import moe.yushi.authlibinjector.transform.support.ProxyParameterWorkaround;
 import moe.yushi.authlibinjector.transform.support.SkinWhitelistTransformUnit;
 import moe.yushi.authlibinjector.transform.support.UsernameCharacterCheckTransformer;
+import moe.yushi.authlibinjector.transform.support.VelocityIdentifiedKeyImplTransformUnit;
 import moe.yushi.authlibinjector.transform.support.YggdrasilKeyTransformUnit;
 import moe.yushi.authlibinjector.yggdrasil.CustomYggdrasilAPIProvider;
 import moe.yushi.authlibinjector.yggdrasil.MojangYggdrasilAPIProvider;
@@ -291,6 +292,7 @@ public final class AuthlibInjector {
 
 		transformer.units.add(new YggdrasilKeyTransformUnit());
 		config.getDecodedPublickey().ifPresent(YggdrasilKeyTransformUnit.PUBLIC_KEYS::add);
+		transformer.units.add(new VelocityIdentifiedKeyImplTransformUnit());
 
 		return transformer;
 	}
diff --git a/src/main/java/moe/yushi/authlibinjector/transform/support/VelocityProfileKeyTransformUnit.java b/src/main/java/moe/yushi/authlibinjector/transform/support/VelocityProfileKeyTransformUnit.java
new file mode 100644
index 0000000..ee4dff8
--- /dev/null
+++ b/src/main/java/moe/yushi/authlibinjector/transform/support/VelocityProfileKeyTransformUnit.java
@@ -0,0 +1,65 @@
+/*
+ * Copyright (C) 2022  Haowei Wen <yushijinhun@gmail.com> and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package moe.yushi.authlibinjector.transform.support;
+
+import static org.objectweb.asm.Opcodes.ARETURN;
+import static org.objectweb.asm.Opcodes.ASM9;
+import static org.objectweb.asm.Opcodes.GETSTATIC;
+import java.util.Optional;
+import org.objectweb.asm.ClassVisitor;
+import org.objectweb.asm.MethodVisitor;
+import moe.yushi.authlibinjector.transform.TransformContext;
+import moe.yushi.authlibinjector.transform.TransformUnit;
+
+/**
+ * Hacks Velocity to bypass profile key signature validation.
+ * See https://github.com/PaperMC/Velocity/commit/1a3fba4250553702d9dcd05731d04347bfc24c9f .
+ */
+public class VelocityProfileKeyTransformUnit implements TransformUnit {
+
+	@Override
+	public Optional<ClassVisitor> transform(ClassLoader classLoader, String className, ClassVisitor writer, TransformContext ctx) {
+		if ("com.velocitypowered.proxy.crypto.IdentifiedKeyImpl".equals(className)) {
+			return Optional.of(new ClassVisitor(ASM9, writer) {
+				@Override
+				public MethodVisitor visitMethod(int access, String name, String descriptor, String signature, String[] exceptions) {
+					if ("validateData".equals(name) && "(Ljava/util/UUID;)Ljava/lang/Boolean;".equals(descriptor)) {
+						ctx.markModified();
+
+						MethodVisitor mv = super.visitMethod(access, name, descriptor, signature, exceptions);
+						mv.visitCode();
+						mv.visitFieldInsn(GETSTATIC, "java/lang/Boolean", "TRUE", "Ljava/lang/Boolean;");
+						mv.visitInsn(ARETURN);
+						mv.visitMaxs(-1, -1);
+						mv.visitEnd();
+
+						return null;
+					} else {
+						return super.visitMethod(access, name, descriptor, signature, exceptions);
+					}
+				}
+			});
+		} else {
+			return Optional.empty();
+		}
+	}
+
+	@Override
+	public String toString() {
+		return "Velocity Profile Key Transformer";
+	}
+}