diff --git a/build.gradle b/build.gradle
index 7af37cd..793a5e9 100644
--- a/build.gradle
+++ b/build.gradle
@@ -80,7 +80,7 @@ dependencies {
     compile "org.springframework.boot:spring-boot-starter-thymeleaf:1.5.10.RELEASE"
 
     // Matrix Java SDK
-    compile 'io.kamax:matrix-java-sdk:0.0.2'
+    compile 'io.kamax:matrix-java-sdk:0.0.8'
 
     // ed25519 handling
     compile 'net.i2p.crypto:eddsa:0.1.0'
diff --git a/src/main/java/io/kamax/mxisd/auth/AuthManager.java b/src/main/java/io/kamax/mxisd/auth/AuthManager.java
index 8239aaf..3ea0ebe 100644
--- a/src/main/java/io/kamax/mxisd/auth/AuthManager.java
+++ b/src/main/java/io/kamax/mxisd/auth/AuthManager.java
@@ -52,7 +52,7 @@ public class AuthManager {
     private InvitationManager invMgr;
 
     public UserAuthResult authenticate(String id, String password) {
-        _MatrixID mxid = new MatrixID(id);
+        _MatrixID mxid = MatrixID.asAcceptable(id);
         for (AuthenticatorProvider provider : providers) {
             if (!provider.isEnabled()) {
                 continue;
@@ -63,9 +63,9 @@ public class AuthManager {
 
                 String mxId;
                 if (UserIdType.Localpart.is(result.getId().getType())) {
-                    mxId = new MatrixID(result.getId().getValue(), mxCfg.getDomain()).getId();
+                    mxId = MatrixID.from(result.getId().getValue(), mxCfg.getDomain()).acceptable().getId();
                 } else if (UserIdType.MatrixID.is(result.getId().getType())) {
-                    mxId = new MatrixID(result.getId().getValue()).getId();
+                    mxId = MatrixID.asAcceptable(result.getId().getValue()).getId();
                 } else {
                     log.warn("Unsupported User ID type {} for backend {}", result.getId().getType(), provider.getClass().getSimpleName());
                     continue;