diff --git a/service/src/main/java/org/whispersystems/textsecuregcm/entities/AccountIdentityResponse.java b/service/src/main/java/org/whispersystems/textsecuregcm/entities/AccountIdentityResponse.java
index 450ea51a6..a5f44596b 100644
--- a/service/src/main/java/org/whispersystems/textsecuregcm/entities/AccountIdentityResponse.java
+++ b/service/src/main/java/org/whispersystems/textsecuregcm/entities/AccountIdentityResponse.java
@@ -5,12 +5,17 @@
 
 package org.whispersystems.textsecuregcm.entities;
 
+import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
+import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import org.whispersystems.textsecuregcm.util.ByteArrayBase64UrlAdapter;
 import java.util.UUID;
 import javax.annotation.Nullable;
 
 public record AccountIdentityResponse(UUID uuid,
                                       String number,
                                       UUID pni,
+                                      @JsonSerialize(using = ByteArrayBase64UrlAdapter.Serializing.class)
+                                      @JsonDeserialize(using = ByteArrayBase64UrlAdapter.Deserializing.class)
                                       @Nullable byte[] usernameHash,
                                       boolean storageCapable) {
 }