diff --git a/libsignal-service/protobuf/SignalService.proto b/libsignal-service/protobuf/SignalService.proto
index 37506c78a..96c581b97 100644
--- a/libsignal-service/protobuf/SignalService.proto
+++ b/libsignal-service/protobuf/SignalService.proto
@@ -331,6 +331,7 @@ message DataMessage {
   optional GroupContextV2     groupV2                 = 15;
   optional uint32             flags                   = 4;
   optional uint32             expireTimer             = 5;
+  optional uint32             expireTimerVersion      = 23;
   optional bytes              profileKey              = 6;
   optional uint64             timestamp               = 7;
   optional Quote              quote                   = 8;
@@ -792,17 +793,18 @@ message ContactDetails {
     optional uint32 length      = 2;
   }
 
-  optional string   number        = 1;
-  optional string   aci           = 9;
-  optional string   name          = 2;
-  optional Avatar   avatar        = 3;
-  optional string   color         = 4;
-  optional Verified verified      = 5;
-  optional bytes    profileKey    = 6;
-  reserved          /*blocked*/     7;
-  optional uint32   expireTimer   = 8;
-  optional uint32   inboxPosition = 10;
-  optional bool     archived      = 11;
+  optional string   number             = 1;
+  optional string   aci                = 9;
+  optional string   name               = 2;
+  optional Avatar   avatar             = 3;
+  optional string   color              = 4;
+  optional Verified verified           = 5;
+  optional bytes    profileKey         = 6;
+  reserved          /*blocked*/          7;
+  optional uint32   expireTimer        = 8;
+  optional uint32   expireTimerVersion = 12;
+  optional uint32   inboxPosition      = 10;
+  optional bool     archived           = 11;
 }
 
 message GroupDetails {
@@ -854,4 +856,4 @@ message PniSignatureMessage {
 message EditMessage {
   optional uint64      targetSentTimestamp = 1;
   optional DataMessage dataMessage         = 2;
-}
\ No newline at end of file
+}
diff --git a/libsignal-service/src/models.rs b/libsignal-service/src/models.rs
index a780dc0f9..08698bebe 100644
--- a/libsignal-service/src/models.rs
+++ b/libsignal-service/src/models.rs
@@ -29,6 +29,7 @@ pub struct Contact {
     pub verified: Verified,
     pub profile_key: Vec<u8>,
     pub expire_timer: u32,
+    pub expire_timer_version: u32,
     pub inbox_position: u32,
     pub archived: bool,
     #[serde(skip)]
@@ -69,6 +70,7 @@ impl Contact {
             verified: contact_details.verified.clone().unwrap_or_default(),
             profile_key: contact_details.profile_key().to_vec(),
             expire_timer: contact_details.expire_timer(),
+            expire_timer_version: contact_details.expire_timer_version(),
             inbox_position: contact_details.inbox_position(),
             archived: contact_details.archived(),
             avatar: contact_details.avatar.and_then(|avatar| {
diff --git a/libsignal-service/src/push_service.rs b/libsignal-service/src/push_service.rs
index 339439514..7bdec5912 100644
--- a/libsignal-service/src/push_service.rs
+++ b/libsignal-service/src/push_service.rs
@@ -435,12 +435,16 @@ pub struct LinkAccountAttributes {
 #[serde(rename_all = "camelCase")]
 pub struct LinkCapabilities {
     pub delete_sync: bool,
+    pub versioned_expiration_timer: bool,
 }
 
 // https://github.com/signalapp/Signal-Desktop/blob/1e57db6aa4786dcddc944349e4894333ac2ffc9e/ts/textsecure/WebAPI.ts#L1287
 impl Default for LinkCapabilities {
     fn default() -> Self {
-        Self { delete_sync: true }
+        Self {
+            delete_sync: true,
+            versioned_expiration_timer: true,
+        }
     }
 }