diff --git a/__tests__/hostApi/statementStore.spec.ts b/__tests__/hostApi/statementStore.spec.ts
index 518c653a..ea65f44a 100644
--- a/__tests__/hostApi/statementStore.spec.ts
+++ b/__tests__/hostApi/statementStore.spec.ts
@@ -39,7 +39,7 @@ function createMockSignedStatement(topicSeed: number): SignedStatement {
       signer: new Uint8Array(32).fill(2),
     }),
     decryptionKey: undefined,
-    expiry: undefined,
+    expiry: BigInt(Math.floor(Date.now() / 1000) + 7 * 24 * 60 * 60) << 32n,
     channel: undefined,
     topics: [createTopic(topicSeed)],
     data: new Uint8Array([1, 2, 3]),
@@ -51,7 +51,7 @@ function createMockStatement(topicSeed: number): Statement {
   return {
     proof: undefined,
     decryptionKey: undefined,
-    expiry: undefined,
+    expiry: BigInt(Math.floor(Date.now() / 1000) + 7 * 24 * 60 * 60) << 32n,
     channel: undefined,
     topics: [createTopic(topicSeed)],
     data: new Uint8Array([1, 2, 3]),
diff --git a/docs/design/host-api-protocol.md b/docs/design/host-api-protocol.md
index 1e710ae6..14096efa 100644
--- a/docs/design/host-api-protocol.md
+++ b/docs/design/host-api-protocol.md
@@ -1080,7 +1080,7 @@ enum StatementProof {
 struct Statement {
   proof: Option<StatementProof>,
   decryption_key: Option<DecryptionKey>,
-  priority: Option<u32>,
+  expiry: u64,
   channel: Option<Channel>,
   topics: Vec<Topic>,
   data: Option<Vec<u8>>
@@ -1089,7 +1089,7 @@ struct Statement {
 struct SignedStatement {
   proof: StatementProof,
   decryption_key: Option<DecryptionKey>,
-  priority: Option<u32>,
+  expiry: u64,
   channel: Option<Channel>,
   topics: Vec<Topic>,
   data: Option<Vec<u8>>
diff --git a/packages/host-api/src/protocol/v1/statementStore.ts b/packages/host-api/src/protocol/v1/statementStore.ts
index 26be921f..fcbe5f4d 100644
--- a/packages/host-api/src/protocol/v1/statementStore.ts
+++ b/packages/host-api/src/protocol/v1/statementStore.ts
@@ -43,7 +43,7 @@ const StatementProof = Enum({
 export const Statement = Struct({
   proof: Option(StatementProof),
   decryptionKey: Option(DecryptionKey),
-  expiry: Option(u64),
+  expiry: u64,
   channel: Option(Channel),
   topics: Vector(Topic),
   data: Option(Bytes()),
@@ -52,7 +52,7 @@ export const Statement = Struct({
 export const SignedStatement = Struct({
   proof: StatementProof,
   decryptionKey: Option(DecryptionKey),
-  expiry: Option(u64),
+  expiry: u64,
   channel: Option(Channel),
   topics: Vector(Topic),
   data: Option(Bytes()),