diff --git a/concordium-grpc-api b/concordium-grpc-api
index 30ebd6231..7d7e61af3 160000
--- a/concordium-grpc-api
+++ b/concordium-grpc-api
@@ -1 +1 @@
-Subproject commit 30ebd62312470f7dbb93309a4fc58e9082d0fedc
+Subproject commit 7d7e61af30df406de28955364e3ced2a86950d86
diff --git a/rust-src/concordium_base/CHANGELOG.md b/rust-src/concordium_base/CHANGELOG.md
index ccd391dee..d7f9a5ab7 100644
--- a/rust-src/concordium_base/CHANGELOG.md
+++ b/rust-src/concordium_base/CHANGELOG.md
@@ -3,6 +3,7 @@
 - Add constructor `TokenAddress::new` for CIS2 type `TokenAddress`.
 - Introduce new chain parameters `ValidatorScoreParameters` that contain the
   threshold of maximal missed rounds before a validator gets suspended.
+- Add `Default` instance for `UpdateSequenceNumber`.
 
 ## 6.0.0
 
diff --git a/rust-src/concordium_base/src/base.rs b/rust-src/concordium_base/src/base.rs
index 72ccf98d9..b1a83325c 100644
--- a/rust-src/concordium_base/src/base.rs
+++ b/rust-src/concordium_base/src/base.rs
@@ -350,7 +350,7 @@ impl Nonce {
 #[serde(transparent)]
 #[derive(Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Debug, FromStr, Display, From, Into)]
 /// Equivalent of a transaction nonce but for update instructions. Update
-/// sequence numbers are per update type.
+/// sequence numbers are per update type. The minimum sequence number is 1.
 pub struct UpdateSequenceNumber {
     pub number: u64,
 }
@@ -369,6 +369,10 @@ impl UpdateSequenceNumber {
     pub fn next_mut(&mut self) { self.number += 1; }
 }
 
+impl Default for UpdateSequenceNumber {
+    fn default() -> Self { Self { number: 1 } }
+}
+
 #[repr(transparent)]
 #[derive(SerdeSerialize, SerdeDeserialize, Serialize)]
 #[serde(transparent)]