diff --git a/mail/jmap/services/mail/identity.py b/mail/jmap/services/mail/identity.py
index ca9febd44..cb5e31f38 100644
--- a/mail/jmap/services/mail/identity.py
+++ b/mail/jmap/services/mail/identity.py
@@ -7,6 +7,11 @@ class IdentityService(MailService):
 	"""Service for handling identity-related functionality based on the JMAP server capabilities."""
 
 	type: ClassVar[str] = "Identity"
+	capabilities: ClassVar[list[str]] = [
+		"urn:ietf:params:jmap:core",
+		"urn:ietf:params:jmap:mail",
+		"urn:ietf:params:jmap:submission",
+	]
 
 	def create(self, identities: list[dict]) -> dict:
 		"""Public method to create identities, handling batching if the number of identities exceeds the server's maximum allowed in a single 'set' call."""
diff --git a/pyproject.toml b/pyproject.toml
index 9cf1d515c..d82f5c5a9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -12,7 +12,7 @@ dependencies = [
     "wrapt~=1.17.3",
     "bcrypt~=4.2.1",
     "pexpect~=4.9.0",
-    "msgpack~=1.1.2",
+    "msgpack~=1.2.1",
     "isodate~=0.7.2",
     "icalendar~=6.1.0",
     "paramiko~=5.0.0",