diff --git a/crates/ruma-client-api/src/error.rs b/crates/ruma-client-api/src/error.rs
index d7981df8..54238ad2 100644
--- a/crates/ruma-client-api/src/error.rs
+++ b/crates/ruma-client-api/src/error.rs
@@ -136,6 +136,9 @@ pub enum ErrorKind {
     /// M_CANNOT_LEAVE_SERVER_NOTICE_ROOM
     CannotLeaveServerNoticeRoom,
 
+    /// M_WEAK_PASSWORD
+    WeakPassword,
+
     #[doc(hidden)]
     _Custom { errcode: PrivOwnedStr, extra: Extra },
 }
@@ -179,6 +182,7 @@ impl AsRef<str> for ErrorKind {
             Self::Exclusive => "M_EXCLUSIVE",
             Self::ResourceLimitExceeded { .. } => "M_RESOURCE_LIMIT_EXCEEDED",
             Self::CannotLeaveServerNoticeRoom => "M_CANNOT_LEAVE_SERVER_NOTICE_ROOM",
+            Self::WeakPassword => "M_WEAK_PASSWORD",
             Self::_Custom { errcode, .. } => &errcode.0,
         }
     }
diff --git a/crates/ruma-client-api/src/error/kind_serde.rs b/crates/ruma-client-api/src/error/kind_serde.rs
index e4eb1e08..6760125a 100644
--- a/crates/ruma-client-api/src/error/kind_serde.rs
+++ b/crates/ruma-client-api/src/error/kind_serde.rs
@@ -206,6 +206,7 @@ impl<'de> Visitor<'de> for ErrorKindVisitor {
                 .map_err(de::Error::custom)?,
             },
             ErrCode::CannotLeaveServerNoticeRoom => ErrorKind::CannotLeaveServerNoticeRoom,
+            ErrCode::WeakPassword => ErrorKind::WeakPassword,
             ErrCode::_Custom(errcode) => ErrorKind::_Custom { errcode, extra },
         })
     }
@@ -246,6 +247,7 @@ enum ErrCode {
     Exclusive,
     ResourceLimitExceeded,
     CannotLeaveServerNoticeRoom,
+    WeakPassword,
     _Custom(PrivOwnedStr),
 }