diff --git a/jirs-data/src/lib.rs b/jirs-data/src/lib.rs
index 87fbd5b9..f2946887 100644
--- a/jirs-data/src/lib.rs
+++ b/jirs-data/src/lib.rs
@@ -689,8 +689,10 @@ pub enum WsMsg {
     // invitations
     InvitationListRequest,
     InvitationListLoaded(Vec<Invitation>),
+    //
     InvitedUsersRequest,
     InvitedUsersLoaded(Vec<User>),
+    //
     InvitationSendRequest {
         name: UsernameString,
         email: EmailString,
diff --git a/jirs-server/src/db/invitations.rs b/jirs-server/src/db/invitations.rs
index 7f3b3e15..27a68351 100644
--- a/jirs-server/src/db/invitations.rs
+++ b/jirs-server/src/db/invitations.rs
@@ -3,12 +3,12 @@ use diesel::pg::Pg;
 use diesel::prelude::*;
 
 use jirs_data::{
-    EmailString, Invitation, InvitationId, InvitationState, ProjectId, UserId, UsernameString,
+    EmailString, Invitation, InvitationId, InvitationState, ProjectId, User, UserId, UsernameString,
 };
 
 use crate::db::DbExecutor;
 use crate::errors::ServiceErrors;
-use crate::models::InvitationForm;
+use crate::models::{InvitationForm, UserForm};
 
 pub struct ListInvitation {
     pub user_id: UserId,
@@ -129,3 +129,53 @@ impl Handler<RevokeInvitation> for DbExecutor {
         Ok(())
     }
 }
+
+pub struct AcceptInvitation {
+    pub id: InvitationId,
+}
+
+impl Message for AcceptInvitation {
+    type Result = Result<User, ServiceErrors>;
+}
+
+impl Handler<AcceptInvitation> for DbExecutor {
+    type Result = Result<User, ServiceErrors>;
+
+    fn handle(&mut self, msg: AcceptInvitation, _ctx: &mut Self::Context) -> Self::Result {
+        use crate::schema::invitations::dsl::*;
+        use crate::schema::users::dsl::users;
+
+        let conn = &self
+            .pool
+            .get()
+            .map_err(|_| ServiceErrors::DatabaseConnectionLost)?;
+
+        let query = invitations.find(msg.id);
+        debug!("{}", diesel::debug_query::<Pg, _>(&query).to_string());
+        let invitation: Invitation = query
+            .first(conn)
+            .map_err(|_| ServiceErrors::DatabaseConnectionLost)?;
+
+        let query = diesel::update(invitations)
+            .set(state.eq(InvitationState::Accepted))
+            .filter(id.eq(invitation.id));
+        debug!("{}", diesel::debug_query::<Pg, _>(&query).to_string());
+        query
+            .execute(conn)
+            .map_err(|_| ServiceErrors::DatabaseConnectionLost)?;
+
+        let form = UserForm {
+            name: invitation.name,
+            email: invitation.email,
+            avatar_url: None,
+            project_id: invitation.project_id,
+        };
+        let query = diesel::insert_into(users).values(form);
+        debug!("{}", diesel::debug_query::<Pg, _>(&query).to_string());
+        let user: User = query
+            .get_result(conn)
+            .map_err(|_| ServiceErrors::DatabaseConnectionLost)?;
+
+        Ok(user)
+    }
+}
diff --git a/jirs-server/src/ws/invitations.rs b/jirs-server/src/ws/invitations.rs
index 38947c61..94bfb201 100644
--- a/jirs-server/src/ws/invitations.rs
+++ b/jirs-server/src/ws/invitations.rs
@@ -102,3 +102,25 @@ impl Handler<RevokeInvitation> for WebSocketActor {
         Ok(res)
     }
 }
+
+pub struct AcceptInvitation {
+    pub id: InvitationId,
+}
+
+impl Message for AcceptInvitation {
+    type Result = WsResult;
+}
+
+impl Handler<AcceptInvitation> for WebSocketActor {
+    type Result = WsResult;
+
+    fn handle(&mut self, msg: AcceptInvitation, _ctx: &mut Self::Context) -> Self::Result {
+        self.require_user()?;
+        let AcceptInvitation { id } = msg;
+        let res = match block_on(self.db.send(invitations::AcceptInvitation { id })) {
+            Ok(Ok(_)) => Some(WsMsg::InvitationAcceptSuccess(id)),
+            _ => None,
+        };
+        Ok(res)
+    }
+}
diff --git a/jirs-server/src/ws/mod.rs b/jirs-server/src/ws/mod.rs
index bb2c2ad7..f053721b 100644
--- a/jirs-server/src/ws/mod.rs
+++ b/jirs-server/src/ws/mod.rs
@@ -266,6 +266,38 @@ impl StreamHandler<Result<ws::Message, ws::ProtocolError>> for WebSocketActor {
     }
 }
 
+trait MessageHandler {
+    fn try_message<M>(&self) -> Option<M>
+    where
+        M: Message<Result = WsResult>;
+}
+
+impl WebSocketActor {
+    fn try_handle_message(
+        &mut self,
+        msg: WsMsg,
+        ctx: <WebSocketActor as Actor>::Context,
+    ) -> WsResult {
+        use invitations::*;
+
+        Ok(None)
+        // match msg {
+        //     WsMsg::InvitationSendRequest { name, email } => self.handle(
+        //         CreateInvitation {
+        //             name: name.clone(),
+        //             email: email.clone(),
+        //         },
+        //         ctx,
+        //     ),
+        //     WsMsg::InvitationListRequest => self.handle(ListInvitation, ctx),
+        //     WsMsg::InvitationAcceptRequest(id) => Ok(None),
+        //     WsMsg::InvitationRevokeRequest(id) => self.handle(RevokeInvitation { id: *id }, ctx),
+        //     WsMsg::InvitedUsersRequest => Ok(None),
+        //     _ => Ok(None),
+        // }
+    }
+}
+
 #[derive(Message, Debug)]
 #[rtype(result = "()")]
 pub enum InnerMsg {