diff --git a/lib/telegram_helper.rb b/lib/telegram_helper.rb
index db18701362fe..c720179beaee 100644
--- a/lib/telegram_helper.rb
+++ b/lib/telegram_helper.rb
@@ -707,6 +707,9 @@ def to_group(params, group_id, channel)
       params.delete(:edited_channel_post) # discard unused :edited_channel_post hash
     end
 
+    # Other update types (e.g. my_chat_member when a user blocks the bot) carry nothing to import.
+    return if !params[:message] && !params[:edited_message]
+
     # prevent multiple update
     return if !params[:edited_message] && Ticket::Article.exists?(message_id: TelegramHelper.message_id(params))
 
diff --git a/spec/requests/integration/telegram_spec.rb b/spec/requests/integration/telegram_spec.rb
index 670fca9c1e86..8fbf7fbef2f2 100644
--- a/spec/requests/integration/telegram_spec.rb
+++ b/spec/requests/integration/telegram_spec.rb
@@ -154,6 +154,12 @@
           expect(response).to have_http_status(:ok)
         end
 
+        it 'ignores update without message (e.g. bot blocked by user)' do
+          expect { post callback_url, params: read_message('private', 'my_chat_member'), as: :json }
+            .not_to change(Ticket::Article, :count)
+          expect(response).to have_http_status(:ok)
+        end
+
         it 'text message' do
           post callback_url, params: read_message('private', 'text'), as: :json
           expect(response).to have_http_status(:ok)
diff --git a/test/data/telegram/private/my_chat_member.json b/test/data/telegram/private/my_chat_member.json
new file mode 100644
index 000000000000..26a4a70bfdd9
--- /dev/null
+++ b/test/data/telegram/private/my_chat_member.json
@@ -0,0 +1,39 @@
+{
+  "update_id":2,
+  "my_chat_member":{
+    "chat": {
+      "id":111111,
+      "first_name":"Test Firstname",
+      "last_name":"Test Lastname",
+      "username":"Testusername",
+      "type":"private"
+    },
+    "from": {
+      "id":111111,
+      "is_bot":false,
+      "first_name":"Test Firstname",
+      "last_name":"Test Lastname",
+      "username":"Testusername"
+    },
+    "date":1441645600,
+    "old_chat_member": {
+      "user": {
+        "id":222222,
+        "is_bot":true,
+        "first_name":"Chrispresso Customer Service",
+        "username":"ChrispressoBot"
+      },
+      "status":"member"
+    },
+    "new_chat_member": {
+      "user": {
+        "id":222222,
+        "is_bot":true,
+        "first_name":"Chrispresso Customer Service",
+        "username":"ChrispressoBot"
+      },
+      "status":"kicked",
+      "until_date":0
+    }
+  }
+}