diff --git a/bot-core/src/main/java/org/sadtech/bot/vcs/core/domain/notify/Notify.java b/bot-core/src/main/java/org/sadtech/bot/vcs/core/domain/notify/Notify.java
index 4ac50eb..179bbca 100644
--- a/bot-core/src/main/java/org/sadtech/bot/vcs/core/domain/notify/Notify.java
+++ b/bot-core/src/main/java/org/sadtech/bot/vcs/core/domain/notify/Notify.java
@@ -1,15 +1,22 @@
 package org.sadtech.bot.vcs.core.domain.notify;
 
 import lombok.Getter;
+import lombok.NonNull;
 import lombok.Setter;
 import org.sadtech.bot.vcs.core.domain.EntityType;
 
 import java.util.Set;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
 
 @Getter
 @Setter
 public abstract class Notify {
 
+    public static final Set<Character> FORBIDDEN_SYMBOLS = Stream.of(
+            '\\', '+', '`', '[', ']', '\"', '~', '*', '#', '=', '-', '_', '>', '<', '!'
+    ).collect(Collectors.toSet());
+
     protected EntityType entityType;
     protected Set<String> recipients;
 
@@ -20,4 +27,16 @@ public abstract class Notify {
 
     public abstract String generateMessage();
 
+    public static String escapeMarkdown(@NonNull String s) {
+        StringBuilder sb = new StringBuilder();
+        for (int i = 0; i < s.length(); i++) {
+            char c = s.charAt(i);
+            if (FORBIDDEN_SYMBOLS.contains(c)) {
+                sb.append('\\');
+            }
+            sb.append(c);
+        }
+        return sb.toString();
+    }
+
 }
diff --git a/bot-core/src/main/java/org/sadtech/bot/vcs/core/domain/notify/SimpleTextNotify.java b/bot-core/src/main/java/org/sadtech/bot/vcs/core/domain/notify/SimpleTextNotify.java
index a226645..9f75980 100644
--- a/bot-core/src/main/java/org/sadtech/bot/vcs/core/domain/notify/SimpleTextNotify.java
+++ b/bot-core/src/main/java/org/sadtech/bot/vcs/core/domain/notify/SimpleTextNotify.java
@@ -24,7 +24,7 @@ public class SimpleTextNotify extends Notify {
 
     @Override
     public String generateMessage() {
-        return message;
+        return escapeMarkdown(message);
     }
 
 }
diff --git a/bot-core/src/main/java/org/sadtech/bot/vcs/core/domain/notify/comment/AnswerCommentNotify.java b/bot-core/src/main/java/org/sadtech/bot/vcs/core/domain/notify/comment/AnswerCommentNotify.java
index 391427c..b8aee09 100644
--- a/bot-core/src/main/java/org/sadtech/bot/vcs/core/domain/notify/comment/AnswerCommentNotify.java
+++ b/bot-core/src/main/java/org/sadtech/bot/vcs/core/domain/notify/comment/AnswerCommentNotify.java
@@ -41,9 +41,13 @@ public class AnswerCommentNotify extends Notify {
                 .collect(Collectors.joining("\n\n"));
         return MessageFormat.format(
                 "{0} *Новые ответы на ваш комментарий* | [ПР]({1}){2}" +
-                        "{3}{4}" +
-                        "{5}",
-                Smile.BELL, url, Smile.HR, youMessage.substring(0, Math.min(youMessage.length(), 180)), Smile.HR, answerText
+                        "{3}{2}" +
+                        "{4}",
+                Smile.BELL,
+                url,
+                Smile.HR,
+                escapeMarkdown(youMessage.substring(0, Math.min(youMessage.length(), 180))),
+                escapeMarkdown(answerText)
         );
     }
 
diff --git a/bot-core/src/main/java/org/sadtech/bot/vcs/core/domain/notify/comment/CommentNotify.java b/bot-core/src/main/java/org/sadtech/bot/vcs/core/domain/notify/comment/CommentNotify.java
index 42aded1..29f2e36 100644
--- a/bot-core/src/main/java/org/sadtech/bot/vcs/core/domain/notify/comment/CommentNotify.java
+++ b/bot-core/src/main/java/org/sadtech/bot/vcs/core/domain/notify/comment/CommentNotify.java
@@ -36,7 +36,7 @@ public class CommentNotify extends Notify {
         return MessageFormat.format(
                 "{0} *Новое упоминание* | [ПР]({1}){2}" +
                         "{3}: {4}",
-                Smile.BELL, url, Smile.HR, authorName, message.replaceAll("@[\\w]+", "")
+                Smile.BELL, url, Smile.HR, authorName, escapeMarkdown(message.replaceAll("@[\\w]+", ""))
         );
     }
 
diff --git a/bot-core/src/main/java/org/sadtech/bot/vcs/core/domain/notify/pullrequest/NewPrNotify.java b/bot-core/src/main/java/org/sadtech/bot/vcs/core/domain/notify/pullrequest/NewPrNotify.java
index 1f40cb3..b2ae276 100644
--- a/bot-core/src/main/java/org/sadtech/bot/vcs/core/domain/notify/pullrequest/NewPrNotify.java
+++ b/bot-core/src/main/java/org/sadtech/bot/vcs/core/domain/notify/pullrequest/NewPrNotify.java
@@ -32,9 +32,9 @@ public class NewPrNotify extends PrNotify {
         return MessageFormat.format(
                 "{0} *Новый Pull Request*{1}" +
                         "[{2}]({3})" +
-                        "{4}{5}{6}: {7}\n\n",
-                Smile.FUN, Smile.HR, title, url, Smile.HR,
-                (description != null && !"".equals(description)) ? description + Smile.HR : "",
+                        "{1}{4}{5}: {6}\n\n",
+                Smile.FUN, Smile.HR, title, url,
+                (description != null && !"".equals(description)) ? escapeMarkdown(description) + Smile.HR : "",
                 Smile.AUTHOR, author
         );
     }
diff --git a/bot-core/src/main/java/org/sadtech/bot/vcs/core/domain/notify/pullrequest/StatusPrNotify.java b/bot-core/src/main/java/org/sadtech/bot/vcs/core/domain/notify/pullrequest/StatusPrNotify.java
index 18fabf0..687bc10 100644
--- a/bot-core/src/main/java/org/sadtech/bot/vcs/core/domain/notify/pullrequest/StatusPrNotify.java
+++ b/bot-core/src/main/java/org/sadtech/bot/vcs/core/domain/notify/pullrequest/StatusPrNotify.java
@@ -32,9 +32,9 @@ public class StatusPrNotify extends PrNotify {
     public String generateMessage() {
         return MessageFormat.format(
                 "{0} *Изменился статус вашего ПР*{1}" +
-                        "[{2}]({3}){4}" +
-                        "{5} -> {6}\n\n",
-                Smile.PEN, Smile.HR, title, url, Smile.HR, oldStatus.name(), newStatus.name()
+                        "[{2}]({3}){1}" +
+                        "{4} -> {5}\n\n",
+                Smile.PEN, Smile.HR, title, url, oldStatus.name(), newStatus.name()
         );
     }
 
diff --git a/bot-core/src/main/java/org/sadtech/bot/vcs/core/domain/notify/task/TaskCloseNotify.java b/bot-core/src/main/java/org/sadtech/bot/vcs/core/domain/notify/task/TaskCloseNotify.java
index ec63528..78d315a 100644
--- a/bot-core/src/main/java/org/sadtech/bot/vcs/core/domain/notify/task/TaskCloseNotify.java
+++ b/bot-core/src/main/java/org/sadtech/bot/vcs/core/domain/notify/task/TaskCloseNotify.java
@@ -28,7 +28,7 @@ public class TaskCloseNotify extends TaskNotify {
         return MessageFormat.format(
                 "{0} *Задача выполнена* | [ПР]({1}){2}" +
                         "{3}: {4}",
-                Smile.TASK, url, Smile.HR, authorName, messageTask
+                Smile.TASK, url, Smile.HR, authorName, escapeMarkdown(messageTask)
         );
     }
 
diff --git a/bot-core/src/main/java/org/sadtech/bot/vcs/core/domain/notify/task/TaskNewNotify.java b/bot-core/src/main/java/org/sadtech/bot/vcs/core/domain/notify/task/TaskNewNotify.java
index e765b68..618c26a 100644
--- a/bot-core/src/main/java/org/sadtech/bot/vcs/core/domain/notify/task/TaskNewNotify.java
+++ b/bot-core/src/main/java/org/sadtech/bot/vcs/core/domain/notify/task/TaskNewNotify.java
@@ -30,7 +30,7 @@ public class TaskNewNotify extends TaskNotify {
         return MessageFormat.format(
                 "{0} *Назначена новая задача* | [ПР]({1}){2}" +
                         "{3}: {4}",
-                Smile.TASK, url, Smile.HR, authorName, messageTask
+                Smile.TASK, url, Smile.HR, authorName, escapeMarkdown(messageTask)
         );
     }
 
diff --git a/bot-core/src/main/java/org/sadtech/bot/vcs/core/service/impl/CommentServiceImpl.java b/bot-core/src/main/java/org/sadtech/bot/vcs/core/service/impl/CommentServiceImpl.java
index 01a00e2..3ec0dcd 100644
--- a/bot-core/src/main/java/org/sadtech/bot/vcs/core/service/impl/CommentServiceImpl.java
+++ b/bot-core/src/main/java/org/sadtech/bot/vcs/core/service/impl/CommentServiceImpl.java
@@ -134,12 +134,12 @@ public class CommentServiceImpl extends AbstractSimpleManagerService<Comment, Lo
         final Set<Long> newAnswerIds = newComment.getAnswers();
         if (!oldAnswerIds.equals(newAnswerIds)) {
             final Set<Long> existsNewAnswersIds = commentRepository.existsById(newAnswerIds);
-            if (!existsNewAnswersIds.isEmpty()) {
-                final List<Comment> newAnswers = commentRepository.findAllById(existsNewAnswersIds).stream()
-                        .filter(comment -> !oldAnswerIds.contains(comment.getId()))
-                        .collect(Collectors.toList());
-                oldComment.getAnswers().clear();
-                oldComment.setAnswers(existsNewAnswersIds);
+            final List<Comment> newAnswers = commentRepository.findAllById(existsNewAnswersIds).stream()
+                    .filter(comment -> !oldAnswerIds.contains(comment.getId()))
+                    .collect(Collectors.toList());
+            oldComment.getAnswers().clear();
+            oldComment.setAnswers(existsNewAnswersIds);
+            if (!newAnswers.isEmpty()) {
                 notifyService.send(
                         AnswerCommentNotify.builder()
                                 .recipients(Collections.singleton(newComment.getAuthor()))
diff --git a/bot-core/src/main/java/org/sadtech/bot/vcs/core/service/impl/TaskServiceImpl.java b/bot-core/src/main/java/org/sadtech/bot/vcs/core/service/impl/TaskServiceImpl.java
index f09a4f5..04d900f 100644
--- a/bot-core/src/main/java/org/sadtech/bot/vcs/core/service/impl/TaskServiceImpl.java
+++ b/bot-core/src/main/java/org/sadtech/bot/vcs/core/service/impl/TaskServiceImpl.java
@@ -126,10 +126,12 @@ public class TaskServiceImpl extends AbstractSimpleManagerService<Task, Long> im
         final Set<Long> newAnswerIds = task.getAnswers();
         if (!oldAnswerIds.equals(newAnswerIds)) {
             final Set<Long> existsNewAnswersIds = commentService.existsById(newAnswerIds);
-            if (!existsNewAnswersIds.isEmpty()) {
-                final List<Comment> newAnswers = commentService.getAllById(existsNewAnswersIds).stream()
-                        .filter(comment -> !oldAnswerIds.contains(comment.getId()))
-                        .collect(Collectors.toList());
+            final List<Comment> newAnswers = commentService.getAllById(existsNewAnswersIds).stream()
+                    .filter(comment -> !oldAnswerIds.contains(comment.getId()))
+                    .collect(Collectors.toList());
+            oldTask.getAnswers().clear();
+            oldTask.setAnswers(existsNewAnswersIds);
+            if (!newAnswers.isEmpty()) {
                 oldTask.getAnswers().clear();
                 oldTask.setAnswers(existsNewAnswersIds);
                 notifyService.send(
diff --git a/teamcity/teamcity-core/src/main/java/org/sadtech/bot/vcs/teamcity/core/domain/TeamcityBuildNotify.java b/teamcity/teamcity-core/src/main/java/org/sadtech/bot/vcs/teamcity/core/domain/TeamcityBuildNotify.java
index b8507f3..926720a 100644
--- a/teamcity/teamcity-core/src/main/java/org/sadtech/bot/vcs/teamcity/core/domain/TeamcityBuildNotify.java
+++ b/teamcity/teamcity-core/src/main/java/org/sadtech/bot/vcs/teamcity/core/domain/TeamcityBuildNotify.java
@@ -36,7 +36,7 @@ public class TeamcityBuildNotify extends Notify {
                 Smile.BUILD,
                 buildShort.getId(),
                 buildShort.getNumber(),
-                buildShort.getProjectId(),
+                escapeMarkdown(buildShort.getProjectId()),
                 Smile.HR,
                 buildShort.getBuildTypeId(),
                 buildShort.getUrl(),