diff --git a/src/main/java/ru/ulstu/conference/model/Conference.java b/src/main/java/ru/ulstu/conference/model/Conference.java
index 0c3972d..09220c0 100644
--- a/src/main/java/ru/ulstu/conference/model/Conference.java
+++ b/src/main/java/ru/ulstu/conference/model/Conference.java
@@ -8,6 +8,7 @@ import ru.ulstu.core.model.BaseEntity;
 import ru.ulstu.core.model.UserActivity;
 import ru.ulstu.deadline.model.Deadline;
 import ru.ulstu.paper.model.Paper;
+import ru.ulstu.ping.model.Ping;
 import ru.ulstu.user.model.User;
 
 import javax.persistence.CascadeType;
@@ -71,6 +72,11 @@ public class Conference extends BaseEntity implements UserActivity {
     @Fetch(FetchMode.SUBSELECT)
     private List<ConferenceUser> users = new ArrayList<>();
 
+    @OneToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER)
+    @JoinColumn(name = "conference_id")
+    @Fetch(FetchMode.SUBSELECT)
+    private List<Ping> pings;
+
     public String getTitle() {
         return title;
     }
@@ -156,4 +162,13 @@ public class Conference extends BaseEntity implements UserActivity {
     public Set<User> getActivityUsers() {
         return getUsers().stream().map(ConferenceUser::getUser).collect(Collectors.toSet());
     }
+
+    public void addPing(Ping ping) {
+        this.pings.add(ping);
+    }
+
+    @Override
+    public List<Ping> getPings() {
+        return this.pings;
+    }
 }
diff --git a/src/main/java/ru/ulstu/core/model/UserActivity.java b/src/main/java/ru/ulstu/core/model/UserActivity.java
index 8e4e270..051a5c9 100644
--- a/src/main/java/ru/ulstu/core/model/UserActivity.java
+++ b/src/main/java/ru/ulstu/core/model/UserActivity.java
@@ -1,10 +1,14 @@
 package ru.ulstu.core.model;
 
+import ru.ulstu.ping.model.Ping;
 import ru.ulstu.user.model.User;
 
+import java.util.List;
 import java.util.Set;
 
 public interface UserActivity {
     String getTitle();
     Set<User> getActivityUsers();
+    void addPing(Ping ping);
+    List<Ping> getPings();
 }
diff --git a/src/main/java/ru/ulstu/grant/model/Grant.java b/src/main/java/ru/ulstu/grant/model/Grant.java
index a653772..c10ad11 100644
--- a/src/main/java/ru/ulstu/grant/model/Grant.java
+++ b/src/main/java/ru/ulstu/grant/model/Grant.java
@@ -8,6 +8,7 @@ import ru.ulstu.core.model.UserActivity;
 import ru.ulstu.deadline.model.Deadline;
 import ru.ulstu.file.model.FileData;
 import ru.ulstu.paper.model.Paper;
+import ru.ulstu.ping.model.Ping;
 import ru.ulstu.project.model.Project;
 import ru.ulstu.timeline.model.Event;
 import ru.ulstu.user.model.User;
@@ -98,6 +99,11 @@ public class Grant extends BaseEntity implements UserActivity {
     @JoinColumn(name = "grant_id")
     private List<Event> events = new ArrayList<>();
 
+    @OneToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER)
+    @JoinColumn(name = "grant_id")
+    @Fetch(FetchMode.SUBSELECT)
+    private List<Ping> pings;
+
     public GrantStatus getStatus() {
         return status;
     }
@@ -191,4 +197,13 @@ public class Grant extends BaseEntity implements UserActivity {
                 .filter(d -> d.getDate().after(new Date()))
                 .findFirst();
     }
+
+    public void addPing(Ping ping) {
+        this.pings.add(ping);
+    }
+
+    @Override
+    public List<Ping> getPings() {
+        return this.pings;
+    }
 }
diff --git a/src/main/java/ru/ulstu/grant/service/GrantService.java b/src/main/java/ru/ulstu/grant/service/GrantService.java
index 1770334..84e363f 100644
--- a/src/main/java/ru/ulstu/grant/service/GrantService.java
+++ b/src/main/java/ru/ulstu/grant/service/GrantService.java
@@ -17,6 +17,7 @@ import ru.ulstu.name.BaseService;
 import ru.ulstu.paper.model.Paper;
 import ru.ulstu.paper.model.PaperDto;
 import ru.ulstu.paper.service.PaperService;
+import ru.ulstu.ping.model.Ping;
 import ru.ulstu.ping.service.PingService;
 import ru.ulstu.project.model.Project;
 import ru.ulstu.project.model.ProjectDto;
@@ -347,6 +348,8 @@ public class GrantService extends BaseService {
 
     @Transactional
     public void ping(int grantId) throws IOException {
-        pingService.addPing(findById(grantId));
+        Grant grant = findById(grantId);
+        grant.addPing(new Ping(new Date(), userService.getCurrentUser()));
+        grantRepository.save(grant);
     }
 }
diff --git a/src/main/java/ru/ulstu/paper/model/Paper.java b/src/main/java/ru/ulstu/paper/model/Paper.java
index 5d951a5..e183877 100644
--- a/src/main/java/ru/ulstu/paper/model/Paper.java
+++ b/src/main/java/ru/ulstu/paper/model/Paper.java
@@ -9,6 +9,7 @@ import ru.ulstu.core.model.UserActivity;
 import ru.ulstu.deadline.model.Deadline;
 import ru.ulstu.file.model.FileData;
 import ru.ulstu.grant.model.Grant;
+import ru.ulstu.ping.model.Ping;
 import ru.ulstu.timeline.model.Event;
 import ru.ulstu.user.model.User;
 
@@ -128,6 +129,11 @@ public class Paper extends BaseEntity implements UserActivity {
     @Fetch(FetchMode.SUBSELECT)
     private List<Reference> references = new ArrayList<>();
 
+    @OneToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER)
+    @JoinColumn(name = "paper_id")
+    @Fetch(FetchMode.SUBSELECT)
+    private List<Ping> pings;
+
     public PaperStatus getStatus() {
         return status;
     }
@@ -310,4 +316,13 @@ public class Paper extends BaseEntity implements UserActivity {
     public int hashCode() {
         return Objects.hash(super.hashCode(), title, status, type, createDate, updateDate, deadlines, comment, url, locked, events, files, authors, latexText, conferences, grants);
     }
+
+    public void addPing(Ping ping) {
+        this.pings.add(ping);
+    }
+
+    @Override
+    public List<Ping> getPings() {
+        return this.pings;
+    }
 }
diff --git a/src/main/java/ru/ulstu/paper/service/PaperService.java b/src/main/java/ru/ulstu/paper/service/PaperService.java
index 3be9aee..0e159d5 100644
--- a/src/main/java/ru/ulstu/paper/service/PaperService.java
+++ b/src/main/java/ru/ulstu/paper/service/PaperService.java
@@ -15,6 +15,7 @@ import ru.ulstu.paper.model.Reference;
 import ru.ulstu.paper.model.ReferenceDto;
 import ru.ulstu.paper.repository.PaperRepository;
 import ru.ulstu.paper.repository.ReferenceRepository;
+import ru.ulstu.ping.model.Ping;
 import ru.ulstu.ping.service.PingService;
 import ru.ulstu.timeline.service.EventService;
 import ru.ulstu.user.model.User;
@@ -393,6 +394,8 @@ public class PaperService {
 
     @Transactional
     public void ping(int paperId) throws IOException {
-        pingService.addPing(findPaperById(paperId));
+        Paper paper = findPaperById(paperId);
+        paper.addPing(new Ping(new Date(), userService.getCurrentUser()));
+        paperRepository.save(paper);
     }
 }
diff --git a/src/main/java/ru/ulstu/ping/service/PingScheduler.java b/src/main/java/ru/ulstu/ping/service/PingScheduler.java
index a60e061..239abbf 100644
--- a/src/main/java/ru/ulstu/ping/service/PingScheduler.java
+++ b/src/main/java/ru/ulstu/ping/service/PingScheduler.java
@@ -54,6 +54,5 @@ public class PingScheduler {
             mailService.sendEmailFromTemplate(ImmutableMap.of("pings", pingInfo.getPings()),
                     pingInfo.getUser(),  "pingsInfoWeekEmail", PING_MAIL_SUBJECT);
         }
-
     }
 }
diff --git a/src/main/java/ru/ulstu/project/model/Project.java b/src/main/java/ru/ulstu/project/model/Project.java
index 227856e..84324dd 100644
--- a/src/main/java/ru/ulstu/project/model/Project.java
+++ b/src/main/java/ru/ulstu/project/model/Project.java
@@ -1,11 +1,14 @@
 package ru.ulstu.project.model;
 
+import org.hibernate.annotations.Fetch;
+import org.hibernate.annotations.FetchMode;
 import org.hibernate.validator.constraints.NotBlank;
 import ru.ulstu.core.model.BaseEntity;
 import ru.ulstu.core.model.UserActivity;
 import ru.ulstu.deadline.model.Deadline;
 import ru.ulstu.file.model.FileData;
 import ru.ulstu.grant.model.Grant;
+import ru.ulstu.ping.model.Ping;
 import ru.ulstu.user.model.User;
 
 import javax.persistence.CascadeType;
@@ -76,6 +79,11 @@ public class Project extends BaseEntity implements UserActivity {
     @ManyToMany(fetch = FetchType.LAZY)
     private List<User> executors = new ArrayList<>();
 
+    @OneToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER)
+    @JoinColumn(name = "project_id")
+    @Fetch(FetchMode.SUBSELECT)
+    private List<Ping> pings = new ArrayList<>();
+
     public String getTitle() {
         return title;
     }
@@ -140,9 +148,16 @@ public class Project extends BaseEntity implements UserActivity {
         this.executors = executors;
     }
 
-    @Override
     public Set<User> getUsers() {
-        Set<User> users = new HashSet<User>(getExecutors());
-        return users;
+        return new HashSet<User>(getExecutors());
+    }
+
+    public void addPing(Ping ping) {
+        this.pings.add(new Ping());
+    }
+
+    @Override
+    public List<Ping> getPings() {
+        return this.pings;
     }
 }
diff --git a/src/main/java/ru/ulstu/project/service/ProjectService.java b/src/main/java/ru/ulstu/project/service/ProjectService.java
index 6c00193..9e1e285 100644
--- a/src/main/java/ru/ulstu/project/service/ProjectService.java
+++ b/src/main/java/ru/ulstu/project/service/ProjectService.java
@@ -6,6 +6,7 @@ import org.thymeleaf.util.StringUtils;
 import ru.ulstu.deadline.service.DeadlineService;
 import ru.ulstu.file.service.FileService;
 import ru.ulstu.grant.repository.GrantRepository;
+import ru.ulstu.ping.model.Ping;
 import ru.ulstu.ping.service.PingService;
 import ru.ulstu.project.model.Project;
 import ru.ulstu.project.model.ProjectDto;
@@ -15,6 +16,7 @@ import ru.ulstu.user.service.UserService;
 
 import java.io.IOException;
 import java.util.Arrays;
+import java.util.Date;
 import java.util.List;
 
 import static org.springframework.util.ObjectUtils.isEmpty;
@@ -131,6 +133,8 @@ public class ProjectService {
 
     @Transactional
     public void ping(int projectId) throws IOException {
-        pingService.addPing(findById(projectId));
+        Project project = findById(projectId);
+        project.addPing(new Ping(new Date(), userService.getCurrentUser()));
+        projectRepository.save(project);
     }
 }
diff --git a/src/main/java/ru/ulstu/user/service/UserService.java b/src/main/java/ru/ulstu/user/service/UserService.java
index 62e7ce2..e8cdd4e 100644
--- a/src/main/java/ru/ulstu/user/service/UserService.java
+++ b/src/main/java/ru/ulstu/user/service/UserService.java
@@ -14,6 +14,7 @@ import org.springframework.security.crypto.password.PasswordEncoder;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 import org.springframework.util.StringUtils;
+import ru.ulstu.conference.model.Conference;
 import ru.ulstu.conference.service.ConferenceService;
 import ru.ulstu.configuration.ApplicationProperties;
 import ru.ulstu.core.error.EntityIdIsNullException;
@@ -21,8 +22,11 @@ import ru.ulstu.core.jpa.OffsetablePageRequest;
 import ru.ulstu.core.model.BaseEntity;
 import ru.ulstu.core.model.UserActivity;
 import ru.ulstu.core.model.response.PageableItems;
+import ru.ulstu.grant.service.GrantService;
+import ru.ulstu.paper.service.PaperService;
 import ru.ulstu.ping.model.Ping;
 import ru.ulstu.ping.service.PingService;
+import ru.ulstu.project.service.ProjectService;
 import ru.ulstu.user.error.UserActivationError;
 import ru.ulstu.user.error.UserEmailExistsException;
 import ru.ulstu.user.error.UserIdExistsException;
@@ -78,6 +82,9 @@ public class UserService implements UserDetailsService {
     private final ConferenceService conferenceService;
     private final UserSessionService userSessionService;
     private final PingService pingService;
+    private final PaperService paperService;
+    private final ProjectService projectService;
+    private final GrantService grantService;
 
     public UserService(UserRepository userRepository,
                        PasswordEncoder passwordEncoder,
@@ -87,7 +94,10 @@ public class UserService implements UserDetailsService {
                        ApplicationProperties applicationProperties,
                        @Lazy PingService pingService,
                        @Lazy ConferenceService conferenceRepository,
-                       @Lazy UserSessionService userSessionService) throws ParseException {
+                       @Lazy UserSessionService userSessionService,
+                       @Lazy PaperService paperService,
+                       @Lazy ProjectService projectService,
+                       @Lazy GrantService grantService) throws ParseException {
         this.userRepository = userRepository;
         this.passwordEncoder = passwordEncoder;
         this.userRoleRepository = userRoleRepository;
@@ -98,6 +108,9 @@ public class UserService implements UserDetailsService {
         this.timetableService = new TimetableService();
         this.userSessionService = userSessionService;
         this.pingService = pingService;
+        this.paperService = paperService;
+        this.projectService = projectService;
+        this.grantService = grantService;
     }
 
     private User getUserByEmail(String email) {
@@ -405,9 +418,24 @@ public class UserService implements UserDetailsService {
         }
         Map<String, Integer> activitiesPings = new HashMap<>();
 
-        for (Ping ping : pingService.getPings(activityName)) {
-            UserActivity activity = ping.getActivity();
+        List<? extends UserActivity> activities = new ArrayList<>();
 
+        switch (activityName) {
+            case "conferences":
+                activities = conferenceService.findAll();
+                break;
+            case "papers":
+                activities = paperService.findAll();
+                break;
+            case "projects":
+                activities = projectService.findAll();
+                break;
+            case "grants":
+                activities = grantService.findAll();
+                break;
+        }
+
+        for (UserActivity activity : activities) {
             if (user != null && !activity.getActivityUsers().contains(user)) {
                 continue;
             }
diff --git a/src/main/resources/application.properties b/src/main/resources/application.properties
index f4be778..7e793c0 100644
--- a/src/main/resources/application.properties
+++ b/src/main/resources/application.properties
@@ -24,7 +24,7 @@ spring.mail.properties.mail.smtp.socketFactory.class=javax.net.ssl.SSLSocketFact
 # JPA Settings
 spring.datasource.url=jdbc:postgresql://localhost:5432/ng-tracker
 spring.datasource.username=postgres
-spring.datasource.password=postgres
+spring.datasource.password=password
 spring.datasource.driverclassName=org.postgresql.Driver
 spring.jpa.hibernate.ddl-auto=validate
 # Liquibase Settings
@@ -34,7 +34,7 @@ liquibase.change-log=classpath:db/changelog-master.xml
 # Application Settings
 ng-tracker.base-url=http://127.0.0.1:8080
 ng-tracker.undead-user-login=admin
-ng-tracker.dev-mode=true
+ng-tracker.dev-mode=false
 ng-tracker.debug_email=
 ng-tracker.use-https=false
 ng-tracker.check-run=false
\ No newline at end of file
diff --git a/src/main/resources/db/changelog-20190525_000000-schema.xml b/src/main/resources/db/changelog-20190525_000000-schema.xml
deleted file mode 100644
index 51fffe6..0000000
--- a/src/main/resources/db/changelog-20190525_000000-schema.xml
+++ /dev/null
@@ -1,18 +0,0 @@
-<?xml version="1.1" encoding="UTF-8" standalone="no"?>
-<databaseChangeLog xmlns="http://www.liquibase.org/xml/ns/dbchangelog"
-                   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-                   xsi:schemaLocation="http://www.liquibase.org/xml/ns/dbchangelog http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-3.1.xsd">
-    <changeSet author="arefyev" id="20190525_000000-1">
-        <addColumn tableName="ping">
-            <column name="paper_id" type="integer"/>
-            <column name="grant_id" type="integer"/>
-            <column name="project_id" type="integer"/>
-        </addColumn>
-        <addForeignKeyConstraint baseTableName="ping" baseColumnNames="paper_id" constraintName="paper_fk" referencedTableName="paper"
-                                 referencedColumnNames="id"/>
-        <addForeignKeyConstraint baseTableName="ping" baseColumnNames="grant_id" constraintName="grant_fk" referencedTableName="grants"
-                                 referencedColumnNames="id"/>
-        <addForeignKeyConstraint baseTableName="ping" baseColumnNames="project_id" constraintName="project_fk" referencedTableName="project"
-                                 referencedColumnNames="id"/>
-    </changeSet>
-</databaseChangeLog>
diff --git a/src/main/resources/db/changelog-master.xml b/src/main/resources/db/changelog-master.xml
index 14cb9d7..6285b47 100644
--- a/src/main/resources/db/changelog-master.xml
+++ b/src/main/resources/db/changelog-master.xml
@@ -49,5 +49,5 @@
     <include file="db/changelog-20190523_000000-schema.xml"/>
     <include file="db/changelog-20190528_000000-schema.xml"/>
     <include file="db/changelog-20190528_000002-schema.xml"/>
-    <include file="db/changelog-20190525_000000-schema.xml"/>
+    <include file="db/changelog-20190531_000000-schema.xml"/>
 </databaseChangeLog>
\ No newline at end of file