diff --git a/src/main/java/ru/serega6531/packmate/model/CtfService.java b/src/main/java/ru/serega6531/packmate/model/CtfService.java
index a20a8f4..737f2fb 100644
--- a/src/main/java/ru/serega6531/packmate/model/CtfService.java
+++ b/src/main/java/ru/serega6531/packmate/model/CtfService.java
@@ -3,6 +3,7 @@ package ru.serega6531.packmate.model;
 import lombok.*;
 import org.hibernate.Hibernate;
 
+import javax.persistence.Column;
 import javax.persistence.Entity;
 import javax.persistence.Id;
 import javax.persistence.Table;
@@ -19,6 +20,7 @@ public class CtfService {
     @Id
     private Integer port;
 
+    @Column(nullable = false)
     private String name;
 
     private boolean decryptTls;
diff --git a/src/main/java/ru/serega6531/packmate/model/Packet.java b/src/main/java/ru/serega6531/packmate/model/Packet.java
index 4095fcf..c35af64 100644
--- a/src/main/java/ru/serega6531/packmate/model/Packet.java
+++ b/src/main/java/ru/serega6531/packmate/model/Packet.java
@@ -55,6 +55,7 @@ public class Packet {
 
     private boolean tlsDecrypted;
 
+    @Column(nullable = false)
     private byte[] content;
 
     @Transient
diff --git a/src/main/java/ru/serega6531/packmate/model/Pattern.java b/src/main/java/ru/serega6531/packmate/model/Pattern.java
index 46bcba1..6d5acad 100644
--- a/src/main/java/ru/serega6531/packmate/model/Pattern.java
+++ b/src/main/java/ru/serega6531/packmate/model/Pattern.java
@@ -11,9 +11,7 @@ import ru.serega6531.packmate.model.enums.PatternActionType;
 import ru.serega6531.packmate.model.enums.PatternDirectionType;
 import ru.serega6531.packmate.model.enums.PatternSearchType;
 
-import javax.persistence.Entity;
-import javax.persistence.GeneratedValue;
-import javax.persistence.Id;
+import javax.persistence.*;
 import java.util.Objects;
 
 @Getter
@@ -38,16 +36,25 @@ public class Pattern {
 
     private boolean enabled;
 
+    @Column(nullable = false)
     private String name;
 
+    @Column(nullable = false)
     private String value;
 
+    @Column(nullable = false)
     private String color;  // для вставки в css
 
+    @Enumerated
+    @Column(nullable = false)
     private PatternSearchType searchType;
 
+    @Enumerated
+    @Column(nullable = false)
     private PatternDirectionType directionType;
 
+    @Enumerated
+    @Column(nullable = false)
     private PatternActionType actionType;
 
     private Integer serviceId;
diff --git a/src/main/java/ru/serega6531/packmate/model/Stream.java b/src/main/java/ru/serega6531/packmate/model/Stream.java
index 7ec6edf..685fc3f 100644
--- a/src/main/java/ru/serega6531/packmate/model/Stream.java
+++ b/src/main/java/ru/serega6531/packmate/model/Stream.java
@@ -37,9 +37,11 @@ public class Stream {
     @GeneratedValue(generator = "stream_generator")
     private Long id;
 
-    @Column(name = "service_id")
+    @Column(name = "service_id", nullable = false)
     private int service;
 
+    @Enumerated
+    @Column(nullable = false)
     private Protocol protocol;
 
     @OneToMany(mappedBy = "stream", cascade = CascadeType.ALL, orphanRemoval = true)
@@ -62,7 +64,7 @@ public class Stream {
 
     private boolean favorite;
 
-    @Column(columnDefinition = "smallint")
+    @Column(nullable = false, columnDefinition = "smallint")
     private int ttl;
 
     @Column(columnDefinition = "char(3)")