diff --git a/fr/index.ts b/fr/index.ts
index 9d22c5346b..e6a1dc8c8a 100644
--- a/fr/index.ts
+++ b/fr/index.ts
@@ -53,7 +53,7 @@ import l3_ch11 from './3/11-savinggasstorage.md'
 import l3_ch12 from './3/12-forloops.md'
 import l3_ch13 from './3/13-wrappingitup.md'
 import l3_complete from './3/14-lessoncomplete.md'
-
+/*
 // lesson4
 import l4_overview from './4/00-overview.md'
 import l4_payable from './4/payable.md'
@@ -69,7 +69,7 @@ import l4_ch8 from './4/battle-08.md'
 import l4_ch9 from './4/battle-09.md'
 import l4_ch10 from './4/wrappingitup.md'
 import l4_complete from './4/lessoncomplete.md'
-
+*/
 // chapterList is an ordered array of chapters. The order represents the order of the chapters.
 // chapter index will be 1-based and not zero-based. First chapter is 1
 
@@ -126,7 +126,7 @@ export default {
     l3_ch12,
     l3_ch13,
     l3_complete
-  ],
+  ]/*,
   4: [
     l4_overview,
     l4_payable,
@@ -142,5 +142,5 @@ export default {
     l4_ch9,
     l4_ch10,
     l4_complete
-  ]
+  ]*/
 }
diff --git a/ru/4/00-overview.md b/ru/4/00-overview.md
index f903acab67..86ca3cfe63 100644
--- a/ru/4/00-overview.md
+++ b/ru/4/00-overview.md
@@ -10,4 +10,4 @@ roadmap: roadmap3.png
 
 Битвы зомби — развлечение не для слабонервных...
 
-В этом уроке мы объединим все изученные в предыдущих главах концепции и создадим функцию зомби-битв. А еще разберемся с функциями `payable` и узнаем, как наделить DApps способностью получать деньги от игроков.
+В этом уроке мы объединим все изученные в предыдущих главах концепции и создадим функцию зомби-битв. А еще разберемся с функциями **payable** и узнаем, как наделить DApps способностью получать деньги от игроков.
diff --git a/ru/4/battle-02.md b/ru/4/battle-02.md
index f3f922256a..f168fc371b 100644
--- a/ru/4/battle-02.md
+++ b/ru/4/battle-02.md
@@ -7,6 +7,8 @@ material:
     language: sol
     startingCode:
       "zombieattack.sol": |
+        pragma solidity ^0.4.19;
+
         import "./zombiehelper.sol";
 
         contract ZombieBattle is ZombieHelper {
@@ -203,6 +205,8 @@ material:
 
         }
     answer: >
+      pragma solidity ^0.4.19;
+
       import "./zombiehelper.sol";
 
       contract ZombieBattle is ZombieHelper {
diff --git a/ru/4/battle-03.md b/ru/4/battle-03.md
index 2981ff6b8f..f025608c04 100644
--- a/ru/4/battle-03.md
+++ b/ru/4/battle-03.md
@@ -7,6 +7,8 @@ material:
     language: sol
     startingCode:
       "zombieattack.sol": |
+        pragma solidity ^0.4.19;
+
         import "./zombiehelper.sol";
 
         contract ZombieBattle is ZombieHelper {
@@ -211,6 +213,8 @@ material:
 
         }
     answer: >
+      pragma solidity ^0.4.19;
+      
       import "./zombiehelper.sol";
 
       contract ZombieBattle is ZombieHelper {
diff --git a/ru/4/battle-06.md b/ru/4/battle-06.md
index 13d5d99150..cac1b62777 100644
--- a/ru/4/battle-06.md
+++ b/ru/4/battle-06.md
@@ -7,6 +7,8 @@ material:
     language: sol
     startingCode:
       "zombieattack.sol": |
+        pragma solidity ^0.4.19;
+
         import "./zombiehelper.sol";
 
         contract ZombieBattle is ZombieHelper {
@@ -211,6 +213,8 @@ material:
 
         }
     answer: >
+      pragma solidity ^0.4.19;
+      
       import "./zombiehelper.sol";
 
       contract ZombieBattle is ZombieHelper {
diff --git a/ru/4/battle-08.md b/ru/4/battle-08.md
index 9a1d4d8379..aeb980f637 100644
--- a/ru/4/battle-08.md
+++ b/ru/4/battle-08.md
@@ -7,6 +7,8 @@ material:
     language: sol
     startingCode:
       "zombieattack.sol": |
+        pragma solidity ^0.4.19;
+
         import "./zombiehelper.sol";
 
         contract ZombieBattle is ZombieHelper {
@@ -213,6 +215,8 @@ material:
 
         }
     answer: >
+      pragma solidity ^0.4.19;
+      
       import "./zombiehelper.sol";
 
       contract ZombieBattle is ZombieHelper {
diff --git a/ru/4/battle-09.md b/ru/4/battle-09.md
index 17b567aab0..805957f80d 100644
--- a/ru/4/battle-09.md
+++ b/ru/4/battle-09.md
@@ -7,6 +7,8 @@ material:
     language: sol
     startingCode:
       "zombieattack.sol": |
+        pragma solidity ^0.4.19;
+
         import "./zombiehelper.sol";
 
         contract ZombieBattle is ZombieHelper {
@@ -218,6 +220,8 @@ material:
 
         }
     answer: >
+      pragma solidity ^0.4.19;
+      
       import "./zombiehelper.sol";
 
       contract ZombieBattle is ZombieHelper {
diff --git a/ru/index.ts b/ru/index.ts
index 93fd77b8c6..e6a1dc8c8a 100644
--- a/ru/index.ts
+++ b/ru/index.ts
@@ -38,7 +38,6 @@ import wrappingitup from './2/14-wrappingitup.md'
 import lesson2complete from './2/15-lessoncomplete.md'
 
 // lesson3
-
 import l3_overview from './3/00-overview.md'
 import l3_ch1 from './3/01-externaldependencies.md'
 import l3_ch2 from './3/02-ownable.md'
@@ -54,8 +53,23 @@ import l3_ch11 from './3/11-savinggasstorage.md'
 import l3_ch12 from './3/12-forloops.md'
 import l3_ch13 from './3/13-wrappingitup.md'
 import l3_complete from './3/14-lessoncomplete.md'
-
-
+/*
+// lesson4
+import l4_overview from './4/00-overview.md'
+import l4_payable from './4/payable.md'
+import l4_withdraw from './4/withdraw.md'
+import l4_ch1 from './4/battle-01.md'
+import l4_ch2 from './4/battle-02.md'
+import l4_ch3 from './4/battle-03.md'
+import l4_ch4 from './4/battle-04.md'
+import l4_ch5 from './4/battle-05.md'
+import l4_ch6 from './4/battle-06.md'
+import l4_ch7 from './4/battle-07.md'
+import l4_ch8 from './4/battle-08.md'
+import l4_ch9 from './4/battle-09.md'
+import l4_ch10 from './4/wrappingitup.md'
+import l4_complete from './4/lessoncomplete.md'
+*/
 // chapterList is an ordered array of chapters. The order represents the order of the chapters.
 // chapter index will be 1-based and not zero-based. First chapter is 1
 
@@ -112,5 +126,21 @@ export default {
     l3_ch12,
     l3_ch13,
     l3_complete
-  ]
+  ]/*,
+  4: [
+    l4_overview,
+    l4_payable,
+    l4_withdraw,
+    l4_ch1,
+    l4_ch2,
+    l4_ch3,
+    l4_ch4,
+    l4_ch5,
+    l4_ch6,
+    l4_ch7,
+    l4_ch8,
+    l4_ch9,
+    l4_ch10,
+    l4_complete
+  ]*/
 }
diff --git a/tr/index.ts b/tr/index.ts
index 239dbf4d57..15f44d9b9a 100644
--- a/tr/index.ts
+++ b/tr/index.ts
@@ -18,7 +18,7 @@ import puttingittogether from './1/puttingittogether.md'
 import events from './1/events.md'
 import web3js from './1/web3js.md'
 import lessoncomplete from './1/lessoncomplete.md'
-
+/*
 // lesson2
 import l2_overview from './2/00-overview.md'
 import overview from './2/1-overview.md'
@@ -69,7 +69,7 @@ import l4_ch8 from './4/battle-08.md'
 import l4_ch9 from './4/battle-09.md'
 import l4_ch10 from './4/wrappingitup.md'
 import l4_complete from './4/lessoncomplete.md'
-
+*/
 // chapterList is an ordered array of chapters. The order represents the order of the chapters.
 // chapter index will be 1-based and not zero-based. First chapter is 1
 
@@ -91,7 +91,7 @@ export default {
     events,
     web3js,
     lessoncomplete
-  ],
+  ]/*,
   2: [
     l2_overview,
     overview,
@@ -142,5 +142,5 @@ export default {
     l4_ch9,
     l4_ch10,
     l4_complete
-  ]
+  ]*/
 }
\ No newline at end of file