diff --git a/DEX/package.json b/DEX/package.json
index b93f4cf..5f541e6 100644
--- a/DEX/package.json
+++ b/DEX/package.json
@@ -6,7 +6,7 @@
   "license": "MIT",
   "devDependencies": {
     "@acala-network/contracts": "^4.3.4",
-    "@openzeppelin/contracts": "~4.4.2",
+    "@openzeppelin/contracts": "~4.9.2",
     "@truffle/hdwallet-provider": "^2.1.11",
     "ethers": "~5.5.0",
     "truffle": "^5.9.3"
diff --git a/EVM/package.json b/EVM/package.json
index bd6a2ca..39225be 100644
--- a/EVM/package.json
+++ b/EVM/package.json
@@ -6,7 +6,7 @@
   "license": "MIT",
   "devDependencies": {
     "@acala-network/contracts": "^4.3.4",
-    "@openzeppelin/contracts": "~4.4.2",
+    "@openzeppelin/contracts": "~4.9.2",
     "@truffle/hdwallet-provider": "^2.1.11",
     "ethers": "~5.5.0",
     "truffle": "^5.9.3",
diff --git a/NFT/package.json b/NFT/package.json
index 45a46df..1104dc6 100644
--- a/NFT/package.json
+++ b/NFT/package.json
@@ -5,7 +5,7 @@
   "author": "Jan Turk",
   "license": "MIT",
   "devDependencies": {
-    "@openzeppelin/contracts": "~4.4.2",
+    "@openzeppelin/contracts": "~4.9.2",
     "@truffle/hdwallet-provider": "^2.1.11",
     "truffle": "^5.9.3",
     "truffle-assertions": "^0.9.2"
diff --git a/advanced-escrow/package.json b/advanced-escrow/package.json
index 3cc6f62..ef5e2f9 100644
--- a/advanced-escrow/package.json
+++ b/advanced-escrow/package.json
@@ -6,7 +6,7 @@
   "license": "MIT",
   "devDependencies": {
     "@acala-network/contracts": "^4.3.4",
-    "@openzeppelin/contracts": "~4.4.2",
+    "@openzeppelin/contracts": "~4.9.2",
     "@polkadot/api": "8.1.1",
     "@truffle/hdwallet-provider": "^2.1.11",
     "console.mute": "^0.3.0",
diff --git a/precompiled-token/package.json b/precompiled-token/package.json
index 47e23fd..1aec6bc 100644
--- a/precompiled-token/package.json
+++ b/precompiled-token/package.json
@@ -6,7 +6,7 @@
   "license": "MIT",
   "devDependencies": {
     "@acala-network/contracts": "^4.3.4",
-    "@openzeppelin/contracts": "~4.4.2",
+    "@openzeppelin/contracts": "~4.9.2",
     "@truffle/hdwallet-provider": "^2.1.11",
     "ethers": "~5.5.0",
     "truffle": "^5.9.3",
diff --git a/token/package.json b/token/package.json
index 16a082e..1e572af 100644
--- a/token/package.json
+++ b/token/package.json
@@ -5,7 +5,7 @@
   "author": "Jan Turk",
   "license": "MIT",
   "devDependencies": {
-    "@openzeppelin/contracts": "~4.4.2",
+    "@openzeppelin/contracts": "~4.9.2",
     "@truffle/hdwallet-provider": "^2.1.11",
     "truffle": "^5.9.3",
     "truffle-assertions": "^0.9.2"
diff --git a/yarn.lock b/yarn.lock
index 346e425..53f420a 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1389,10 +1389,10 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@openzeppelin/contracts@npm:~4.4.2":
-  version: 4.4.2
-  resolution: "@openzeppelin/contracts@npm:4.4.2"
-  checksum: 5c6be7bfe757c6a43eb5b24aa9c61a79deaed9de4bc5f59356b35f5519b0fb340f4da8b4df99588bded5e6b6a773fc54961917a1c657063247c1763f9752bd0e
+"@openzeppelin/contracts@npm:~4.9.2":
+  version: 4.9.2
+  resolution: "@openzeppelin/contracts@npm:4.9.2"
+  checksum: 0538b18fe222e5414a5a539c240b155e0bef2a23c5182fb8e137d71a0c390fe899160f2d55701f75b127f54cc61aee4375370acc832475f19829368ac65c1fc6
   languageName: node
   linkType: hard
 
@@ -9336,7 +9336,7 @@ __metadata:
   resolution: "truffle-tutorial-advanced-escrow@workspace:advanced-escrow"
   dependencies:
     "@acala-network/contracts": ^4.3.4
-    "@openzeppelin/contracts": ~4.4.2
+    "@openzeppelin/contracts": ~4.9.2
     "@polkadot/api": 8.1.1
     "@truffle/hdwallet-provider": ^2.1.11
     console.mute: ^0.3.0
@@ -9351,7 +9351,7 @@ __metadata:
   resolution: "truffle-tutorial-dex@workspace:DEX"
   dependencies:
     "@acala-network/contracts": ^4.3.4
-    "@openzeppelin/contracts": ~4.4.2
+    "@openzeppelin/contracts": ~4.9.2
     "@truffle/hdwallet-provider": ^2.1.11
     ethers: ~5.5.0
     truffle: ^5.9.3
@@ -9372,7 +9372,7 @@ __metadata:
   resolution: "truffle-tutorial-evm@workspace:EVM"
   dependencies:
     "@acala-network/contracts": ^4.3.4
-    "@openzeppelin/contracts": ~4.4.2
+    "@openzeppelin/contracts": ~4.9.2
     "@truffle/hdwallet-provider": ^2.1.11
     ethers: ~5.5.0
     truffle: ^5.9.3
@@ -9393,7 +9393,7 @@ __metadata:
   version: 0.0.0-use.local
   resolution: "truffle-tutorial-nft@workspace:NFT"
   dependencies:
-    "@openzeppelin/contracts": ~4.4.2
+    "@openzeppelin/contracts": ~4.9.2
     "@truffle/hdwallet-provider": ^2.1.11
     truffle: ^5.9.3
     truffle-assertions: ^0.9.2
@@ -9405,7 +9405,7 @@ __metadata:
   resolution: "truffle-tutorial-precompiled-token@workspace:precompiled-token"
   dependencies:
     "@acala-network/contracts": ^4.3.4
-    "@openzeppelin/contracts": ~4.4.2
+    "@openzeppelin/contracts": ~4.9.2
     "@truffle/hdwallet-provider": ^2.1.11
     ethers: ~5.5.0
     truffle: ^5.9.3
@@ -9417,7 +9417,7 @@ __metadata:
   version: 0.0.0-use.local
   resolution: "truffle-tutorial-token@workspace:token"
   dependencies:
-    "@openzeppelin/contracts": ~4.4.2
+    "@openzeppelin/contracts": ~4.9.2
     "@truffle/hdwallet-provider": ^2.1.11
     truffle: ^5.9.3
     truffle-assertions: ^0.9.2