diff --git a/api/build.gradle b/api/build.gradle
index 693a3c2..c7abfc4 100644
--- a/api/build.gradle
+++ b/api/build.gradle
@@ -14,8 +14,8 @@ dependencies {
 
     testImplementation project(':tests')
 
-    testImplementation 'org.testcontainers:testcontainers:1.17.3'
-    testImplementation 'org.testcontainers:junit-jupiter:1.17.3'
+    testImplementation 'org.testcontainers:testcontainers:1.20.1'
+    testImplementation 'org.testcontainers:junit-jupiter:1.20.1'
     testImplementation 'org.awaitility:awaitility:4.2.0'
     testImplementation 'org.hamcrest:hamcrest:2.2'
 
diff --git a/pallet/build.gradle b/pallet/build.gradle
index e683a38..edd7fc7 100644
--- a/pallet/build.gradle
+++ b/pallet/build.gradle
@@ -10,8 +10,8 @@ dependencies {
 
     testAnnotationProcessor project(':rpc:rpc-codegen')
 
-    testImplementation 'org.testcontainers:testcontainers:1.17.3'
-    testImplementation 'org.testcontainers:junit-jupiter:1.17.3'
+    testImplementation 'org.testcontainers:testcontainers:1.20.1'
+    testImplementation 'org.testcontainers:junit-jupiter:1.20.1'
     testImplementation 'org.awaitility:awaitility:4.2.0'
     testImplementation 'org.hamcrest:hamcrest:2.2'
 }
\ No newline at end of file
diff --git a/rpc/rpc-api/build.gradle b/rpc/rpc-api/build.gradle
index 3d76e29..80dca71 100644
--- a/rpc/rpc-api/build.gradle
+++ b/rpc/rpc-api/build.gradle
@@ -12,8 +12,8 @@ dependencies {
 
     testAnnotationProcessor project(':scale:scale-codegen')
 
-    testImplementation 'org.testcontainers:testcontainers:1.17.3'
-    testImplementation 'org.testcontainers:junit-jupiter:1.17.3'
+    testImplementation 'org.testcontainers:testcontainers:1.20.1'
+    testImplementation 'org.testcontainers:junit-jupiter:1.20.1'
     testImplementation 'org.awaitility:awaitility:4.2.0'
     testImplementation 'org.hamcrest:hamcrest:2.2'
 }
\ No newline at end of file
diff --git a/rpc/rpc-api/src/test/java/com/strategyobject/substrateclient/rpc/api/SignedExtraTest.java b/rpc/rpc-api/src/test/java/com/strategyobject/substrateclient/rpc/api/SignedExtraTest.java
index 9098e6e..e5256a3 100644
--- a/rpc/rpc-api/src/test/java/com/strategyobject/substrateclient/rpc/api/SignedExtraTest.java
+++ b/rpc/rpc-api/src/test/java/com/strategyobject/substrateclient/rpc/api/SignedExtraTest.java
@@ -69,8 +69,8 @@ void testSignedExtra(boolean includeMetadataHash, String expectedHash) throws Ex
   @ParameterizedTest
   @CsvSource(
     {
-      "false,0x830000000100000077000000000000000000000000000000000000000000000000000000000000777700000000000000000000000000000000000000000000000000000000000077",
-      "true,0x83000000010000007700000000000000000000000000000000000000000000000000000000000077770000000000000000000000000000000000000000000000000000000000007700",
+      "false,0x8d0000000100000077000000000000000000000000000000000000000000000000000000000000777700000000000000000000000000000000000000000000000000000000000077",
+      "true,0x8d000000010000007700000000000000000000000000000000000000000000000000000000000077770000000000000000000000000000000000000000000000000000000000007700",
     }
   )
   void testSignedExtraAdditional(boolean includeMetadataHash, String expectedHash) throws Exception {
diff --git a/tests/build.gradle b/tests/build.gradle
index 9c56050..ee50841 100644
--- a/tests/build.gradle
+++ b/tests/build.gradle
@@ -1,4 +1,4 @@
 dependencies {
-    implementation 'org.testcontainers:testcontainers:1.17.3'
+    implementation 'org.testcontainers:testcontainers:1.20.1'
     implementation 'org.junit.jupiter:junit-jupiter-api:5.9.0'
 }
\ No newline at end of file
diff --git a/tests/src/main/java/com/strategyobject/substrateclient/tests/containers/FrequencyVersion.java b/tests/src/main/java/com/strategyobject/substrateclient/tests/containers/FrequencyVersion.java
index 7b325cc..64cb206 100644
--- a/tests/src/main/java/com/strategyobject/substrateclient/tests/containers/FrequencyVersion.java
+++ b/tests/src/main/java/com/strategyobject/substrateclient/tests/containers/FrequencyVersion.java
@@ -1,8 +1,8 @@
 package com.strategyobject.substrateclient.tests.containers;
 
 public class FrequencyVersion {
-    public static final String CURRENT_VERSION = "v1.15.0";
-    public static final Long SPEC = 131L;
+    public static final String CURRENT_VERSION = "v1.15.3";
+    public static final Long SPEC = 141L;
 
     private FrequencyVersion() {
     }
diff --git a/transport/build.gradle b/transport/build.gradle
index cb9d2c0..286cbf0 100644
--- a/transport/build.gradle
+++ b/transport/build.gradle
@@ -7,8 +7,8 @@ dependencies {
 
     annotationProcessor project(':scale:scale-codegen')
     testImplementation project(':tests')
-    testImplementation 'org.testcontainers:testcontainers:1.17.3'
-    testImplementation 'org.testcontainers:junit-jupiter:1.17.3'
-    testImplementation 'org.testcontainers:toxiproxy:1.17.3'
+    testImplementation 'org.testcontainers:testcontainers:1.20.1'
+    testImplementation 'org.testcontainers:junit-jupiter:1.20.1'
+    testImplementation 'org.testcontainers:toxiproxy:1.20.1'
     testImplementation 'org.awaitility:awaitility:4.2.0'
 }
\ No newline at end of file