diff --git a/pom.xml b/pom.xml
index f66f2d2..0cfa0ea 100644
--- a/pom.xml
+++ b/pom.xml
@@ -82,7 +82,7 @@
 		<spring-boot.version>3.4.4</spring-boot.version>
 		<jackson.version>2.17.2</jackson.version>
 		<junit.version>5.10.5</junit.version>
-		<assertj.version>3.26.3</assertj.version>
+		<assertj.version>3.27.3</assertj.version>
 		<!-- documentation dependencies -->
 		<io.spring.maven.antora-version>0.0.4</io.spring.maven.antora-version>
 		<!-- FIXME build failure with version 2.3.9: -->
diff --git a/samples/grpc-client/pom.xml b/samples/grpc-client/pom.xml
index 88e359e..2727435 100644
--- a/samples/grpc-client/pom.xml
+++ b/samples/grpc-client/pom.xml
@@ -30,8 +30,8 @@
 	<properties>
 		<java.version>17</java.version>
 		<spring-javaformat-maven-plugin.version>0.0.39</spring-javaformat-maven-plugin.version>
-		<protobuf-java.version>3.25.6</protobuf-java.version>
-		<grpc.version>1.70.0</grpc.version>
+		<protobuf-java.version>4.30.2</protobuf-java.version>
+		<grpc.version>1.72.0</grpc.version>
 		<maven.version>3.9.4</maven.version>
 		<maven.resolver.version>1.9.18</maven.resolver.version>
 	</properties>
diff --git a/samples/grpc-oauth2/pom.xml b/samples/grpc-oauth2/pom.xml
index 1a20271..8f45d48 100644
--- a/samples/grpc-oauth2/pom.xml
+++ b/samples/grpc-oauth2/pom.xml
@@ -30,8 +30,8 @@
 	<properties>
 		<java.version>17</java.version>
 		<spring-javaformat-maven-plugin.version>0.0.43</spring-javaformat-maven-plugin.version>
-		<protobuf-java.version>3.25.6</protobuf-java.version>
-		<grpc.version>1.70.0</grpc.version>
+		<protobuf-java.version>4.30.2</protobuf-java.version>
+		<grpc.version>1.72.0</grpc.version>
 	</properties>
 	<dependencyManagement>
 		<dependencies>
diff --git a/samples/grpc-reactive/pom.xml b/samples/grpc-reactive/pom.xml
index 88b84bf..79e957a 100644
--- a/samples/grpc-reactive/pom.xml
+++ b/samples/grpc-reactive/pom.xml
@@ -30,8 +30,8 @@
 	<properties>
 		<java.version>17</java.version>
 		<spring-javaformat-maven-plugin.version>0.0.43</spring-javaformat-maven-plugin.version>
-		<protobuf-java.version>3.25.6</protobuf-java.version>
-		<grpc.version>1.70.0</grpc.version>
+		<protobuf-java.version>4.30.2</protobuf-java.version>
+		<grpc.version>1.72.0</grpc.version>
 	</properties>
 	<dependencyManagement>
 		<dependencies>
diff --git a/samples/grpc-secure/pom.xml b/samples/grpc-secure/pom.xml
index 5b85029..c901520 100644
--- a/samples/grpc-secure/pom.xml
+++ b/samples/grpc-secure/pom.xml
@@ -30,8 +30,8 @@
 	<properties>
 		<java.version>17</java.version>
 		<spring-javaformat-maven-plugin.version>0.0.43</spring-javaformat-maven-plugin.version>
-		<protobuf-java.version>3.25.6</protobuf-java.version>
-		<grpc.version>1.70.0</grpc.version>
+		<protobuf-java.version>4.30.2</protobuf-java.version>
+		<grpc.version>1.72.0</grpc.version>
 	</properties>
 	<dependencyManagement>
 		<dependencies>
diff --git a/samples/grpc-server-netty-shaded/pom.xml b/samples/grpc-server-netty-shaded/pom.xml
index e33f75a..595ee3d 100644
--- a/samples/grpc-server-netty-shaded/pom.xml
+++ b/samples/grpc-server-netty-shaded/pom.xml
@@ -17,8 +17,8 @@
 	<properties>
 		<java.version>17</java.version>
 		<spring-javaformat-maven-plugin.version>0.0.43</spring-javaformat-maven-plugin.version>
-		<protobuf-java.version>3.25.6</protobuf-java.version>
-		<grpc.version>1.70.0</grpc.version>
+		<protobuf-java.version>4.30.2</protobuf-java.version>
+		<grpc.version>1.72.0</grpc.version>
 	</properties>
 	<dependencyManagement>
 		<dependencies>
diff --git a/samples/grpc-server/pom.xml b/samples/grpc-server/pom.xml
index 9cc1641..f22d956 100644
--- a/samples/grpc-server/pom.xml
+++ b/samples/grpc-server/pom.xml
@@ -30,8 +30,8 @@
 	<properties>
 		<java.version>17</java.version>
 		<spring-javaformat-maven-plugin.version>0.0.43</spring-javaformat-maven-plugin.version>
-		<protobuf-java.version>3.25.6</protobuf-java.version>
-		<grpc.version>1.70.0</grpc.version>
+		<protobuf-java.version>4.30.2</protobuf-java.version>
+		<grpc.version>1.72.0</grpc.version>
 	</properties>
 	<dependencyManagement>
 		<dependencies>
diff --git a/samples/grpc-tomcat-secure/pom.xml b/samples/grpc-tomcat-secure/pom.xml
index cfa090a..2220415 100644
--- a/samples/grpc-tomcat-secure/pom.xml
+++ b/samples/grpc-tomcat-secure/pom.xml
@@ -30,8 +30,8 @@
 	<properties>
 		<java.version>17</java.version>
 		<spring-javaformat-maven-plugin.version>0.0.43</spring-javaformat-maven-plugin.version>
-		<protobuf-java.version>3.25.6</protobuf-java.version>
-		<grpc.version>1.70.0</grpc.version>
+		<protobuf-java.version>4.30.2</protobuf-java.version>
+		<grpc.version>1.72.0</grpc.version>
 	</properties>
 	<dependencyManagement>
 		<dependencies>
diff --git a/samples/grpc-tomcat/pom.xml b/samples/grpc-tomcat/pom.xml
index 67ba38b..785524f 100644
--- a/samples/grpc-tomcat/pom.xml
+++ b/samples/grpc-tomcat/pom.xml
@@ -30,8 +30,8 @@
 	<properties>
 		<java.version>17</java.version>
 		<spring-javaformat-maven-plugin.version>0.0.43</spring-javaformat-maven-plugin.version>
-		<protobuf-java.version>3.25.6</protobuf-java.version>
-		<grpc.version>1.70.0</grpc.version>
+		<protobuf-java.version>4.30.2</protobuf-java.version>
+		<grpc.version>1.72.0</grpc.version>
 	</properties>
 	<dependencyManagement>
 		<dependencies>
diff --git a/samples/grpc-webflux/pom.xml b/samples/grpc-webflux/pom.xml
index 1395181..43909c4 100644
--- a/samples/grpc-webflux/pom.xml
+++ b/samples/grpc-webflux/pom.xml
@@ -30,8 +30,8 @@
 	<properties>
 		<java.version>17</java.version>
 		<spring-javaformat-maven-plugin.version>0.0.43</spring-javaformat-maven-plugin.version>
-		<protobuf-java.version>3.25.6</protobuf-java.version>
-		<grpc.version>1.70.0</grpc.version>
+		<protobuf-java.version>4.30.2</protobuf-java.version>
+		<grpc.version>1.72.0</grpc.version>
 	</properties>
 	<dependencyManagement>
 		<dependencies>
diff --git a/spring-grpc-dependencies/pom.xml b/spring-grpc-dependencies/pom.xml
index fd4791c..f76d835 100644
--- a/spring-grpc-dependencies/pom.xml
+++ b/spring-grpc-dependencies/pom.xml
@@ -49,9 +49,9 @@
 	</licenses>
 
 	<properties>
-		<grpc.version>1.70.0</grpc.version>
-		<protobuf-java.version>3.25.6</protobuf-java.version>
-		<google-common-protos.version>2.46.0</google-common-protos.version>
+		<grpc.version>1.72.0</grpc.version>
+		<protobuf-java.version>4.30.2</protobuf-java.version>
+		<google-common-protos.version>2.54.1</google-common-protos.version>
 		<micrometer.version>1.13.6</micrometer.version>
 		<reactor-grpc.version>1.2.4</reactor-grpc.version>
 		<spring-javaformat-maven-plugin.version>0.0.43</spring-javaformat-maven-plugin.version>