diff --git a/buildSrc/src/main/java/org/springframework/boot/build/classpath/CheckClasspathForProhibitedDependencies.java b/buildSrc/src/main/java/org/springframework/boot/build/classpath/CheckClasspathForProhibitedDependencies.java
index 005a900c88..56814c827e 100644
--- a/buildSrc/src/main/java/org/springframework/boot/build/classpath/CheckClasspathForProhibitedDependencies.java
+++ b/buildSrc/src/main/java/org/springframework/boot/build/classpath/CheckClasspathForProhibitedDependencies.java
@@ -96,6 +96,9 @@ public class CheckClasspathForProhibitedDependencies extends DefaultTask {
 		if (group.equals("org.apache.geronimo.specs")) {
 			return true;
 		}
+		if (group.equals("com.sun.activation")) {
+			return true;
+		}
 		return false;
 	}
 
diff --git a/spring-boot-project/spring-boot-dependencies/build.gradle b/spring-boot-project/spring-boot-dependencies/build.gradle
index d9d9941a6a..b0e1fbec8f 100644
--- a/spring-boot-project/spring-boot-dependencies/build.gradle
+++ b/spring-boot-project/spring-boot-dependencies/build.gradle
@@ -452,15 +452,7 @@ bom {
 			]
 		}
 	}
-	library("Jakarta Activation", "2.0.1") {
-		prohibit("[2.1.0-RC1,)") {
-			because "it exceeds our Jakarta EE 9 baseline"
-		}
-		group("com.sun.activation") {
-			modules = [
-				"jakarta.activation"
-			]
-		}
+	library("Jakarta Activation", "2.1.0") {
 		group("jakarta.activation") {
 			modules = [
 				"jakarta.activation-api"
diff --git a/spring-boot-project/spring-boot-test-autoconfigure/build.gradle b/spring-boot-project/spring-boot-test-autoconfigure/build.gradle
index 1119f2c521..eb4968cdf0 100644
--- a/spring-boot-project/spring-boot-test-autoconfigure/build.gradle
+++ b/spring-boot-project/spring-boot-test-autoconfigure/build.gradle
@@ -26,7 +26,8 @@ dependencies {
 	optional("org.hibernate.orm:hibernate-core")
 	optional("org.junit.jupiter:junit-jupiter-api")
 	optional("org.seleniumhq.selenium:htmlunit-driver") {
-		exclude group: "commons-logging", module: "commons-logging"
+		exclude(group: "commons-logging", module: "commons-logging")
+		exclude(group: "com.sun.activation", module: "jakarta.activation")
 	}
 	optional("org.seleniumhq.selenium:selenium-api")
 	optional("org.springframework:spring-orm")
diff --git a/spring-boot-project/spring-boot-test/build.gradle b/spring-boot-project/spring-boot-test/build.gradle
index 530a616460..3094feadbd 100644
--- a/spring-boot-project/spring-boot-test/build.gradle
+++ b/spring-boot-project/spring-boot-test/build.gradle
@@ -29,6 +29,7 @@ dependencies {
 	optional("org.skyscreamer:jsonassert")
 	optional("org.seleniumhq.selenium:htmlunit-driver") {
 		exclude(group: "commons-logging", module: "commons-logging")
+		exclude(group: "com.sun.activation", module: "jakarta.activation")
 	}
 	optional("org.seleniumhq.selenium:selenium-api")
 	optional("org.springframework:spring-test")
diff --git a/spring-boot-tests/spring-boot-smoke-tests/spring-boot-smoke-test-test/build.gradle b/spring-boot-tests/spring-boot-smoke-tests/spring-boot-smoke-test-test/build.gradle
index c67dfd4f9c..3544726c57 100644
--- a/spring-boot-tests/spring-boot-smoke-tests/spring-boot-smoke-test-test/build.gradle
+++ b/spring-boot-tests/spring-boot-smoke-tests/spring-boot-smoke-test-test/build.gradle
@@ -19,5 +19,6 @@ dependencies {
 	testImplementation("org.seleniumhq.selenium:selenium-api")
 	testImplementation("org.seleniumhq.selenium:htmlunit-driver") {
 		exclude group: "commons-logging", module: "commons-logging"
+		exclude(group: "com.sun.activation", module: "jakarta.activation")
 	}
 }