diff --git a/chapter09/tacocloud-email/pom.xml b/chapter09/tacocloud-email/pom.xml
index 948b94a6..f240efd1 100644
--- a/chapter09/tacocloud-email/pom.xml
+++ b/chapter09/tacocloud-email/pom.xml
@@ -39,7 +39,7 @@
         <dependency>
             <groupId>javax.mail</groupId>
             <artifactId>mail</artifactId>
-            <version>1.4</version>
+            <version>1.4.7</version>
         </dependency>
         <dependency>
             <groupId>org.apache.commons</groupId>
diff --git a/chapter11-12-cassandra/tacocloud-email/pom.xml b/chapter11-12-cassandra/tacocloud-email/pom.xml
index 18d38d35..d46032be 100644
--- a/chapter11-12-cassandra/tacocloud-email/pom.xml
+++ b/chapter11-12-cassandra/tacocloud-email/pom.xml
@@ -39,7 +39,7 @@
         <dependency>
             <groupId>javax.mail</groupId>
             <artifactId>mail</artifactId>
-            <version>1.4</version>
+            <version>1.4.7</version>
         </dependency>
         <dependency>
             <groupId>org.apache.commons</groupId>
diff --git a/chapter11-12-mongodb/tacocloud-email/pom.xml b/chapter11-12-mongodb/tacocloud-email/pom.xml
index d9ed98ef..01e1fd38 100644
--- a/chapter11-12-mongodb/tacocloud-email/pom.xml
+++ b/chapter11-12-mongodb/tacocloud-email/pom.xml
@@ -39,7 +39,7 @@
         <dependency>
             <groupId>javax.mail</groupId>
             <artifactId>mail</artifactId>
-            <version>1.4</version>
+            <version>1.4.7</version>
         </dependency>
         <dependency>
             <groupId>org.apache.commons</groupId>