diff --git a/doc/guacamole-example/pom.xml b/doc/guacamole-example/pom.xml
index d1f5d0f4b..1b3b29a7f 100644
--- a/doc/guacamole-example/pom.xml
+++ b/doc/guacamole-example/pom.xml
@@ -36,6 +36,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-war-plugin</artifactId>
+                <version>2.6</version>
                 <configuration>
                     <overlays>
                         <overlay>
diff --git a/guacamole-common/pom.xml b/guacamole-common/pom.xml
index c4de00582..552d82040 100644
--- a/guacamole-common/pom.xml
+++ b/guacamole-common/pom.xml
@@ -70,6 +70,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-source-plugin</artifactId>
+                <version>2.4</version>
                 <executions>
                     <execution>
                         <id>attach-sources</id>
@@ -84,6 +85,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-javadoc-plugin</artifactId>
+                <version>2.10.3</version>
                 <configuration>
                     <detectOfflineLinks>false</detectOfflineLinks>
                 </configuration>
diff --git a/guacamole-ext/pom.xml b/guacamole-ext/pom.xml
index 298207f7a..4dc59dad0 100644
--- a/guacamole-ext/pom.xml
+++ b/guacamole-ext/pom.xml
@@ -70,6 +70,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-source-plugin</artifactId>
+                <version>2.4</version>
                 <executions>
                     <execution>
                         <id>attach-sources</id>
@@ -84,6 +85,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-javadoc-plugin</artifactId>
+                <version>2.10.3</version>
                 <configuration>
                     <detectOfflineLinks>false</detectOfflineLinks>
                 </configuration>
diff --git a/guacamole/pom.xml b/guacamole/pom.xml
index 3d5847433..b221f59bf 100644
--- a/guacamole/pom.xml
+++ b/guacamole/pom.xml
@@ -69,6 +69,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-war-plugin</artifactId>
+                <version>2.6</version>
                 <configuration>
 
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