diff --git a/pom.xml b/pom.xml
index ff2ca4d..6d6986d 100644
--- a/pom.xml
+++ b/pom.xml
@@ -18,7 +18,7 @@
         <maven.compiler.target>1.8</maven.compiler.target>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 
-        <lambda.version>0.10.10-dev</lambda.version>
+        <lambda.version>0.10.9</lambda.version>
         <sky.version>0.11.3.2</sky.version>
 
 
@@ -182,20 +182,20 @@
                     </execution>
                 </executions>
             </plugin>
-<!--            <plugin>-->
-<!--                <groupId>org.apache.maven.plugins</groupId>-->
-<!--                <artifactId>maven-gpg-plugin</artifactId>-->
-<!--                <version>1.5</version>-->
-<!--                <executions>-->
-<!--                    <execution>-->
-<!--                        <id>sign-artifacts</id>-->
-<!--                        <phase>verify</phase>-->
-<!--                        <goals>-->
-<!--                            <goal>sign</goal>-->
-<!--                        </goals>-->
-<!--                    </execution>-->
-<!--                </executions>-->
-<!--            </plugin>-->
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-gpg-plugin</artifactId>
+                <version>1.5</version>
+                <executions>
+                    <execution>
+                        <id>sign-artifacts</id>
+                        <phase>verify</phase>
+                        <goals>
+                            <goal>sign</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
         </plugins>
     </build>