diff --git a/pom.xml b/pom.xml
index 5c11b07..4fb6027 100644
--- a/pom.xml
+++ b/pom.xml
@@ -48,7 +48,7 @@
         <dependency>
             <groupId>com.spotify</groupId>
             <artifactId>docker-client</artifactId>
-            <version>8.9.0</version>
+            <version>1.5.6.RELEASE</version>
         </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>
@@ -58,12 +58,12 @@
         <dependency>
             <groupId>javax.activation</groupId>
             <artifactId>activation</artifactId>
-            <version>1.1.1</version>
+            <version>1.5.6.RELEASE</version>
         </dependency>
         <dependency>
             <groupId>com.icegreen</groupId>
             <artifactId>greenmail-spring</artifactId>
-            <version>1.5.5</version>
+            <version>2.1.0</version>
             <scope>test</scope>
         </dependency>
         <dependency>