diff --git a/pom.xml b/pom.xml
index 28626d87..29a33b97 100644
--- a/pom.xml
+++ b/pom.xml
@@ -47,13 +47,13 @@
     <dependency>
       <groupId>org.apache.commons</groupId>
       <artifactId>commons-compress</artifactId>
-      <version>1.9</version>
+      <version>1.10</version>
     </dependency>
 
     <dependency>
       <groupId>org.jruby</groupId>
       <artifactId>jruby-complete</artifactId>
-      <version>1.7.19</version>
+      <version>9.0.0.0</version>
     </dependency>
 
     <dependency>
@@ -65,7 +65,7 @@
     <dependency>
       <groupId>io.netty</groupId>
       <artifactId>netty-all</artifactId>
-      <version>4.0.27.Final</version>
+      <version>4.0.30.Final</version>
       <scope>compile</scope>
     </dependency>
 
@@ -78,7 +78,7 @@
     <dependency>
       <groupId>com.mchange</groupId>
       <artifactId>c3p0</artifactId>
-      <version>0.9.5</version>
+      <version>0.9.5.1</version>
     </dependency>
 
     <dependency>