diff --git a/.travis.yml b/.travis.yml
index eca38393..ff8d8a23 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -16,7 +16,7 @@ cache:
     - $HOME/.m2
 
 install:
-  - nvm install 4.1 && nvm use 4.1
+  - nvm install 7.5.0 && nvm use 7.5.0
 
 notifications:
   email:
diff --git a/transpiler/src/main/java/org/jsweet/transpiler/util/ProcessUtil.java b/transpiler/src/main/java/org/jsweet/transpiler/util/ProcessUtil.java
index 33ea8f6a..2fcbdf3d 100644
--- a/transpiler/src/main/java/org/jsweet/transpiler/util/ProcessUtil.java
+++ b/transpiler/src/main/java/org/jsweet/transpiler/util/ProcessUtil.java
@@ -37,7 +37,7 @@ import org.apache.log4j.Logger;
 public class ProcessUtil {
 	private final static Logger logger = Logger.getLogger(ProcessUtil.class);
 
-	public static final String NODE_MINIMUM_VERSION = "v7.5.0";
+	public static final String NODE_MINIMUM_VERSION = "v6.1.0";
 
 	private static boolean initialized = false;