diff --git a/doc/dev.md b/doc/dev.md
index 6c3d4655..ec86deb0 100644
--- a/doc/dev.md
+++ b/doc/dev.md
@@ -43,7 +43,7 @@ Test the native version:
 
 ## Build
 
-To build this project, set `$GRAALVM_HOME` to the GraalVM distribution directory.
+To build this project, set `$GRAALVM_HOME` to the GraalVM distribution directory. Currently we are using GraalVM JDK8.
 
 Then run: