diff --git a/README.md b/README.md
index 4f6cf1f..a00e890 100644
--- a/README.md
+++ b/README.md
@@ -4,6 +4,7 @@ Remote Procedure Calls over the protobuf API
 # Requirements
 - openssl
 - tar
+- OpenJDK 8
 
 # Building
 Gradle will manage dependencies, generate code, compile the java, and package the code.