diff --git a/gradle.properties b/gradle.properties
index 2f2045553..101d11546 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,4 +1,4 @@
 # These properties are only used when this repository is built stand-alone, outside of devenv.
 org.gradle.jvmargs=-Xms512M -Xmx4G -Xss8M
-systemProp.spoofax2Version=2.5.18
+systemProp.spoofax2Version=2.6.0-SNAPSHOT
 systemProp.spoofax2DevenvVersion=0.1.34