diff --git a/package.json b/package.json
index 4353e6b..43a9fbc 100644
--- a/package.json
+++ b/package.json
@@ -34,7 +34,7 @@
     "devDependencies":
     {
                             "destructible":                 "1.0.x",
-                            "proof":                        "5.0.x"
+                            "proof":                        "7.0.x"
     },
     "main":                 "procession",
     "scripts":