diff --git a/spec.json b/spec.json
index 8cf2ff3..e8ba9b5 100644
--- a/spec.json
+++ b/spec.json
@@ -41,7 +41,8 @@
     "eip145Transition": 6464300,
     "eip1014Transition": 6464300,
     "eip1052Transition": 6464300,
-    "eip1283Transition": 6464300
+    "eip1283Transition": 6464300,
+    "eip1283DisableTransition": 7026400
   },
   "genesis": {
     "seal": {