diff --git a/beacon_chain/spec/datatypes/base.nim b/beacon_chain/spec/datatypes/base.nim
index c58ec8c3e..9eacae9dc 100644
--- a/beacon_chain/spec/datatypes/base.nim
+++ b/beacon_chain/spec/datatypes/base.nim
@@ -74,7 +74,7 @@ export
   tables, results, endians2, json_serialization, sszTypes, beacon_time, crypto,
   digest, presets
 
-const SPEC_VERSION* = "1.5.0-alpha.4"
+const SPEC_VERSION* = "1.5.0-alpha.5"
 ## Spec version we're aiming to be compatible with, right now
 
 const
diff --git a/vendor/nim-eth2-scenarios b/vendor/nim-eth2-scenarios
index 70796750e..4748d8387 160000
--- a/vendor/nim-eth2-scenarios
+++ b/vendor/nim-eth2-scenarios
@@ -1 +1 @@
-Subproject commit 70796750ec065b6e99c0f9ae030bad61fb213b4b
+Subproject commit 4748d838797fd42bcb57c38f682adcb4522a152a