diff --git a/build.gradle b/build.gradle
index d6e1ce4fbbd..eef80c4b8cc 100644
--- a/build.gradle
+++ b/build.gradle
@@ -324,7 +324,7 @@ allprojects {
 }
 
 def nightly = System.getenv("NIGHTLY") != null
-def refTestVersion = nightly ? "nightly" : "v1.5.0-beta.4"
+def refTestVersion = nightly ? "nightly" : "v1.5.0-beta.5"
 def blsRefTestVersion = 'v0.1.2'
 def slashingProtectionInterchangeRefTestVersion = 'v5.3.0'
 def refTestBaseUrl = 'https://github.com/ethereum/consensus-spec-tests/releases/download'