diff --git a/build.gradle b/build.gradle
index 15fbb038a6..5edc796139 100644
--- a/build.gradle
+++ b/build.gradle
@@ -44,7 +44,7 @@ def hdrHistogramVersion = '2.1.12'
 def jmhVersion = '1.37'
 def byteBuddyVersion = '1.14.13'
 
-def agronaVersion = '1.20.0'
+def agronaVersion = '1.21.1'
 def sbeVersion = '1.30.0'
 def aeronVersion = '1.43.0'
 def artioGroup = 'uk.co.real-logic'