diff --git a/build.sbt b/build.sbt
index 5a972fd3..f5ff1fd5 100644
--- a/build.sbt
+++ b/build.sbt
@@ -1,6 +1,6 @@
 val mainScala     = "2.13.11"
 val allScala      = Seq("3.3.0", "2.13.11", "2.12.18")
-val zioVersion    = "2.0.15"
+val zioVersion    = "2.0.21"
 val zioAwsVersion = "6.20.83.2"
 
 inThisBuild(