diff --git a/build.sbt b/build.sbt
index af91c1e..e1be32f 100644
--- a/build.sbt
+++ b/build.sbt
@@ -1,7 +1,7 @@
 ThisBuild / name := "zio-slack"
 ThisBuild / organization := "com.github.dapperware"
 
-val mainScala = "2.12.17"
+val mainScala = "2.12.20"
 val allScala  = Seq("2.13.14", mainScala, "3.3.4")
 
 inThisBuild(