diff --git a/build.sbt b/build.sbt
index cd7c4a9..26165b9 100644
--- a/build.sbt
+++ b/build.sbt
@@ -2,7 +2,7 @@ import Dependencies._
 
 name := "spray-json-derived-codecs"
 
-lazy val scala212               = "2.12.18"
+lazy val scala212               = "2.12.20"
 lazy val scala213               = "2.13.12"
 lazy val scala3                 = "3.3.1"
 lazy val supportedScalaVersions = List(scala212, scala213, scala3)