diff --git a/build.sbt b/build.sbt
index bf7165f1..c61457f0 100644
--- a/build.sbt
+++ b/build.sbt
@@ -1,6 +1,6 @@
 import com.typesafe.tools.mima.core.{MissingClassProblem, ProblemFilters}
 
-val scala212 = "2.12.20"
+val scala212 = "2.12.21"
 val scala213 = "2.13.18"
 val scala3 = "3.3.7"