diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 34b5261b..8117a650 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -16,7 +16,7 @@ jobs:
       fail-fast: false
       matrix:
         java: [8, 11]
-        scala: [2.12.17, 2.13.8, 3.1.2]
+        scala: [2.12.17, 2.13.15, 3.1.2]
         exclude:
           - java: 8
             scala: 2.13.1
@@ -64,7 +64,7 @@ jobs:
     strategy:
       matrix:
         java: [ 8 ]
-        scala: [ 2.12.11, 2.13.8 ]
+        scala: [ 2.12.11, 2.13.15 ]
 
     steps:
       - uses: actions/checkout@v2
diff --git a/build.sbt b/build.sbt
index 5c5d9876..a1079b88 100644
--- a/build.sbt
+++ b/build.sbt
@@ -21,8 +21,8 @@ skip in publish := true //required by sbt-ci-release
 
 def sharedSettings(publishForScala3: Boolean= true) = {
   Seq(
-    scalaVersion := "2.13.8",
-    crossScalaVersions := Seq("2.12.17", "2.13.8") ++ (if (publishForScala3) Seq("3.1.2") else Seq.empty)
+    scalaVersion := "2.13.15",
+    crossScalaVersions := Seq("2.12.17", "2.13.15") ++ (if (publishForScala3) Seq("3.1.2") else Seq.empty)
   ,
     publishArtifact := (CrossVersion.partialVersion(scalaVersion.value) match {
       case Some((3, _)) => publishForScala3