diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 0b67fa91..69e7b604 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -11,7 +11,7 @@ jobs:
       fail-fast: false
       matrix:
         java: [ 8, 11 ]
-        scala: [ 2.12.14, 2.13.6, 3.0.0 ]
+        scala: [ 2.12.14, 2.13.15, 3.0.0 ]
     
     steps:
       - uses: actions/checkout@v2
@@ -29,7 +29,7 @@ jobs:
       fail-fast: true
       matrix:
         java: [8, 11]
-        scala: [ 2.12.14, 2.13.6, 3.0.0 ]
+        scala: [ 2.12.14, 2.13.15, 3.0.0 ]
         scalajs: [1.5.1]
     
     steps:
diff --git a/build.sbt b/build.sbt
index 6254a455..67cc87df 100644
--- a/build.sbt
+++ b/build.sbt
@@ -187,8 +187,8 @@ lazy val isDotty =
 
 // General Settings
 lazy val sharedSettings = Seq(
-  scalaVersion := "2.13.6",
-  crossScalaVersions := Seq("2.12.14", "2.13.6", "3.0.0"),
+  scalaVersion := "2.13.15",
+  crossScalaVersions := Seq("2.12.14", "2.13.15", "3.0.0"),
   scalacOptions ++= Seq(
     // warnings
     "-unchecked", // able additional warnings where generated code depends on assumptions