diff --git a/build.sbt b/build.sbt
index 567c5b68..93502d6e 100644
--- a/build.sbt
+++ b/build.sbt
@@ -18,7 +18,7 @@ ThisBuild / developers := List(
 ThisBuild / versionScheme := Some("early-semver")
 ThisBuild / homepage := Some(url("https://github.com/ocadotechnology/sttp-oauth2"))
 val Scala213 = "2.13.16"
-val Scala3 = "3.3.5"
+val Scala3 = "3.3.8"
 ThisBuild / scalaVersion := Scala213
 ThisBuild / crossScalaVersions := Seq(Scala213, Scala3)
 ThisBuild / githubWorkflowJavaVersions := Seq(JavaSpec.graalvm("21"))