diff --git a/project/Build.scala b/project/Build.scala
index 0c8dfa1ddf84..eb5fb201089b 100644
--- a/project/Build.scala
+++ b/project/Build.scala
@@ -74,8 +74,8 @@ object Build {
    *  scala-library.
    */
   def stdlibVersion(implicit mode: Mode): String = mode match {
-    case NonBootstrapped => "2.13.4"
-    case Bootstrapped => "2.13.4"
+    case NonBootstrapped => "2.13.5"
+    case Bootstrapped => "2.13.5"
   }
 
   val dottyOrganization = "org.scala-lang"
diff --git a/sbt-dotty/sbt-test/scala2-compat/i8001/build.sbt b/sbt-dotty/sbt-test/scala2-compat/i8001/build.sbt
index 818af971469f..4f4ae373d2b1 100644
--- a/sbt-dotty/sbt-test/scala2-compat/i8001/build.sbt
+++ b/sbt-dotty/sbt-test/scala2-compat/i8001/build.sbt
@@ -1,5 +1,5 @@
 val scala3Version = sys.props("plugin.scalaVersion")
-val scala2Version = "2.13.4"
+val scala2Version = "2.13.5"
 
 lazy val lib = (project in file ("lib"))
   .settings(scalaVersion := scala2Version)
diff --git a/sbt-dotty/sbt-test/scala2-compat/i8847/build.sbt b/sbt-dotty/sbt-test/scala2-compat/i8847/build.sbt
index 7b620f9a7694..2ed3b7a520b9 100644
--- a/sbt-dotty/sbt-test/scala2-compat/i8847/build.sbt
+++ b/sbt-dotty/sbt-test/scala2-compat/i8847/build.sbt
@@ -1,5 +1,5 @@
 val scala3Version = sys.props("plugin.scalaVersion")
-val scala2Version = "2.13.4"
+val scala2Version = "2.13.5"
 
 lazy val `i8847-lib` = (project in file ("lib"))
   .settings(scalaVersion := scala2Version)
diff --git a/sbt-dotty/sbt-test/scala2-compat/i9916a/build.sbt b/sbt-dotty/sbt-test/scala2-compat/i9916a/build.sbt
index 480bb5e1193b..733b45e1b379 100644
--- a/sbt-dotty/sbt-test/scala2-compat/i9916a/build.sbt
+++ b/sbt-dotty/sbt-test/scala2-compat/i9916a/build.sbt
@@ -1,5 +1,5 @@
 val scala3Version = sys.props("plugin.scalaVersion")
-val scala2Version = "2.13.4"
+val scala2Version = "2.13.5"
 
 lazy val `i9916a-lib` = (project in file ("lib"))
   .settings(scalaVersion := scala2Version)
diff --git a/sbt-dotty/sbt-test/scala2-compat/i9916b/build.sbt b/sbt-dotty/sbt-test/scala2-compat/i9916b/build.sbt
index 1b7022040009..9a4e81163911 100644
--- a/sbt-dotty/sbt-test/scala2-compat/i9916b/build.sbt
+++ b/sbt-dotty/sbt-test/scala2-compat/i9916b/build.sbt
@@ -1,5 +1,5 @@
 val scala3Version = sys.props("plugin.scalaVersion")
-val scala2Version = "2.13.4"
+val scala2Version = "2.13.5"
 
 lazy val `i9916b-lib` = (project in file ("lib"))
   .settings(scalaVersion := scala2Version)
diff --git a/sbt-dotty/sbt-test/scala2-compat/longnames/build.sbt b/sbt-dotty/sbt-test/scala2-compat/longnames/build.sbt
index 67bfb8edb65f..61d8f34cd5f6 100644
--- a/sbt-dotty/sbt-test/scala2-compat/longnames/build.sbt
+++ b/sbt-dotty/sbt-test/scala2-compat/longnames/build.sbt
@@ -1,5 +1,5 @@
 val scala3Version = sys.props("plugin.scalaVersion")
-val scala2Version = "2.13.4"
+val scala2Version = "2.13.5"
 
 lazy val lib = (project in file ("lib"))
   .settings(scalaVersion := scala2Version)