diff --git a/.travis.yml b/.travis.yml
index 714aaabaf..ea6789364 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -30,10 +30,13 @@ before_install:
 
 install:
   - sdk install java $TRAVIS_JDK
+  - bin/fixpreloaded.sh
   - unset _JAVA_OPTIONS
   - java -Xmx32m -version
   # detect sbt version from project/build.properties
-  - export TRAVIS_SBT=$(grep sbt.version= project/build.properties | sed -e 's/sbt.version=//g' ) && echo "sbt $TRAVIS_SBT"
+  # - export TRAVIS_SBT=$(grep sbt.version= project/build.properties | sed -e 's/sbt.version=//g' ) && echo "sbt $TRAVIS_SBT"
+  # use 1.2.8 until 1.3.0 installer is out
+  - export TRAVIS_SBT=1.2.8
   - sdk install sbt $TRAVIS_SBT
   # override Travis CI's SBT_OPTS
   - unset SBT_OPTS
diff --git a/bin/fixpreloaded.sh b/bin/fixpreloaded.sh
new file mode 100755
index 000000000..ac57c3596
--- /dev/null
+++ b/bin/fixpreloaded.sh
@@ -0,0 +1,17 @@
+#!/bin/bash
+
+rm -rf $HOME/.sdkman/candidates/sbt/current/lib/local-preloaded/org.scala-lang.modules/scala-parser-combinators_2.12/1.0.4
+rm -rf $HOME/.sdkman/candidates/sbt/current/lib/local-preloaded/org.scala-lang.modules/scala-parser-combinators_2.12/1.0.5
+rm -rf $HOME/.sdkman/candidates/sbt/current/lib/local-preloaded/org.scala-lang.modules/scala-xml_2.12/1.0.6
+rm -rf $HOME/.sdkman/candidates/sbt/current/lib/local-preloaded/com.typesafe/config/1.2.0
+rm -rf $HOME/.sdkman/candidates/sbt/current/lib/local-preloaded/com.typesafe/ssl-config-core_2.12/0.2.2
+rm -rf $HOME/.sdkman/candidates/sbt/current/lib/local-preloaded/com.google.protobuf/protobuf-java/3.3.1
+rm -rf $HOME/.sdkman/candidates/sbt/current/lib/local-preloaded/org.scala-lang/scala-compiler/2.12.6
+
+rm -rf $HOME/.sbt/preloaded/org.scala-lang.modules/scala-parser-combinators_2.12/1.0.4
+rm -rf $HOME/.sbt/preloaded/org.scala-lang.modules/scala-parser-combinators_2.12/1.0.5
+rm -rf $HOME/.sbt/preloaded/org.scala-lang.modules/scala-xml_2.12/1.0.6
+rm -rf $HOME/.sbt/preloaded/com.typesafe/config/1.2.0
+rm -rf $HOME/.sbt/preloaded/com.typesafe/ssl-config-core_2.12/0.2.2
+rm -rf $HOME/.sbt/preloaded/com.google.protobuf/protobuf-java/3.3.1
+rm -rf $HOME/.sbt/preloaded/org.scala-lang/scala-compiler/2.12.6
diff --git a/build.sbt b/build.sbt
index 4b71318ee..b5f6d6d4c 100644
--- a/build.sbt
+++ b/build.sbt
@@ -7,6 +7,8 @@ val _ = {
   sys.props += ("line.separator" -> "\n")
 }
 
+ThisBuild / Test / classLoaderLayeringStrategy := ClassLoaderLayeringStrategy.Flat
+
 def commonSettings: Seq[Setting[_]] = Def.settings(
   scalaVersion := scala212,
   // publishArtifact in packageDoc := false,
diff --git a/project/build.properties b/project/build.properties
index c0bab0494..c59667ce9 100644
--- a/project/build.properties
+++ b/project/build.properties
@@ -1 +1 @@
-sbt.version=1.2.8
+sbt.version=1.3.0-M3