diff --git a/.travis.yml b/.travis.yml
index b2cb0bec..1e2606e7 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,7 +4,7 @@ dist: bionic
 env:
   # matrix expansion for scala versions. change in sync with gradle.properties
   - ORG_GRADLE_PROJECT_scalaVersion=2.11.11
-  - ORG_GRADLE_PROJECT_scalaVersion=2.12.10
+  - ORG_GRADLE_PROJECT_scalaVersion=2.12.12
 
 jdk:
   - openjdk8
diff --git a/build.gradle b/build.gradle
index e501f4ca..143eb253 100644
--- a/build.gradle
+++ b/build.gradle
@@ -63,9 +63,6 @@ allprojects {
         api ("org.scala-lang:scala-library:%scala-version%") {
             force = true
         }
-        api ("org.scala-lang:scala-compiler:%scala-version%") {
-            force = true
-        }
         testRuntimeOnly "org.junit.jupiter:junit-jupiter-engine:${versions.junit5}"
         testRuntimeOnly("org.junit.vintage:junit-vintage-engine:${versions.junit5}") {
             because 'allows JUnit 3 and JUnit 4 tests to run'
diff --git a/gradle.properties b/gradle.properties
index fd5c107f..b3e4fa4a 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,6 +1,6 @@
 # scala cross compilation
 # by default, gradle invocations will use only this version. useful for ide invocations.
-defaultScalaVersions=2.12.10
+defaultScalaVersions=2.12.12
 # if we need to cross-compile and rerun the entire task graph (like in a ci build or publish), run with -PallScalaVersions
 # see https://github.com/ADTRAN/gradle-scala-multiversion-plugin#examples
 
@@ -8,7 +8,7 @@ defaultScalaVersions=2.12.10
 # scalafix rule ExplicitResultTypes only works with 2.12.10 due to compiler interface
 # other versions for cross compilation defined in publish.sh
 # change in sync with .travis.yml
-scalaVersions=2.11.11,2.12.10
+scalaVersions=2.11.11,2.12.12
 
 # during releases, we only want to create 1 repo tag.
 # note that devSnapshot and snapshot tasks won't create repo tags
diff --git a/warp-core-gatling/locking/warp-core-gatling_2.11.lockfile b/warp-core-gatling/locking/warp-core-gatling_2.11.lockfile
index 8752a3cc..4fb38438 100644
--- a/warp-core-gatling/locking/warp-core-gatling_2.11.lockfile
+++ b/warp-core-gatling/locking/warp-core-gatling_2.11.lockfile
@@ -94,11 +94,9 @@ org.opentest4j:opentest4j:1.2.0=compileClasspath,testCompileClasspath
 org.reactivestreams:reactive-streams:1.0.2=compileClasspath,testCompileClasspath
 org.scala-lang.modules:scala-collection-compat_2.11:2.0.0=compileClasspath,testCompileClasspath
 org.scala-lang.modules:scala-java8-compat_2.12:0.9.0=compileClasspath,testCompileClasspath
-org.scala-lang.modules:scala-parser-combinators_2.11:1.0.4=compileClasspath,testCompileClasspath
 org.scala-lang.modules:scala-parser-combinators_2.12:1.1.2=compileClasspath,testCompileClasspath
 org.scala-lang.modules:scala-xml_2.11:1.2.0=compileClasspath,scoverage,testCompileClasspath
 org.scala-lang.modules:scala-xml_2.12:1.2.0=compileClasspath,testCompileClasspath
-org.scala-lang:scala-compiler:2.11.11=compileClasspath,testCompileClasspath
 org.scala-lang:scala-library:2.11.11=compileClasspath,testCompileClasspath
 org.scala-lang:scala-library:2.11.12=scoverage
 org.scala-lang:scala-reflect:2.12.9=compileClasspath,testCompileClasspath
diff --git a/warp-core-gatling/locking/warp-core-gatling_2.12.lockfile b/warp-core-gatling/locking/warp-core-gatling_2.12.lockfile
index 2ff1ef1e..30fdc945 100644
--- a/warp-core-gatling/locking/warp-core-gatling_2.12.lockfile
+++ b/warp-core-gatling/locking/warp-core-gatling_2.12.lockfile
@@ -142,8 +142,9 @@ org.scala-lang.modules:scala-java8-compat_2.12:0.9.1=default,runtimeClasspath,te
 org.scala-lang.modules:scala-parser-combinators_2.12:1.1.2=compileClasspath,default,runtimeClasspath,testCompileClasspath,testRuntimeClasspath,zinc
 org.scala-lang.modules:scala-xml_2.12:1.0.6=zinc
 org.scala-lang.modules:scala-xml_2.12:1.2.0=compileClasspath,default,runtimeClasspath,scoverage,testCompileClasspath,testRuntimeClasspath
-org.scala-lang:scala-compiler:2.12.10=compileClasspath,default,runtimeClasspath,testCompileClasspath,testRuntimeClasspath,zinc
-org.scala-lang:scala-library:2.12.10=compileClasspath,default,runtimeClasspath,scoverage,testCompileClasspath,testRuntimeClasspath,zinc
+org.scala-lang:scala-compiler:2.12.10=zinc
+org.scala-lang:scala-library:2.12.10=scoverage,zinc
+org.scala-lang:scala-library:2.12.12=compileClasspath,default,runtimeClasspath,testCompileClasspath,testRuntimeClasspath
 org.scala-lang:scala-reflect:2.12.10=zinc
 org.scala-lang:scala-reflect:2.12.12=compileClasspath,default,runtimeClasspath,testCompileClasspath,testRuntimeClasspath
 org.scala-sbt:compiler-bridge_2.12:1.3.5=zinc
diff --git a/warp-core/locking/warp-core_2.11.lockfile b/warp-core/locking/warp-core_2.11.lockfile
index d58a5eee..8b91b5ad 100644
--- a/warp-core/locking/warp-core_2.11.lockfile
+++ b/warp-core/locking/warp-core_2.11.lockfile
@@ -80,11 +80,9 @@ org.opentest4j:opentest4j:1.2.0=compileClasspath,default,runtimeClasspath,testCo
 org.reactivestreams:reactive-streams:1.0.2=compileClasspath,default,runtimeClasspath,testCompileClasspath,testRuntimeClasspath
 org.scala-lang.modules:scala-collection-compat_2.11:2.0.0=compileClasspath,default,runtimeClasspath,testCompileClasspath,testRuntimeClasspath
 org.scala-lang.modules:scala-java8-compat_2.11:0.9.1=compileClasspath,default,runtimeClasspath,testCompileClasspath,testRuntimeClasspath
-org.scala-lang.modules:scala-parser-combinators_2.11:1.0.4=compileClasspath,default,runtimeClasspath,testCompileClasspath,testRuntimeClasspath
 org.scala-lang.modules:scala-parser-combinators_2.12:1.1.2=zinc
 org.scala-lang.modules:scala-xml_2.11:1.2.0=compileClasspath,default,runtimeClasspath,scoverage,testCompileClasspath,testRuntimeClasspath
 org.scala-lang.modules:scala-xml_2.12:1.0.6=zinc
-org.scala-lang:scala-compiler:2.11.11=compileClasspath,default,runtimeClasspath,testCompileClasspath,testRuntimeClasspath
 org.scala-lang:scala-compiler:2.12.10=zinc
 org.scala-lang:scala-library:2.11.11=compileClasspath,default,runtimeClasspath,testCompileClasspath,testRuntimeClasspath
 org.scala-lang:scala-library:2.11.12=scoverage
diff --git a/warp-core/locking/warp-core_2.12.lockfile b/warp-core/locking/warp-core_2.12.lockfile
index 0a9aa2b3..a2df94f6 100644
--- a/warp-core/locking/warp-core_2.12.lockfile
+++ b/warp-core/locking/warp-core_2.12.lockfile
@@ -83,8 +83,9 @@ org.scala-lang.modules:scala-java8-compat_2.12:0.9.1=compileClasspath,default,ru
 org.scala-lang.modules:scala-parser-combinators_2.12:1.1.2=zinc
 org.scala-lang.modules:scala-xml_2.12:1.0.6=zinc
 org.scala-lang.modules:scala-xml_2.12:1.2.0=compileClasspath,default,runtimeClasspath,scoverage,testCompileClasspath,testRuntimeClasspath
-org.scala-lang:scala-compiler:2.12.10=compileClasspath,default,runtimeClasspath,testCompileClasspath,testRuntimeClasspath,zinc
-org.scala-lang:scala-library:2.12.10=compileClasspath,default,runtimeClasspath,scoverage,testCompileClasspath,testRuntimeClasspath,zinc
+org.scala-lang:scala-compiler:2.12.10=zinc
+org.scala-lang:scala-library:2.12.10=scoverage,zinc
+org.scala-lang:scala-library:2.12.12=compileClasspath,default,runtimeClasspath,testCompileClasspath,testRuntimeClasspath
 org.scala-lang:scala-reflect:2.12.10=zinc
 org.scala-lang:scala-reflect:2.12.12=compileClasspath,default,runtimeClasspath,testCompileClasspath,testRuntimeClasspath
 org.scala-sbt:compiler-bridge_2.12:1.3.5=zinc