diff --git a/.idea/artifacts/dist.xml b/.idea/artifacts/dist.xml
index 91152540435..2db8dc870f8 100644
--- a/.idea/artifacts/dist.xml
+++ b/.idea/artifacts/dist.xml
@@ -8,16 +8,16 @@
         </element>
       </element>
       <element id="file-copy" path="$PROJECT_DIR$/build/build.txt" />
-      <element id="file-copy" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-minimal-for-test/1.3.40-dev-2251/4145ea97e69951b7d0b9aa24c90a592bbcc72946/kotlin-stdlib-minimal-for-test-1.3.40-dev-2251.jar" output-file-name="kotlin-stdlib-minimal-for-test.jar" />
+      <element id="file-copy" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-minimal-for-test/1.3.50-dev-2/45d5a1656994023a1b059b59b571c45fe860c795/kotlin-stdlib-minimal-for-test-1.3.50-dev-2.jar" output-file-name="kotlin-stdlib-minimal-for-test.jar" />
       <element id="directory" name="common">
-        <element id="file-copy" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-common/1.3.40-dev-2251/24bdcd80883f6a666d82154b6246dc140bec19a3/kotlin-stdlib-common-1.3.40-dev-2251.jar" output-file-name="kotlin-stdlib-common.jar" />
-        <element id="file-copy" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-common/1.3.40-dev-2251/4f0392a2211ee3d1512f1d01ae98fe2f86448ad2/kotlin-stdlib-common-1.3.40-dev-2251-sources.jar" output-file-name="kotlin-stdlib-common-sources.jar" />
+        <element id="file-copy" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-common/1.3.50-dev-2/a875a2e725e87a22a059d6b01dacf1809c153210/kotlin-stdlib-common-1.3.50-dev-2.jar" output-file-name="kotlin-stdlib-common.jar" />
+        <element id="file-copy" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-common/1.3.50-dev-2/a039d2dedf849e4ae31e99bad4f3f014f819f202/kotlin-stdlib-common-1.3.50-dev-2-sources.jar" output-file-name="kotlin-stdlib-common-sources.jar" />
       </element>
       <element id="directory" name="js">
-        <element id="extracted-dir" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.3.40-dev-2251/65ace589f8f9359ac30790244b1c473297f722d1/kotlin-stdlib-js-1.3.40-dev-2251.jar" path-in-jar="/" />
+        <element id="extracted-dir" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.3.50-dev-2/4da3d285b8c80c0992fb0542e1f19745c5509b1c/kotlin-stdlib-js-1.3.50-dev-2.jar" path-in-jar="/" />
       </element>
       <element id="directory" name="maven">
-        <element id="file-copy" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib/1.3.40-dev-2251/596156dc7a263af8008dc5fd1a6d649d2cfbbfc2/kotlin-stdlib-1.3.40-dev-2251-sources.jar" output-file-name="kotlin-stdlib-sources.jar" />
+        <element id="file-copy" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib/1.3.50-dev-2/2c05b3484ae2b4505697caab9817d34a1086ea3e/kotlin-stdlib-1.3.50-dev-2-sources.jar" output-file-name="kotlin-stdlib-sources.jar" />
       </element>
       <element id="directory" name="kotlinc">
         <element id="artifact" artifact-name="kotlinc" />
diff --git a/.idea/artifacts/kotlin_compiler_jar.xml b/.idea/artifacts/kotlin_compiler_jar.xml
index 8276a929d16..35627cb388d 100644
--- a/.idea/artifacts/kotlin_compiler_jar.xml
+++ b/.idea/artifacts/kotlin_compiler_jar.xml
@@ -8,7 +8,7 @@
         </element>
         <element id="file-copy" path="$PROJECT_DIR$/prepare/compiler/build/tmp/packCompiler/MANIFEST.MF" />
       </element>
-      <element id="extracted-dir" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/builtins/1.3.40-dev-2251/27e044e9fe780181a3c27ba4c78496a4ede00ba8/builtins-1.3.40-dev-2251.jar" path-in-jar="/" />
+      <element id="extracted-dir" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/builtins/1.3.50-dev-2/777cc2967c51bb51f83436cd2439a21611220c81/builtins-1.3.50-dev-2.jar" path-in-jar="/" />
       <element id="extracted-dir" path="$PROJECT_DIR$/dependencies/repo/kotlin.build/ideaIC/191.6707.61/artifacts/lib/asm-all-7.0.1.jar" path-in-jar="/" />
       <element id="extracted-dir" path="$PROJECT_DIR$/dependencies/repo/kotlin.build/ideaIC/191.6707.61/artifacts/lib/guava-25.1-jre.jar" path-in-jar="/" />
       <element id="extracted-dir" path="$PROJECT_DIR$/dependencies/repo/kotlin.build/intellij-core/191.6707.61/artifacts/intellij-core.jar" path-in-jar="/" />
diff --git a/.idea/artifacts/kotlinc.xml b/.idea/artifacts/kotlinc.xml
index ddf2287bdf6..518a3618323 100644
--- a/.idea/artifacts/kotlinc.xml
+++ b/.idea/artifacts/kotlinc.xml
@@ -226,14 +226,14 @@
             <element id="file-copy" path="$PROJECT_DIR$/plugins/android-extensions/android-extensions-compiler/build/tmp/jar/MANIFEST.MF" />
           </element>
         </element>
-        <element id="file-copy" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-jdk8/1.3.40-dev-2251/50d0a0344d092ba91678896e1a6e9cb595191a73/kotlin-stdlib-jdk8-1.3.40-dev-2251.jar" output-file-name="kotlin-stdlib-jdk8.jar" />
-        <element id="file-copy" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-jdk7/1.3.40-dev-2251/255166684fce605986508bff903c78c7da7ee9b2/kotlin-stdlib-jdk7-1.3.40-dev-2251.jar" output-file-name="kotlin-stdlib-jdk7.jar" />
-        <element id="file-copy" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib/1.3.40-dev-2251/cfdbfe7770f01b00c01becb43b8211faada939db/kotlin-stdlib-1.3.40-dev-2251.jar" output-file-name="kotlin-stdlib.jar" />
-        <element id="file-copy" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-jdk7/1.3.40-dev-2251/b318ccc4b22cc2fcf79e0c06af735e97d3dd4eb/kotlin-stdlib-jdk7-1.3.40-dev-2251-sources.jar" output-file-name="kotlin-stdlib-jdk7-sources.jar" />
-        <element id="file-copy" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-jdk8/1.3.40-dev-2251/d0b0fea9f4efc6ee45f807914f050465e1ab746e/kotlin-stdlib-jdk8-1.3.40-dev-2251-sources.jar" output-file-name="kotlin-stdlib-jdk8-sources.jar" />
-        <element id="file-copy" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.3.40-dev-2251/bf54aaefb744930ef20db15ecd532abeca1730da/kotlin-stdlib-js-1.3.40-dev-2251-sources.jar" />
-        <element id="file-copy" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.3.40-dev-2251/65ace589f8f9359ac30790244b1c473297f722d1/kotlin-stdlib-js-1.3.40-dev-2251.jar" output-file-name="kotlin-stdlib-js.jar" />
-        <element id="file-copy" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib/1.3.40-dev-2251/596156dc7a263af8008dc5fd1a6d649d2cfbbfc2/kotlin-stdlib-1.3.40-dev-2251-sources.jar" output-file-name="kotlin-stdlib-sources.jar" />
+        <element id="file-copy" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-jdk8/1.3.50-dev-2/b459ccd831169415f0502b7912939948a7f92914/kotlin-stdlib-jdk8-1.3.50-dev-2.jar" output-file-name="kotlin-stdlib-jdk8.jar" />
+        <element id="file-copy" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-jdk7/1.3.50-dev-2/1560a8de4c55360e21ec0c48b15e502acd8a4852/kotlin-stdlib-jdk7-1.3.50-dev-2.jar" output-file-name="kotlin-stdlib-jdk7.jar" />
+        <element id="file-copy" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib/1.3.50-dev-2/386994392bfa87d9891ce3468734becbcb7e475a/kotlin-stdlib-1.3.50-dev-2.jar" output-file-name="kotlin-stdlib.jar" />
+        <element id="file-copy" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-jdk7/1.3.50-dev-2/56c9b34c78ed2b221ca76431edecdf04fd7e57a5/kotlin-stdlib-jdk7-1.3.50-dev-2-sources.jar" output-file-name="kotlin-stdlib-jdk7-sources.jar" />
+        <element id="file-copy" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-jdk8/1.3.50-dev-2/69be4df2dd9cf03ba536eb08609290bd28e0eac9/kotlin-stdlib-jdk8-1.3.50-dev-2-sources.jar" output-file-name="kotlin-stdlib-jdk8-sources.jar" />
+        <element id="file-copy" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.3.50-dev-2/5d33e88af6a495d766f0fef65f1156fa9977e62f/kotlin-stdlib-js-1.3.50-dev-2-sources.jar" />
+        <element id="file-copy" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.3.50-dev-2/4da3d285b8c80c0992fb0542e1f19745c5509b1c/kotlin-stdlib-js-1.3.50-dev-2.jar" output-file-name="kotlin-stdlib-js.jar" />
+        <element id="file-copy" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib/1.3.50-dev-2/2c05b3484ae2b4505697caab9817d34a1086ea3e/kotlin-stdlib-1.3.50-dev-2-sources.jar" output-file-name="kotlin-stdlib-sources.jar" />
         <element id="artifact" artifact-name="kotlin-compiler.jar" />
         <element id="artifact" artifact-name="kotlin-reflect.jar" />
         <element id="artifact" artifact-name="kotlin-daemon-client.jar" />
diff --git a/build.gradle.kts b/build.gradle.kts
index 2af59c8490a..b656db9f336 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -10,7 +10,7 @@ buildscript {
     extra["defaultSnapshotVersion"] = "1.3-SNAPSHOT"
 
     // when updating please also update JPS artifacts configuration: https://jetbrains.quip.com/zzGUAYSJ6gv3/JPS-Build-update-bootstrap
-    kotlinBootstrapFrom(BootstrapOption.TeamCity("1.3.40-dev-2251", onlySuccessBootstrap = false))
+    kotlinBootstrapFrom(BootstrapOption.TeamCity("1.3.50-dev-2", onlySuccessBootstrap = false))
 
     repositories.withRedirector(project) {
         bootstrapKotlinRepo?.let(::maven)