diff --git a/.idea/artifacts/dist.xml b/.idea/artifacts/dist.xml
index ac99b577e3c..3653034c33a 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/1.3.50-dev-455/8b1ab64efeb4c2030834c9f7c2f09e13e8ef9230/kotlin-stdlib-minimal-for-test-1.3.50-dev-455.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-526/7c531c6c6db03b6ebf0ff0e15027bb6aee5d2452/kotlin-stdlib-minimal-for-test-1.3.50-dev-526.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/1.3.50-dev-455/c1e5eaac0191584f9da494ac8e48626f8463e6a/kotlin-stdlib-common-1.3.50-dev-455.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-455/51e07839d3876992c49979b893067efb9dc41656/kotlin-stdlib-common-1.3.50-dev-455-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-526/7a06077a97c805bc4d99aaa17c8e8accf86bfe7c/kotlin-stdlib-common-1.3.50-dev-526.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-526/784cfd305e170c525b1a6987584dd8bebc4e0e6a/kotlin-stdlib-common-1.3.50-dev-526-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/1.3.50-dev-455/cb005c5615b58cad42814fe0b0ba606289b1dcfa/kotlin-stdlib-js-1.3.50-dev-455.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-526/8a798b744fdbd46a7d93814f0f0b97c664c064d2/kotlin-stdlib-js-1.3.50-dev-526.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/1.3.50-dev-455/28ef2b45c6356183179b6e5e4c354a784aaf734/kotlin-stdlib-1.3.50-dev-455-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-526/21e04af851994238d364653c103df336bf45fd4d/kotlin-stdlib-1.3.50-dev-526-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 1d2635afeb0..1fb47a78108 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/1.3.50-dev-455/4c4aca3d15222a28839dc453a71faf82bf58759d/builtins-1.3.50-dev-455.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-526/7dbbf186f7b89e37e7a8f91cb86db2f50440dcc4/builtins-1.3.50-dev-526.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 f65b5e11121..7e53b000cb3 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-jdk8/1.3.50-dev-455/2aaa856e71dc6ed54091c409f1b8e03131cafef/kotlin-stdlib-jdk8-1.3.50-dev-455.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-455/fee02717bdd24151ea4c5583e1b7dd71974bf5e0/kotlin-stdlib-jdk7-1.3.50-dev-455.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-455/8f0648084f51d32388749224f7a19e012e7085d9/kotlin-stdlib-1.3.50-dev-455.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-455/656242b6f4598651bc3cffebc17da1580a08076a/kotlin-stdlib-jdk7-1.3.50-dev-455-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-455/df2711141ec96ec3d137f6ee8f1f374511e8e023/kotlin-stdlib-jdk8-1.3.50-dev-455-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-455/fad4e283a677c0c3789fbcd4ec57405a13d5bd0f/kotlin-stdlib-js-1.3.50-dev-455-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-455/cb005c5615b58cad42814fe0b0ba606289b1dcfa/kotlin-stdlib-js-1.3.50-dev-455.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-455/28ef2b45c6356183179b6e5e4c354a784aaf734/kotlin-stdlib-1.3.50-dev-455-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-526/d9da4521258618dcc687690f81e7430544098a80/kotlin-stdlib-jdk8-1.3.50-dev-526.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-526/8c795ad16d3e2edd465d97cda4063f906a4ecbaa/kotlin-stdlib-jdk7-1.3.50-dev-526.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-526/2fbb7e5d5a32d0754ee33e8ca38696fa22a3b70b/kotlin-stdlib-1.3.50-dev-526.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-526/7c73dd25222b54224562d17184296dc8450c80cf/kotlin-stdlib-jdk7-1.3.50-dev-526-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-526/e9f538ede7b49a4d60265aa90f907d39993417d9/kotlin-stdlib-jdk8-1.3.50-dev-526-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-526/f171da8782d7f0000142818532b5e49693becb99/kotlin-stdlib-js-1.3.50-dev-526-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-526/8a798b744fdbd46a7d93814f0f0b97c664c064d2/kotlin-stdlib-js-1.3.50-dev-526.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-526/21e04af851994238d364653c103df336bf45fd4d/kotlin-stdlib-1.3.50-dev-526-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 3c55ae27a73..680a525e8c5 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -9,7 +9,7 @@ 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("1.3.50-dev-455", onlySuccessBootstrap = false))
+    kotlinBootstrapFrom(BootstrapOption.TeamCity("1.3.50-dev-526", onlySuccessBootstrap = false))
 
     repositories {
         bootstrapKotlinRepo?.let(::maven)