diff --git a/idea/src/org/jetbrains/kotlin/idea/slicer/InflowSlicer.kt b/idea/src/org/jetbrains/kotlin/idea/slicer/InflowSlicer.kt
index a7528cf8efa..5de9219cb4a 100644
--- a/idea/src/org/jetbrains/kotlin/idea/slicer/InflowSlicer.kt
+++ b/idea/src/org/jetbrains/kotlin/idea/slicer/InflowSlicer.kt
@@ -1,3 +1,8 @@
+/*
+ * Copyright 2010-2020 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
 package org.jetbrains.kotlin.idea.slicer
 
 import com.intellij.psi.PsiCall
diff --git a/idea/src/org/jetbrains/kotlin/idea/slicer/OutflowSlicer.kt b/idea/src/org/jetbrains/kotlin/idea/slicer/OutflowSlicer.kt
index e5562cb6d2c..53f0cbed9a7 100644
--- a/idea/src/org/jetbrains/kotlin/idea/slicer/OutflowSlicer.kt
+++ b/idea/src/org/jetbrains/kotlin/idea/slicer/OutflowSlicer.kt
@@ -1,3 +1,8 @@
+/*
+ * Copyright 2010-2020 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
 package org.jetbrains.kotlin.idea.slicer
 
 import com.intellij.codeInsight.highlighting.ReadWriteAccessDetector
diff --git a/idea/src/org/jetbrains/kotlin/idea/slicer/Slicer.kt b/idea/src/org/jetbrains/kotlin/idea/slicer/Slicer.kt
index 27c10680d95..6bd7f21e36d 100644
--- a/idea/src/org/jetbrains/kotlin/idea/slicer/Slicer.kt
+++ b/idea/src/org/jetbrains/kotlin/idea/slicer/Slicer.kt
@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2019 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Copyright 2010-2020 JetBrains s.r.o. and Kotlin Programming Language contributors.
  * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
  */