diff --git a/.editorconfig b/.editorconfig
index be0f4587f3..c96af64a95 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -1,3 +1,5 @@
+root = true
+
 [*]
 charset = utf-8
 end_of_line = lf
@@ -33,6 +35,7 @@ ktlint_standard_chain-method-continuation = disabled
 ktlint_ignore_back_ticked_identifier = true
 ktlint_standard_multiline-expression-wrapping = disabled
 ktlint_standard_when-entry-bracing = disabled
+ktlint_standard_expression-operand-wrapping = disabled
 
 [{*/build/**/*,**/*keywords*/**,**/*.Generated.kt,**/*$Extensions.kt}]
 ktlint = disabled
diff --git a/build.gradle.kts b/build.gradle.kts
index 5ad3461512..0b81e1f39c 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -203,7 +203,7 @@ allprojects {
     afterEvaluate {
         try {
             configure<KtlintExtension> {
-                version = "1.6.0"
+                version = "1.8.0"
                 // rules are set up through .editorconfig
             }
         } catch (_: UnknownDomainObjectException) {
diff --git a/core/src/main/kotlin/org/jetbrains/kotlinx/dataframe/impl/api/toDataFrame.kt b/core/src/main/kotlin/org/jetbrains/kotlinx/dataframe/impl/api/toDataFrame.kt
index a931249358..e45230a32a 100644
--- a/core/src/main/kotlin/org/jetbrains/kotlinx/dataframe/impl/api/toDataFrame.kt
+++ b/core/src/main/kotlin/org/jetbrains/kotlinx/dataframe/impl/api/toDataFrame.kt
@@ -319,9 +319,11 @@ internal fun convertToDataFrame(
         val shouldCreateValueCol = keepSubtree ||
             kClass in preserveClasses ||
             property in preserveProperties ||
-            !kClass.canBeUnfolded &&
-            !fieldKind.shouldBeConvertedToFrameColumn &&
-            !fieldKind.shouldBeConvertedToColumnGroup
+            (
+                !kClass.canBeUnfolded &&
+                    !fieldKind.shouldBeConvertedToFrameColumn &&
+                    !fieldKind.shouldBeConvertedToColumnGroup
+            )
 
         val shouldCreateFrameCol = kClass == DataFrame::class && !nullable
         val shouldCreateColumnGroup = kClass == DataRow::class
diff --git a/core/src/test/kotlin/org/jetbrains/kotlinx/dataframe/io/FastDoubleParserTests.kt b/core/src/test/kotlin/org/jetbrains/kotlinx/dataframe/io/FastDoubleParserTests.kt
index 97dba20b82..f9751edd8f 100644
--- a/core/src/test/kotlin/org/jetbrains/kotlinx/dataframe/io/FastDoubleParserTests.kt
+++ b/core/src/test/kotlin/org/jetbrains/kotlinx/dataframe/io/FastDoubleParserTests.kt
@@ -190,17 +190,17 @@ class FastDoubleParserTests {
                 val parsedByNumberFormatter = formatter.parse(formatted)?.toDouble()
 
                 val parsedString = parser.parseOrNull(formatted)
-                assert(double == parsedString || double.isNaN() && parsedString?.isNaN() == true) {
+                assert(double == parsedString || (double.isNaN() && parsedString?.isNaN() == true)) {
                     "Failed to parse $formatted with locale $locale. Expected $double, got $parsedString. NumberFormat parsed it like: $parsedByNumberFormatter"
                 }
 
                 val parsedCharArray = parser.parseOrNull(formatted.toCharArray())
-                assert(double == parsedCharArray || double.isNaN() && parsedCharArray?.isNaN() == true) {
+                assert(double == parsedCharArray || (double.isNaN() && parsedCharArray?.isNaN() == true)) {
                     "Failed to parse $formatted with locale $locale. Expected $double, got $parsedCharArray. NumberFormat parsed it like: $parsedByNumberFormatter"
                 }
 
                 val parsedByteArray = parser.parseOrNull(formatted.toByteArray())
-                assert(double == parsedByteArray || double.isNaN() && parsedByteArray?.isNaN() == true) {
+                assert(double == parsedByteArray || (double.isNaN() && parsedByteArray?.isNaN() == true)) {
                     "Failed to parse $formatted with locale $locale. Expected $double, got $parsedByteArray. NumberFormat parsed it like: $parsedByNumberFormatter"
                 }
             }
diff --git a/core/src/test/kotlin/org/jetbrains/kotlinx/dataframe/samples/api/TestBase.kt b/core/src/test/kotlin/org/jetbrains/kotlinx/dataframe/samples/api/TestBase.kt
index 174dce04a5..f89f33fdb4 100644
--- a/core/src/test/kotlin/org/jetbrains/kotlinx/dataframe/samples/api/TestBase.kt
+++ b/core/src/test/kotlin/org/jetbrains/kotlinx/dataframe/samples/api/TestBase.kt
@@ -1,5 +1,3 @@
-@file:Suppress("ktlint")
-
 package org.jetbrains.kotlinx.dataframe.samples.api
 
 import io.kotest.matchers.should
@@ -7,6 +5,7 @@ import io.kotest.matchers.shouldBe
 import io.kotest.matchers.shouldNotBe
 import org.jetbrains.kotlinx.dataframe.DataRow
 import org.jetbrains.kotlinx.dataframe.annotations.DataSchema
+import org.jetbrains.kotlinx.dataframe.api.asColumn
 import org.jetbrains.kotlinx.dataframe.api.asColumnGroup
 import org.jetbrains.kotlinx.dataframe.api.cast
 import org.jetbrains.kotlinx.dataframe.api.convert
@@ -16,7 +15,6 @@ import org.jetbrains.kotlinx.dataframe.api.into
 import org.jetbrains.kotlinx.dataframe.api.isValueColumn
 import org.jetbrains.kotlinx.dataframe.api.map
 import org.jetbrains.kotlinx.dataframe.api.print
-import org.jetbrains.kotlinx.dataframe.api.asColumn
 import org.jetbrains.kotlinx.dataframe.api.to
 import org.jetbrains.kotlinx.dataframe.columns.ColumnWithPath
 import org.jetbrains.kotlinx.dataframe.explainer.PluginCallbackProxy
diff --git a/plugins/dataframe-gradle-plugin/src/main/kotlin/org/jetbrains/dataframe/gradle/SchemaGeneratorPlugin.kt b/plugins/dataframe-gradle-plugin/src/main/kotlin/org/jetbrains/dataframe/gradle/SchemaGeneratorPlugin.kt
index 0ca158c041..f2dac2fcf4 100644
--- a/plugins/dataframe-gradle-plugin/src/main/kotlin/org/jetbrains/dataframe/gradle/SchemaGeneratorPlugin.kt
+++ b/plugins/dataframe-gradle-plugin/src/main/kotlin/org/jetbrains/dataframe/gradle/SchemaGeneratorPlugin.kt
@@ -91,7 +91,7 @@ class SchemaGeneratorPlugin : Plugin<Project> {
                 // Configure the right ksp task to be aware of these new sources
                 val kspTaskName = "ksp${sourceSetName.replaceFirstChar { it.uppercase() }}Kotlin"
                 target.tasks.withType(KspTaskJvm::class.java).configureEach {
-                    if (sourceSetName == "main" && name == "kspKotlin" || name == kspTaskName) {
+                    if ((sourceSetName == "main" && name == "kspKotlin") || name == kspTaskName) {
                         source(src)
                     }
                 }
diff --git a/plugins/symbol-processor/src/main/kotlin/org/jetbrains/dataframe/ksp/PropertyRenderer.kt b/plugins/symbol-processor/src/main/kotlin/org/jetbrains/dataframe/ksp/PropertyRenderer.kt
index 42a27c72ea..a59688ad4b 100644
--- a/plugins/symbol-processor/src/main/kotlin/org/jetbrains/dataframe/ksp/PropertyRenderer.kt
+++ b/plugins/symbol-processor/src/main/kotlin/org/jetbrains/dataframe/ksp/PropertyRenderer.kt
@@ -45,8 +45,7 @@ internal fun renderExtensions(
             val type = it.propertyType.resolve()
             val qualifiedTypeReference = getQualifiedTypeReference(type)
             val fieldType = when {
-                qualifiedTypeReference == "kotlin.collections.List" &&
-                    type.singleTypeArgumentIsDataSchema() ||
+                (qualifiedTypeReference == "kotlin.collections.List" && type.singleTypeArgumentIsDataSchema()) ||
                     qualifiedTypeReference == DataFrameNames.DATA_FRAME ->
                     FieldType.FrameFieldType(
                         markerName = type.renderTypeArguments(),