diff --git a/buildSrc/build.gradle.kts b/buildSrc/build.gradle.kts
index 5093b7930..84d1706d5 100644
--- a/buildSrc/build.gradle.kts
+++ b/buildSrc/build.gradle.kts
@@ -5,5 +5,5 @@ plugins {
 repositories.jcenter()
 
 dependencies {
-    implementation(kotlin("compiler-embeddable", "1.4.10"))
+    implementation(kotlin("compiler-embeddable", "1.4.20"))
 }
diff --git a/buildSrc/src/main/kotlin/kscience/kmath/gsl/codegen/matricesCodegen.kt b/buildSrc/src/main/kotlin/kscience/kmath/gsl/codegen/matricesCodegen.kt
index 81324141c..56a563f84 100644
--- a/buildSrc/src/main/kotlin/kscience/kmath/gsl/codegen/matricesCodegen.kt
+++ b/buildSrc/src/main/kotlin/kscience/kmath/gsl/codegen/matricesCodegen.kt
@@ -57,6 +57,9 @@ private fun KtPsiFactory.createMatrixClass(
     f += createNewLine(2)
 }
 
+/**
+ * Generates matrices source code for kmath-gsl.
+ */
 fun matricesCodegen(outputFile: String, project: Project = createProject()) {
     val f = KtPsiFactory(project, true).run {
         createFile("").also { f ->
diff --git a/buildSrc/src/main/kotlin/kscience/kmath/gsl/codegen/vectorsCodegen.kt b/buildSrc/src/main/kotlin/kscience/kmath/gsl/codegen/vectorsCodegen.kt
index e227dc721..2f4a06475 100644
--- a/buildSrc/src/main/kotlin/kscience/kmath/gsl/codegen/vectorsCodegen.kt
+++ b/buildSrc/src/main/kotlin/kscience/kmath/gsl/codegen/vectorsCodegen.kt
@@ -46,6 +46,9 @@ private fun KtPsiFactory.createVectorClass(
     f += createNewLine(2)
 }
 
+/**
+ * Generates vectors source code for kmath-gsl.
+ */
 fun vectorsCodegen(outputFile: String, project: Project = createProject()) {
     val f = KtPsiFactory(project, true).run {
         createFile("").also { f ->