diff --git a/build.gradle b/build.gradle
index 223bc05c6..b1b5c0993 100644
--- a/build.gradle
+++ b/build.gradle
@@ -139,13 +139,16 @@ dependencies {
     implementation 'io.prometheus:simpleclient_log4j2'
 
     implementation("com.squareup.okio:okio:3.4.0") {
-        because('fix vulnerability in transitive dependency <com.squareup.okhttp3:okhttp>')
+        because('fix vulnerability in transitive dependency <com.squareup.okhttp3:okhttp>' +
+                'Note: kotlin:1.9 is transitive dependency since 3.5.0')
     }
     implementation("com.squareup.okhttp3:okhttp:4.11.0") {
-        because('fix vulnerability in transitive dependency <kubernetes-client>')
+        because('fix vulnerability in transitive dependency <kubernetes-client>. ' +
+                'Note: kotlin:1.9 is transitive dependency since 4.12.0')
     }
     implementation('com.squareup.okhttp3:logging-interceptor:4.11.0') {
-        because('fix vulnerability in transitive dependency <kubernetes-client>')
+        because('fix vulnerability in transitive dependency <kubernetes-client>. ' +
+                'Note: kotlin:1.9 is transitive dependency since 4.12.0')
     }
 
     implementation("io.fabric8:kubernetes-client:6.12.1") {
diff --git a/src/test/kotlin/com/exactpro/th2/common/util/TestMultiMapDeserializer.kt b/src/test/kotlin/com/exactpro/th2/common/util/TestMultiMapDeserializer.kt
index 809ecc137..e013fe462 100644
--- a/src/test/kotlin/com/exactpro/th2/common/util/TestMultiMapDeserializer.kt
+++ b/src/test/kotlin/com/exactpro/th2/common/util/TestMultiMapDeserializer.kt
@@ -41,7 +41,7 @@ class TestMultiMapDeserializer {
                     .configure(KotlinFeature.NullToEmptyMap, false)
                     .configure(KotlinFeature.NullIsSameAsDefault, false)
                     .configure(KotlinFeature.SingletonSupport, false)
-                    .configure(KotlinFeature.StrictNullChecks, false)
+                    .configure(KotlinFeature.StrictNullChecks, true)
                     .build()
             )