diff --git a/src/main/kotlin/ee/carlrobert/codegpt/util/BaseConverter.kt b/src/main/kotlin/ee/carlrobert/codegpt/util/BaseConverter.kt
index cec7fbfb..54e83b8d 100644
--- a/src/main/kotlin/ee/carlrobert/codegpt/util/BaseConverter.kt
+++ b/src/main/kotlin/ee/carlrobert/codegpt/util/BaseConverter.kt
@@ -7,7 +7,7 @@ import com.fasterxml.jackson.datatype.jdk8.Jdk8Module
 import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule
 import com.intellij.util.xmlb.Converter
 
-abstract class BaseConverter<T> protected constructor(private val typeReference: TypeReference<T>) : Converter<T>() {
+abstract class BaseConverter<T : Any> protected constructor(private val typeReference: TypeReference<T>) : Converter<T>() {
   private val objectMapper: ObjectMapper = ObjectMapper()
     .registerModule(Jdk8Module())
     .registerModule(JavaTimeModule())
@@ -20,7 +20,7 @@ abstract class BaseConverter<T> protected constructor(private val typeReference:
     }
   }
 
-  override fun toString(value: T & Any): String? {
+  override fun toString(value: T): String? {
     try {
       return objectMapper.writeValueAsString(value)
     } catch (e: JsonProcessingException) {