diff --git a/.scalafmt.conf b/.scalafmt.conf
index c91d0d6..48223e9 100644
--- a/.scalafmt.conf
+++ b/.scalafmt.conf
@@ -1,4 +1,4 @@
-version = 2.7.5
+version = 3.0.0
 
 style = default
 
diff --git a/src/main/scala/sangria/marshalling/ArrayMapBuilder.scala b/src/main/scala/sangria/marshalling/ArrayMapBuilder.scala
index 7b44d49..bd686fe 100644
--- a/src/main/scala/sangria/marshalling/ArrayMapBuilder.scala
+++ b/src/main/scala/sangria/marshalling/ArrayMapBuilder.scala
@@ -4,7 +4,8 @@ import scala.annotation.tailrec
 import scala.collection.immutable.{ListMap, VectorBuilder}
 import scala.collection.mutable.{Set => MutableSet}
 
-/** GraphQL `Map` builder that knows keys in advance and able to preserve an original fields sort order
+/** GraphQL `Map` builder that knows keys in advance and able to preserve an original fields sort
+  * order
   */
 class ArrayMapBuilder[T](keys: Seq[String]) extends Iterable[(String, T)] {
   private val elements = new Array[(String, T)](keys.size)
diff --git a/src/main/scala/sangria/marshalling/InputUnmarshaller.scala b/src/main/scala/sangria/marshalling/InputUnmarshaller.scala
index 067e980..220f979 100644
--- a/src/main/scala/sangria/marshalling/InputUnmarshaller.scala
+++ b/src/main/scala/sangria/marshalling/InputUnmarshaller.scala
@@ -22,10 +22,12 @@ trait InputUnmarshaller[Node] {
   def isEnumNode(node: Node): Boolean
   def isVariableNode(node: Node): Boolean
 
-  /** @return Scalar values are Scala String, Int, Double, Boolean and Enum values defined in the schema
-    *          as well as ast nodes if appropriate.
+  /** @return
+    *   Scalar values are Scala String, Int, Double, Boolean and Enum values defined in the schema
+    *   as well as ast nodes if appropriate.
     *
-    * TODO: find better approach. Ideally the should be only one `getScalarValue` method witch returns normal scala values
+    * TODO: find better approach. Ideally the should be only one `getScalarValue` method witch
+    * returns normal scala values
     */
   def getScalarValue(node: Node): Any
 
@@ -40,7 +42,8 @@ trait InputUnmarshaller[Node] {
     *   - scala.BigInt
     *   - scala.BigDecimal
     *
-    * @return Only normal scala scalar values
+    * @return
+    *   Only normal scala scalar values
     */
   def getScalaScalarValue(node: Node): Any
 
diff --git a/src/main/scala/sangria/marshalling/ResultMarshaller.scala b/src/main/scala/sangria/marshalling/ResultMarshaller.scala
index 6375aaa..21353e7 100644
--- a/src/main/scala/sangria/marshalling/ResultMarshaller.scala
+++ b/src/main/scala/sangria/marshalling/ResultMarshaller.scala
@@ -29,10 +29,13 @@ trait ResultMarshaller {
     *   - scala.BigInt
     *   - scala.BigDecimal
     *
-    * Implementation may also support additional scala types if underlying data format supports them (like Dates, or BLOBs).
+    * Implementation may also support additional scala types if underlying data format supports them
+    * (like Dates, or BLOBs).
     *
-    * @param value coerced scalar value
-    * @return marshaled node
+    * @param value
+    *   coerced scalar value
+    * @return
+    *   marshaled node
     */
   def scalarNode(value: Any, typeName: String, info: Set[ScalarValueInfo]): Node
 
@@ -60,7 +63,8 @@ object ResultMarshaller {
     scalaMarshalling.scalaResultMarshaller
 }
 
-/** Alters the behaviour of the executor and marshals raw (in-scala coerced representation) or scalar values and enums.
+/** Alters the behaviour of the executor and marshals raw (in-scala coerced representation) or
+  * scalar values and enums.
   */
 trait RawResultMarshaller extends ResultMarshaller {
   def rawScalarNode(rawValue: Any): Node