diff --git a/CHANGELOG.md b/CHANGELOG.md
index 13608618..15c84f9d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,7 @@
 * Fixed new line tracking when parsing block-strings
 * Ast schema builder now considers `additionalTypes` when it validates the type extensions
 * `KnownDirectives` validation now correctly handles type and schema extensions
+* Updated `sangria-marshalling-api` to version 1.0.3 (should be backwards compatible with v1.0.0). 
 
 ## v1.4.0 (2018-02-20)
 
diff --git a/build.sbt b/build.sbt
index 88ebd83e..b4261610 100644
--- a/build.sbt
+++ b/build.sbt
@@ -31,7 +31,7 @@ libraryDependencies ++= Seq(
   "org.sangria-graphql" %% "macro-visit" % "0.1.1",
 
   // Marshalling
-  "org.sangria-graphql" %% "sangria-marshalling-api" % "1.0.2",
+  "org.sangria-graphql" %% "sangria-marshalling-api" % "1.0.3",
 
   // Streaming
   "org.sangria-graphql" %% "sangria-streaming-api" % "1.0.0",
diff --git a/src/main/scala/sangria/execution/ResultResolver.scala b/src/main/scala/sangria/execution/ResultResolver.scala
index cf37ceb8..68de6049 100644
--- a/src/main/scala/sangria/execution/ResultResolver.scala
+++ b/src/main/scala/sangria/execution/ResultResolver.scala
@@ -72,9 +72,9 @@ class ResultResolver(val marshaller: ResultMarshaller, exceptionHandler: Excepti
       case _ ⇒ Nil
     }
 
-  private def createLocation(loc: AstLocation) = marshaller.map(
-    "line" → marshaller.fromInt(loc.line),
-    "column" → marshaller.fromInt(loc.column))
+  private def createLocation(loc: AstLocation) = marshaller.mapNode(Seq(
+    "line" → marshaller.scalarNode(loc.line, "Int", Set.empty),
+    "column" → marshaller.scalarNode(loc.column, "Int", Set.empty)))
 
   private def errorNode(message: String, path: ExecutionPath, positions: List[AstLocation], additionalFields: Seq[(String, marshaller.Node)] = Nil, additionalExtensionFields: Seq[(String, marshaller.Node)] = Nil): marshaller.Node =
     mapNode(
@@ -90,7 +90,7 @@ class ResultResolver(val marshaller: ResultMarshaller, exceptionHandler: Excepti
     })
 
   private def messageFields(message: String): Seq[(String, marshaller.Node)] =
-    Seq("message" → marshaller.fromString(message))
+    Seq("message" → marshaller.scalarNode(message, "String", Set.empty))
 
   private def pathFields(path: ExecutionPath): Seq[(String, marshaller.Node)] =
     if (path.nonEmpty)
diff --git a/src/test/scala/sangria/execution/ExceptionHandlingSpec.scala b/src/test/scala/sangria/execution/ExceptionHandlingSpec.scala
index a34a3c63..9fb1e74e 100644
--- a/src/test/scala/sangria/execution/ExceptionHandlingSpec.scala
+++ b/src/test/scala/sangria/execution/ExceptionHandlingSpec.scala
@@ -6,6 +6,7 @@ import sangria.schema._
 import sangria.macros._
 import sangria.util.{DebugUtil, FutureResultSupport, OutputMatchers, StringMatchers}
 import sangria.validation.{AstNodeLocation, BadValueViolation, BaseViolation, UndefinedFieldViolation}
+import sangria.marshalling.MarshallingUtil._
 
 import scala.concurrent.Future
 import scala.util.{Failure, Success}