diff --git a/Changelog.md b/Changelog.md
index bd78606..a5ea561 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -1,5 +1,28 @@
 # Changelog
 
+## Master
+
+- Generate Argument Interfaces in `@gql2ts/from-schema` [#148](https://github.com/avantcredit/gql2ts/pull/148)
+
+For example:
+
+```graphql
+type Query {
+  test(arg1: String, arg2: Boolean): String
+}
+```
+
+will output
+
+```typescript
+interface ITestOnQueryArguments {
+  arg1: string;
+  arg2: boolean;
+}
+```
+
+- Only warn about prettier once in `@gql2ts/language-typescript` [#147](https://github.com/avantcredit/gql2ts/pull/147)
+
 ## 1.4.3
 
 - Fix 1.4.2 release
diff --git a/__tests__/__snapshots__/from-schema-test.ts.snap b/__tests__/__snapshots__/from-schema-test.ts.snap
index c619cd1..a123dbc 100644
--- a/__tests__/__snapshots__/from-schema-test.ts.snap
+++ b/__tests__/__snapshots__/from-schema-test.ts.snap
@@ -38,64 +38,64 @@ exports[`gql2ts Supports older TypeScript versions removes Nullability annotatio
     node: Node;
 }
 interface IAllFilmsOnRootArguments {
-after: string;
-first: number;
-before: string;
-last: number;
+after?: string;
+first?: number;
+before?: string;
+last?: number;
 }
 interface IFilmOnRootArguments {
-id: string;
-filmID: string;
+id?: string;
+filmID?: string;
 }
 interface IAllPeopleOnRootArguments {
-after: string;
-first: number;
-before: string;
-last: number;
+after?: string;
+first?: number;
+before?: string;
+last?: number;
 }
 interface IPersonOnRootArguments {
-id: string;
-personID: string;
+id?: string;
+personID?: string;
 }
 interface IAllPlanetsOnRootArguments {
-after: string;
-first: number;
-before: string;
-last: number;
+after?: string;
+first?: number;
+before?: string;
+last?: number;
 }
 interface IPlanetOnRootArguments {
-id: string;
-planetID: string;
+id?: string;
+planetID?: string;
 }
 interface IAllSpeciesOnRootArguments {
-after: string;
-first: number;
-before: string;
-last: number;
+after?: string;
+first?: number;
+before?: string;
+last?: number;
 }
 interface ISpeciesOnRootArguments {
-id: string;
-speciesID: string;
+id?: string;
+speciesID?: string;
 }
 interface IAllStarshipsOnRootArguments {
-after: string;
-first: number;
-before: string;
-last: number;
+after?: string;
+first?: number;
+before?: string;
+last?: number;
 }
 interface IStarshipOnRootArguments {
-id: string;
-starshipID: string;
+id?: string;
+starshipID?: string;
 }
 interface IAllVehiclesOnRootArguments {
-after: string;
-first: number;
-before: string;
-last: number;
+after?: string;
+first?: number;
+before?: string;
+last?: number;
 }
 interface IVehicleOnRootArguments {
-id: string;
-vehicleID: string;
+id?: string;
+vehicleID?: string;
 }
 interface INodeOnRootArguments {
 /**
@@ -221,34 +221,34 @@ full \\"{ edges { node } }\\" version should be used instead.
     id: string;
 }
 interface ISpeciesConnectionOnFilmArguments {
-after: string;
-first: number;
-before: string;
-last: number;
+after?: string;
+first?: number;
+before?: string;
+last?: number;
 }
 interface IStarshipConnectionOnFilmArguments {
-after: string;
-first: number;
-before: string;
-last: number;
+after?: string;
+first?: number;
+before?: string;
+last?: number;
 }
 interface IVehicleConnectionOnFilmArguments {
-after: string;
-first: number;
-before: string;
-last: number;
+after?: string;
+first?: number;
+before?: string;
+last?: number;
 }
 interface ICharacterConnectionOnFilmArguments {
-after: string;
-first: number;
-before: string;
-last: number;
+after?: string;
+first?: number;
+before?: string;
+last?: number;
 }
 interface IPlanetConnectionOnFilmArguments {
-after: string;
-first: number;
-before: string;
-last: number;
+after?: string;
+first?: number;
+before?: string;
+last?: number;
 }
 
   /**
@@ -377,16 +377,16 @@ have skin.
     id: string;
 }
 interface IPersonConnectionOnSpeciesArguments {
-after: string;
-first: number;
-before: string;
-last: number;
+after?: string;
+first?: number;
+before?: string;
+last?: number;
 }
 interface IFilmConnectionOnSpeciesArguments {
-after: string;
-first: number;
-before: string;
-last: number;
+after?: string;
+first?: number;
+before?: string;
+last?: number;
 }
 
   /**
@@ -451,16 +451,16 @@ of water.
     id: string;
 }
 interface IResidentConnectionOnPlanetArguments {
-after: string;
-first: number;
-before: string;
-last: number;
+after?: string;
+first?: number;
+before?: string;
+last?: number;
 }
 interface IFilmConnectionOnPlanetArguments {
-after: string;
-first: number;
-before: string;
-last: number;
+after?: string;
+first?: number;
+before?: string;
+last?: number;
 }
 
   /**
@@ -576,22 +576,22 @@ person does not have hair.
     id: string;
 }
 interface IFilmConnectionOnPersonArguments {
-after: string;
-first: number;
-before: string;
-last: number;
+after?: string;
+first?: number;
+before?: string;
+last?: number;
 }
 interface IStarshipConnectionOnPersonArguments {
-after: string;
-first: number;
-before: string;
-last: number;
+after?: string;
+first?: number;
+before?: string;
+last?: number;
 }
 interface IVehicleConnectionOnPersonArguments {
-after: string;
-first: number;
-before: string;
-last: number;
+after?: string;
+first?: number;
+before?: string;
+last?: number;
 }
 
   /**
@@ -767,16 +767,16 @@ entire crew without having to resupply.
     id: string;
 }
 interface IPilotConnectionOnStarshipArguments {
-after: string;
-first: number;
-before: string;
-last: number;
+after?: string;
+first?: number;
+before?: string;
+last?: number;
 }
 interface IFilmConnectionOnStarshipArguments {
-after: string;
-first: number;
-before: string;
-last: number;
+after?: string;
+first?: number;
+before?: string;
+last?: number;
 }
 
   /**
@@ -985,16 +985,16 @@ entire crew without having to resupply.
     id: string;
 }
 interface IPilotConnectionOnVehicleArguments {
-after: string;
-first: number;
-before: string;
-last: number;
+after?: string;
+first?: number;
+before?: string;
+last?: number;
 }
 interface IFilmConnectionOnVehicleArguments {
-after: string;
-first: number;
-before: string;
-last: number;
+after?: string;
+first?: number;
+before?: string;
+last?: number;
 }
 
   /**
diff --git a/packages/from-schema/src/index.ts b/packages/from-schema/src/index.ts
index ee48d84..3f9c4b3 100644
--- a/packages/from-schema/src/index.ts
+++ b/packages/from-schema/src/index.ts
@@ -100,7 +100,7 @@ const run: (schemaInput: GraphQLSchema, optionsInput: IInternalOptions) => strin
   }
 
   function isInputField (field: GraphQLField<any, any> | GraphQLInputField): field is GraphQLInputField {
-    return !!field.astNode && field.astNode.kind === 'InputValueDefinition';
+    return (!!field.astNode && field.astNode.kind === 'InputValueDefinition') || !({}).hasOwnProperty.call(field, 'args');
   }
 
   const buildDocTags: (field: GraphQLField<any, any> | GraphQLInputField) => IJSDocTag[] = field => {
@@ -164,24 +164,29 @@ const run: (schemaInput: GraphQLSchema, optionsInput: IInternalOptions) => strin
   interface IInterfaceMetadata {
     name: string;
     showNullabilityAttribute: boolean;
+    isNonNull: boolean;
   }
 
   type ExtractInterfaceMetadata = (interfaceName: string, supportsNullability: boolean) => IInterfaceMetadata;
-  const extractInterfaceMetadata: ExtractInterfaceMetadata = (interfaceName, supportsNullability) => ({
-    name: interfaceName.replace(/\!/g, ''),
-    showNullabilityAttribute: !interfaceName.includes('!') && supportsNullability
-  });
+  const extractInterfaceMetadata: ExtractInterfaceMetadata = (interfaceName, supportsNullability) => {
+    const isNonNull: boolean = interfaceName.includes('!');
+    return {
+      isNonNull,
+      name: interfaceName.replace(/\!/g, ''),
+      showNullabilityAttribute: !isNonNull && supportsNullability
+    };
+  };
 
   type FieldToDefinition = (field: GraphQLField<any, any> | GraphQLInputField, isInput: boolean, supportsNullability: boolean) => string;
   const fieldToDefinition: FieldToDefinition = (field, isInput, supportsNullability) => {
-    const { name, showNullabilityAttribute } = extractInterfaceMetadata(
+    const { name, showNullabilityAttribute, isNonNull } = extractInterfaceMetadata(
       resolveInterfaceName(field.type),
       supportsNullability
     );
 
     return formatInput(
       field.name,
-      isInput && showNullabilityAttribute,
+      isInput && !isNonNull,
       printType(name, !showNullabilityAttribute)
     );
   };
@@ -189,14 +194,14 @@ const run: (schemaInput: GraphQLSchema, optionsInput: IInternalOptions) => strin
   type ArgumentToDefinition = (arg: GraphQLArgument, supportsNullability: boolean) => string;
 
   const generateArgumentDeclaration: ArgumentToDefinition = (arg, supportsNullability) => {
-    const { name, showNullabilityAttribute } = extractInterfaceMetadata(
+    const { name, isNonNull, showNullabilityAttribute } = extractInterfaceMetadata(
       resolveInterfaceName(arg.type),
       supportsNullability
     );
 
     return [
       generateDescription(arg.description, buildDocTags(arg)),
-      formatInput(arg.name, showNullabilityAttribute, printType(name, !showNullabilityAttribute))
+      formatInput(arg.name, !isNonNull, printType(name, !showNullabilityAttribute))
     ].filter(Boolean).join('\n');
   };
 
@@ -207,7 +212,7 @@ const run: (schemaInput: GraphQLSchema, optionsInput: IInternalOptions) => strin
   ) => string | null;
 
   const generateArgumentsDeclaration: ArgumentsToDefinition = (field, parentName, supportsNullability) => {
-    if (isInputField(field) || !field.args.length) {
+    if (isInputField(field) || !field.args || !field.args.length) {
       return null;
     }
 
diff --git a/yarn.lock b/yarn.lock
index eb24948..862f19c 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3193,9 +3193,9 @@ typedarray@^0.0.6:
   version "0.0.6"
   resolved "https://registry.yarnpkg.com/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
 
-"typescript@^2.4.1 <2.7.0":
-  version "2.6.2"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-2.6.2.tgz#3c5b6fd7f6de0914269027f03c0946758f7673a4"
+typescript@^2.4.1:
+  version "2.7.2"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-2.7.2.tgz#2d615a1ef4aee4f574425cdff7026edf81919836"
 
 uglify-js@^2.6:
   version "2.8.29"