diff --git a/src/openApi/v2/parser/constants.ts b/src/openApi/v2/parser/constants.ts
index 6336efda..d252a416 100644
--- a/src/openApi/v2/parser/constants.ts
+++ b/src/openApi/v2/parser/constants.ts
@@ -17,8 +17,6 @@ export const TYPE_MAPPINGS = new Map<string, PrimaryType>([
     ['boolean', PrimaryType.BOOLEAN],
     ['byte', PrimaryType.NUMBER],
     ['int', PrimaryType.NUMBER],
-    ['int32', PrimaryType.NUMBER],
-    ['int64', PrimaryType.NUMBER],
     ['integer', PrimaryType.NUMBER],
     ['float', PrimaryType.NUMBER],
     ['double', PrimaryType.NUMBER],
diff --git a/src/openApi/v2/parser/getMappedType.spec.ts b/src/openApi/v2/parser/getMappedType.spec.ts
index 46b82d5b..48205d76 100644
--- a/src/openApi/v2/parser/getMappedType.spec.ts
+++ b/src/openApi/v2/parser/getMappedType.spec.ts
@@ -2,8 +2,8 @@ import { getMappedType } from './getMappedType';
 
 describe('getMappedType', () => {
     it('should map types to the basics', () => {
-        expect(getMappedType('File')).toEqual('File');
-        expect(getMappedType('String')).toEqual('string');
+        expect(getMappedType('file')).toEqual('File');
+        expect(getMappedType('string')).toEqual('string');
         expect(getMappedType('date')).toEqual('string');
         expect(getMappedType('date-time')).toEqual('string');
         expect(getMappedType('float')).toEqual('number');
diff --git a/src/openApi/v2/parser/getMappedType.ts b/src/openApi/v2/parser/getMappedType.ts
index 8764d1f0..2b786e20 100644
--- a/src/openApi/v2/parser/getMappedType.ts
+++ b/src/openApi/v2/parser/getMappedType.ts
@@ -4,9 +4,9 @@ import { PrimaryType, TYPE_MAPPINGS } from './constants';
  * Get mapped type for given type to any basic Typescript/Javascript type.
  */
 export function getMappedType(type: string): PrimaryType | undefined {
-    return TYPE_MAPPINGS.get(type.toLowerCase());
+    return TYPE_MAPPINGS.get(type);
 }
 
 export function hasMappedType(type: string): boolean {
-    return TYPE_MAPPINGS.has(type.toLowerCase());
+    return TYPE_MAPPINGS.has(type);
 }
diff --git a/src/openApi/v2/parser/getType.spec.ts b/src/openApi/v2/parser/getType.spec.ts
index b16eaca2..acbeb712 100644
--- a/src/openApi/v2/parser/getType.spec.ts
+++ b/src/openApi/v2/parser/getType.spec.ts
@@ -10,7 +10,7 @@ describe('getType', () => {
     });
 
     it('should convert string', () => {
-        const type = getType('String');
+        const type = getType('string');
         expect(type.type).toEqual('string');
         expect(type.base).toEqual('string');
         expect(type.template).toEqual(null);
@@ -18,7 +18,7 @@ describe('getType', () => {
     });
 
     it('should convert string array', () => {
-        const type = getType('Array[String]');
+        const type = getType('array[string]');
         expect(type.type).toEqual('string[]');
         expect(type.base).toEqual('string');
         expect(type.template).toEqual(null);
@@ -26,7 +26,7 @@ describe('getType', () => {
     });
 
     it('should convert template with primary', () => {
-        const type = getType('#/definitions/Link[String]');
+        const type = getType('#/definitions/Link[string]');
         expect(type.type).toEqual('Link<string>');
         expect(type.base).toEqual('Link');
         expect(type.template).toEqual('string');
diff --git a/src/openApi/v2/parser/isPrimaryType.spec.ts b/src/openApi/v2/parser/isPrimaryType.spec.ts
deleted file mode 100644
index ed3e1774..00000000
--- a/src/openApi/v2/parser/isPrimaryType.spec.ts
+++ /dev/null
@@ -1,14 +0,0 @@
-import { isPrimaryType } from './isPrimaryType';
-
-describe('isPrimaryType', () => {
-    it('should return true for primary types', () => {
-        expect(isPrimaryType('number')).toBeTruthy();
-        expect(isPrimaryType('boolean')).toBeTruthy();
-        expect(isPrimaryType('string')).toBeTruthy();
-        expect(isPrimaryType('any')).toBeTruthy();
-        expect(isPrimaryType('void')).toBeTruthy();
-        expect(isPrimaryType('null')).toBeTruthy();
-        expect(isPrimaryType('Array')).toBeFalsy();
-        expect(isPrimaryType('MyModel')).toBeFalsy();
-    });
-});
diff --git a/src/openApi/v2/parser/isPrimaryType.ts b/src/openApi/v2/parser/isPrimaryType.ts
deleted file mode 100644
index dfb9e778..00000000
--- a/src/openApi/v2/parser/isPrimaryType.ts
+++ /dev/null
@@ -1,19 +0,0 @@
-import { PrimaryType } from './constants';
-
-/**
- * Check if given type is a primary type.
- * @param type
- */
-export function isPrimaryType(type: string): type is PrimaryType {
-    switch (type.toLowerCase()) {
-        case PrimaryType.FILE:
-        case PrimaryType.OBJECT:
-        case PrimaryType.BOOLEAN:
-        case PrimaryType.NUMBER:
-        case PrimaryType.STRING:
-        case PrimaryType.VOID:
-        case PrimaryType.NULL:
-            return true;
-    }
-    return false;
-}
diff --git a/src/openApi/v3/parser/constants.ts b/src/openApi/v3/parser/constants.ts
index 7a8632dd..043cf174 100644
--- a/src/openApi/v3/parser/constants.ts
+++ b/src/openApi/v3/parser/constants.ts
@@ -17,8 +17,6 @@ export const TYPE_MAPPINGS = new Map<string, PrimaryType>([
     ['boolean', PrimaryType.BOOLEAN],
     ['byte', PrimaryType.NUMBER],
     ['int', PrimaryType.NUMBER],
-    ['int32', PrimaryType.NUMBER],
-    ['int64', PrimaryType.NUMBER],
     ['integer', PrimaryType.NUMBER],
     ['float', PrimaryType.NUMBER],
     ['double', PrimaryType.NUMBER],
diff --git a/src/openApi/v3/parser/getMappedType.spec.ts b/src/openApi/v3/parser/getMappedType.spec.ts
index 46b82d5b..48205d76 100644
--- a/src/openApi/v3/parser/getMappedType.spec.ts
+++ b/src/openApi/v3/parser/getMappedType.spec.ts
@@ -2,8 +2,8 @@ import { getMappedType } from './getMappedType';
 
 describe('getMappedType', () => {
     it('should map types to the basics', () => {
-        expect(getMappedType('File')).toEqual('File');
-        expect(getMappedType('String')).toEqual('string');
+        expect(getMappedType('file')).toEqual('File');
+        expect(getMappedType('string')).toEqual('string');
         expect(getMappedType('date')).toEqual('string');
         expect(getMappedType('date-time')).toEqual('string');
         expect(getMappedType('float')).toEqual('number');
diff --git a/src/openApi/v3/parser/getMappedType.ts b/src/openApi/v3/parser/getMappedType.ts
index 8764d1f0..2b786e20 100644
--- a/src/openApi/v3/parser/getMappedType.ts
+++ b/src/openApi/v3/parser/getMappedType.ts
@@ -4,9 +4,9 @@ import { PrimaryType, TYPE_MAPPINGS } from './constants';
  * Get mapped type for given type to any basic Typescript/Javascript type.
  */
 export function getMappedType(type: string): PrimaryType | undefined {
-    return TYPE_MAPPINGS.get(type.toLowerCase());
+    return TYPE_MAPPINGS.get(type);
 }
 
 export function hasMappedType(type: string): boolean {
-    return TYPE_MAPPINGS.has(type.toLowerCase());
+    return TYPE_MAPPINGS.has(type);
 }
diff --git a/src/openApi/v3/parser/getType.spec.ts b/src/openApi/v3/parser/getType.spec.ts
index 9c50cfb2..0984014e 100644
--- a/src/openApi/v3/parser/getType.spec.ts
+++ b/src/openApi/v3/parser/getType.spec.ts
@@ -10,7 +10,7 @@ describe('getType', () => {
     });
 
     it('should convert string', () => {
-        const type = getType('String');
+        const type = getType('string');
         expect(type.type).toEqual('string');
         expect(type.base).toEqual('string');
         expect(type.template).toEqual(null);
@@ -18,7 +18,7 @@ describe('getType', () => {
     });
 
     it('should convert string array', () => {
-        const type = getType('Array[String]');
+        const type = getType('array[string]');
         expect(type.type).toEqual('string[]');
         expect(type.base).toEqual('string');
         expect(type.template).toEqual(null);
@@ -26,7 +26,7 @@ describe('getType', () => {
     });
 
     it('should convert template with primary', () => {
-        const type = getType('#/components/schemas/Link[String]');
+        const type = getType('#/components/schemas/Link[string]');
         expect(type.type).toEqual('Link<string>');
         expect(type.base).toEqual('Link');
         expect(type.template).toEqual('string');
diff --git a/src/openApi/v3/parser/isPrimaryType.spec.ts b/src/openApi/v3/parser/isPrimaryType.spec.ts
deleted file mode 100644
index ed3e1774..00000000
--- a/src/openApi/v3/parser/isPrimaryType.spec.ts
+++ /dev/null
@@ -1,14 +0,0 @@
-import { isPrimaryType } from './isPrimaryType';
-
-describe('isPrimaryType', () => {
-    it('should return true for primary types', () => {
-        expect(isPrimaryType('number')).toBeTruthy();
-        expect(isPrimaryType('boolean')).toBeTruthy();
-        expect(isPrimaryType('string')).toBeTruthy();
-        expect(isPrimaryType('any')).toBeTruthy();
-        expect(isPrimaryType('void')).toBeTruthy();
-        expect(isPrimaryType('null')).toBeTruthy();
-        expect(isPrimaryType('Array')).toBeFalsy();
-        expect(isPrimaryType('MyModel')).toBeFalsy();
-    });
-});
diff --git a/src/openApi/v3/parser/isPrimaryType.ts b/src/openApi/v3/parser/isPrimaryType.ts
deleted file mode 100644
index dfb9e778..00000000
--- a/src/openApi/v3/parser/isPrimaryType.ts
+++ /dev/null
@@ -1,19 +0,0 @@
-import { PrimaryType } from './constants';
-
-/**
- * Check if given type is a primary type.
- * @param type
- */
-export function isPrimaryType(type: string): type is PrimaryType {
-    switch (type.toLowerCase()) {
-        case PrimaryType.FILE:
-        case PrimaryType.OBJECT:
-        case PrimaryType.BOOLEAN:
-        case PrimaryType.NUMBER:
-        case PrimaryType.STRING:
-        case PrimaryType.VOID:
-        case PrimaryType.NULL:
-            return true;
-    }
-    return false;
-}
diff --git a/test/__snapshots__/index.spec.js.snap b/test/__snapshots__/index.spec.js.snap
index 484bfec0..8e8eb9e2 100644
--- a/test/__snapshots__/index.spec.js.snap
+++ b/test/__snapshots__/index.spec.js.snap
@@ -300,6 +300,7 @@ export type { ArrayWithNumbers } from './models/ArrayWithNumbers';
 export type { ArrayWithProperties } from './models/ArrayWithProperties';
 export type { ArrayWithReferences } from './models/ArrayWithReferences';
 export type { ArrayWithStrings } from './models/ArrayWithStrings';
+export type { Date } from './models/Date';
 export type { DictionaryWithArray } from './models/DictionaryWithArray';
 export type { DictionaryWithDictionary } from './models/DictionaryWithDictionary';
 export type { DictionaryWithProperties } from './models/DictionaryWithProperties';
@@ -344,6 +345,7 @@ export { $ArrayWithNumbers } from './schemas/$ArrayWithNumbers';
 export { $ArrayWithProperties } from './schemas/$ArrayWithProperties';
 export { $ArrayWithReferences } from './schemas/$ArrayWithReferences';
 export { $ArrayWithStrings } from './schemas/$ArrayWithStrings';
+export { $Date } from './schemas/$Date';
 export { $DictionaryWithArray } from './schemas/$DictionaryWithArray';
 export { $DictionaryWithDictionary } from './schemas/$DictionaryWithDictionary';
 export { $DictionaryWithProperties } from './schemas/$DictionaryWithProperties';
@@ -466,6 +468,17 @@ exports[`v2 should generate: ./test/generated/v2/models/ArrayWithStrings.ts 1`]
 export type ArrayWithStrings = Array<string>;"
 `;
 
+exports[`v2 should generate: ./test/generated/v2/models/Date.ts 1`] = `
+"/* istanbul ignore file */
+/* tslint:disable */
+/* eslint-disable */
+
+/**
+ * This is a type-only model that defines Date as a string
+ */
+export type Date = string;"
+`;
+
 exports[`v2 should generate: ./test/generated/v2/models/DictionaryWithArray.ts 1`] = `
 "/* istanbul ignore file */
 /* tslint:disable */
@@ -1172,6 +1185,16 @@ export const $ArrayWithStrings = {
 };"
 `;
 
+exports[`v2 should generate: ./test/generated/v2/schemas/$Date.ts 1`] = `
+"/* istanbul ignore file */
+/* tslint:disable */
+/* eslint-disable */
+
+export const $Date = {
+    type: 'string',
+};"
+`;
+
 exports[`v2 should generate: ./test/generated/v2/schemas/$DictionaryWithArray.ts 1`] = `
 "/* istanbul ignore file */
 /* tslint:disable */
@@ -2621,6 +2644,7 @@ export type { ArrayWithNumbers } from './models/ArrayWithNumbers';
 export type { ArrayWithProperties } from './models/ArrayWithProperties';
 export type { ArrayWithReferences } from './models/ArrayWithReferences';
 export type { ArrayWithStrings } from './models/ArrayWithStrings';
+export type { Date } from './models/Date';
 export type { DictionaryWithArray } from './models/DictionaryWithArray';
 export type { DictionaryWithDictionary } from './models/DictionaryWithDictionary';
 export type { DictionaryWithProperties } from './models/DictionaryWithProperties';
@@ -2666,6 +2690,7 @@ export { $ArrayWithNumbers } from './schemas/$ArrayWithNumbers';
 export { $ArrayWithProperties } from './schemas/$ArrayWithProperties';
 export { $ArrayWithReferences } from './schemas/$ArrayWithReferences';
 export { $ArrayWithStrings } from './schemas/$ArrayWithStrings';
+export { $Date } from './schemas/$Date';
 export { $DictionaryWithArray } from './schemas/$DictionaryWithArray';
 export { $DictionaryWithDictionary } from './schemas/$DictionaryWithDictionary';
 export { $DictionaryWithProperties } from './schemas/$DictionaryWithProperties';
@@ -2792,6 +2817,17 @@ exports[`v3 should generate: ./test/generated/v3/models/ArrayWithStrings.ts 1`]
 export type ArrayWithStrings = Array<string>;"
 `;
 
+exports[`v3 should generate: ./test/generated/v3/models/Date.ts 1`] = `
+"/* istanbul ignore file */
+/* tslint:disable */
+/* eslint-disable */
+
+/**
+ * This is a type-only model that defines Date as a string
+ */
+export type Date = string;"
+`;
+
 exports[`v3 should generate: ./test/generated/v3/models/DictionaryWithArray.ts 1`] = `
 "/* istanbul ignore file */
 /* tslint:disable */
@@ -3516,6 +3552,16 @@ export const $ArrayWithStrings = {
 };"
 `;
 
+exports[`v3 should generate: ./test/generated/v3/schemas/$Date.ts 1`] = `
+"/* istanbul ignore file */
+/* tslint:disable */
+/* eslint-disable */
+
+export const $Date = {
+    type: 'string',
+};"
+`;
+
 exports[`v3 should generate: ./test/generated/v3/schemas/$DictionaryWithArray.ts 1`] = `
 "/* istanbul ignore file */
 /* tslint:disable */
diff --git a/test/spec/v2.json b/test/spec/v2.json
index 5649e438..b5b39cdd 100644
--- a/test/spec/v2.json
+++ b/test/spec/v2.json
@@ -705,7 +705,7 @@
         },
         "SimpleFile": {
             "description": "This is a simple file",
-            "type": "File"
+            "type": "file"
         },
         "SimpleReference": {
             "description": "This is a simple reference",
@@ -857,6 +857,10 @@
                 }
             }
         },
+        "Date": {
+            "description": "This is a type-only model that defines Date as a string",
+            "type": "string"
+        },
         "ModelWithInteger": {
             "description": "This is a model with one number property",
             "type": "object",
@@ -1003,7 +1007,7 @@
                 "propWithFile": {
                     "type": "array",
                     "items": {
-                        "type": "File"
+                        "type": "file"
                     }
                 },
                 "propWithNumber": {
diff --git a/test/spec/v3.json b/test/spec/v3.json
index daa47fd0..8e752d0c 100644
--- a/test/spec/v3.json
+++ b/test/spec/v3.json
@@ -869,7 +869,7 @@
                         "in": "formData",
                         "required": true,
                         "schema": {
-                            "type": "File"
+                            "type": "file"
                         }
                     },
                     {
@@ -1185,7 +1185,7 @@
             },
             "SimpleFile": {
                 "description": "This is a simple file",
-                "type": "File"
+                "type": "file"
             },
             "SimpleReference": {
                 "description": "This is a simple reference",
@@ -1338,6 +1338,10 @@
                     }
                 }
             },
+            "Date": {
+                "description": "This is a type-only model that defines Date as a string",
+                "type": "string"
+            },
             "ModelWithInteger": {
                 "description": "This is a model with one number property",
                 "type": "object",
@@ -1465,7 +1469,7 @@
                     "propWithFile": {
                         "type": "array",
                         "items": {
-                            "type": "File"
+                            "type": "file"
                         }
                     },
                     "propWithNumber": {