diff --git a/config/rollup.js b/config/rollup.js
index c1114c5..8449c70 100644
--- a/config/rollup.js
+++ b/config/rollup.js
@@ -35,7 +35,12 @@ export default {
 		}),
 		commonjs({
 			namedExports: {
-				'node_modules/lodash/lodash.js': ['cloneDeep', 'intersection', 'isNil', 'isString'],
+				'node_modules/lodash/lodash.js': [
+					'cloneDeep',
+					'intersection',
+					'isNil',
+					'isString',
+				],
 				'node_modules/noicejs/out/main-bundle.js': ['BaseError'],
 				'node_modules/js-yaml/index.js': [
 					'DEFAULT_SAFE_SCHEMA',
diff --git a/src/config/index.ts b/src/config/index.ts
index c6a319b..9be3fa9 100644
--- a/src/config/index.ts
+++ b/src/config/index.ts
@@ -1,4 +1,4 @@
-import { DEFAULT_SAFE_SCHEMA, safeLoad, Schema } from 'js-yaml';
+import { DEFAULT_SAFE_SCHEMA, Schema } from 'js-yaml';
 import { isNil, isString } from 'lodash';
 import { join } from 'path';
 
@@ -7,6 +7,7 @@ import { includeSchema, includeType } from 'src/config/type/Include';
 import { regexpType } from 'src/config/type/Regexp';
 import { streamType } from 'src/config/type/Stream';
 import { NotFoundError } from 'src/error/NotFoundError';
+import { YamlParser } from 'src/parser/YamlParser';
 import { readFileSync } from 'src/source';
 
 export const CONFIG_ENV = 'SALTY_HOME';
@@ -50,14 +51,13 @@ export function completePaths(name: string, extras: Array<string>): Array<string
 }
 
 export async function loadConfig(name: string, ...extras: Array<string>): Promise<any> {
+  const parser = new YamlParser();
   const paths = completePaths(name, extras);
 
   for (const p of paths) {
     const data = await readConfig(p);
     if (!isNil(data)) {
-      return safeLoad(data, {
-        schema: CONFIG_SCHEMA,
-      });
+      return parser.parse(data);
     }
   }
 
diff --git a/src/index.ts b/src/index.ts
index fd464ea..83c292b 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,8 +1,9 @@
 import { createLogger } from 'bunyan';
-import { safeDump, safeLoad } from 'js-yaml';
+import { safeDump } from 'js-yaml';
 import { detailed, Options } from 'yargs-parser';
 
 import { CONFIG_SCHEMA, loadConfig } from 'src/config';
+import { YamlParser } from 'src/parser/YamlParser';
 import { loadRules, resolveRules } from 'src/rule';
 import { loadSource, writeSource } from 'src/source';
 import { VERSION_INFO } from 'src/version';
@@ -76,13 +77,13 @@ export async function main(argv: Array<string>): Promise<number> {
 
   const rules = await loadRules(args.argv.rules);
   const source = await loadSource(args.argv.source);
-  const data = safeLoad(source, {
-    schema: CONFIG_SCHEMA,
-  });
-  const activeRules = await resolveRules(rules, args.argv as any);
 
-  // run rules
+  const parser = new YamlParser();
+  const data = parser.parse(source);
+
+  const activeRules = await resolveRules(rules, args.argv as any);
   const ctx = new VisitorContext(logger);
+
   switch (args.argv.mode) {
     case 'check':
       for (const rule of activeRules) {
diff --git a/src/parser/YamlParser.ts b/src/parser/YamlParser.ts
new file mode 100644
index 0000000..4834c90
--- /dev/null
+++ b/src/parser/YamlParser.ts
@@ -0,0 +1,12 @@
+import { safeLoad } from 'js-yaml';
+
+import { CONFIG_SCHEMA } from 'src/config';
+import { Parser } from 'src/parser';
+
+export class YamlParser implements Parser {
+  parse(body: string): any {
+    return safeLoad(body, {
+      schema: CONFIG_SCHEMA,
+    });
+  }
+}
\ No newline at end of file
diff --git a/src/parser/index.ts b/src/parser/index.ts
new file mode 100644
index 0000000..85157a7
--- /dev/null
+++ b/src/parser/index.ts
@@ -0,0 +1,3 @@
+export interface Parser {
+  parse(body: string): any;
+}
\ No newline at end of file
diff --git a/src/rule.ts b/src/rule.ts
index 9f3d67e..e9290ae 100644
--- a/src/rule.ts
+++ b/src/rule.ts
@@ -1,12 +1,10 @@
 import * as Ajv from 'ajv';
-import { safeLoad } from 'js-yaml';
 import { JSONPath } from 'jsonpath-plus';
 import { cloneDeep, intersection, isNil } from 'lodash';
 import { LogLevel } from 'noicejs';
 
-import { CONFIG_SCHEMA } from 'src/config';
+import { YamlParser } from 'src/parser/YamlParser';
 import { readFileSync } from 'src/source';
-
 import { Visitor } from 'src/visitor';
 import { VisitorContext } from 'src/visitor/context';
 
@@ -32,6 +30,7 @@ export interface RuleSelector {
 }
 
 export async function loadRules(paths: Array<string>): Promise<Array<Rule>> {
+  const parser = new YamlParser();
   const rules = [];
 
   for (const path of paths) {
@@ -39,10 +38,7 @@ export async function loadRules(paths: Array<string>): Promise<Array<Rule>> {
       encoding: 'utf-8',
     });
 
-    const data = safeLoad(contents, {
-      schema: CONFIG_SCHEMA,
-    });
-
+    const data = parser.parse(contents);
     rules.push(...data.rules.map((data: any) => new Rule(data)));
   }