diff --git a/package.json b/package.json
index 39b812ee..feace089 100644
--- a/package.json
+++ b/package.json
@@ -10,9 +10,10 @@
     "build:tsc": "tsc --sourceMap",
     "build:metadata": "./scripts/get-metadata.js > src/metadata.json",
     "clean": "rm -rf ./dist/ ./doc/ ./.nyc_output",
-    "lint": "eslint --ignore-path .gitignore --ext .ts,.tsx .",
+    "lint": "eslint --ignore-path .gitignore --ext .ts,.tsx . && npm run type-check",
     "lint:fix": "eslint --ignore-path .gitignore --ext .ts,.tsx . --fix",
     "format": "prettier --parser typescript --ignore-path .gitignore --write '**/*.{js,jsx,ts,tsx}'",
+    "type-check": "tsc --noEmit",
     "doc:json": "./scripts/typedoc.js",
     "run": "ts-node",
     "release": "release-it --non-interactive",
diff --git a/src/balancer/OceanPool.ts b/src/balancer/OceanPool.ts
index 68622432..6cb1fbf6 100644
--- a/src/balancer/OceanPool.ts
+++ b/src/balancer/OceanPool.ts
@@ -29,7 +29,7 @@ export class OceanPool extends Pool {
      * @param {String} token  Data Token address
      * @param {String} amount Data Token amount
      * @param {String} weight Data Token weight
-     * @return {any}
+     * @return {String}
      */
   public async createDTPool(
     account: string,
@@ -38,7 +38,7 @@ export class OceanPool extends Pool {
     weight: string,
     fee: string,
     finalize = true
-  ): Promise<any> {
+  ): Promise<string> {
     if (this.oceanAddress == null) {
       console.error('oceanAddress is not defined')
       return null
@@ -90,9 +90,9 @@ export class OceanPool extends Pool {
    * Get Ocean Token balance of a pool
    * @param {String} account
    * @param {String} poolAddress
-   * @return {any}
+   * @return {String}
    */
-  public async getOceanReserve(account: string, poolAddress: string): Promise<any> {
+  public async getOceanReserve(account: string, poolAddress: string): Promise<string> {
     if (this.oceanAddress == null) {
       console.error('oceanAddress is not defined')
       return null
@@ -104,9 +104,9 @@ export class OceanPool extends Pool {
    * Get Data Token balance of a pool
    * @param {String} account
    * @param {String} poolAddress
-   * @return {any}
+   * @return {String}
    */
-  public async getDTReserve(account: string, poolAddress: string): Promise<any> {
+  public async getDTReserve(account: string, poolAddress: string): Promise<string> {
     await this.getDTAddress(account, poolAddress)
     return super.getReserve(account, poolAddress, this.dtAddress)
   }