diff --git a/.eslintrc b/.eslintrc
index e271786..82bfa38 100644
--- a/.eslintrc
+++ b/.eslintrc
@@ -19,7 +19,6 @@
     "keyword-spacing": ["warn", {"after": true}],
     "jsx-quotes": ["warn", "prefer-double"],
     "no-extra-boolean-cast": "off",
-    "no-console": 0,
     "no-multi-spaces": "warn",
     "no-spaced-func": "warn",
     "no-unused-vars": "warn",
diff --git a/build/index.js b/build/index.js
index 8872926..ca63015 100644
--- a/build/index.js
+++ b/build/index.js
@@ -195,8 +195,11 @@ var Validation = function () {
     key: 'isFormValid',
     value: function isFormValid(state) {
       var storage = state[this.validationStorageName];
+      if ((typeof state === 'undefined' ? 'undefined' : _typeof(state)) !== 'object') {
+        throw new Error('Invalid state parameter, must be object');
+      }
       if ((typeof storage === 'undefined' ? 'undefined' : _typeof(storage)) !== 'object') {
-        throw new Error('Invalid fieldsMappedToStatuses object, must be object');
+        throw new Error('Invalid storage object, must be object');
       }
 
       var keys = Object.keys(storage);
@@ -219,13 +222,14 @@ var Validation = function () {
     key: 'isFieldValid',
     value: function isFieldValid(state, fieldName) {
       var storage = state[this.validationStorageName];
+      if ((typeof state === 'undefined' ? 'undefined' : _typeof(state)) !== 'object') {
+        throw new Error('Invalid state parameter, must be object');
+      }
       if ((typeof storage === 'undefined' ? 'undefined' : _typeof(storage)) !== 'object') {
         throw new Error('Invalid storage object, must be object');
       }
       var fieldStatuses = storage[fieldName];
       if (!fieldStatuses) {
-        // TODO: how to disable warnings in production
-        console.warn("Attempt to validate field that doesn't exist");
         return false;
       }
 
diff --git a/src/index.js b/src/index.js
index 89f6e20..a0222a8 100644
--- a/src/index.js
+++ b/src/index.js
@@ -208,8 +208,11 @@ class Validation {
 
   isFormValid(state: Object): boolean {
     const storage = state[this.validationStorageName];
+    if (typeof state !== 'object') {
+      throw new Error('Invalid state parameter, must be object');
+    }
     if (typeof storage !== 'object') {
-      throw new Error('Invalid fieldsMappedToStatuses object, must be object');
+      throw new Error('Invalid storage object, must be object');
     }
 
     const keys = Object.keys(storage);
@@ -228,13 +231,14 @@ class Validation {
 
   isFieldValid(state: Object, fieldName: string): boolean {
     const storage = state[this.validationStorageName];
+    if (typeof state !== 'object') {
+      throw new Error('Invalid state parameter, must be object');
+    }
     if (typeof storage !== 'object') {
       throw new Error('Invalid storage object, must be object');
     }
     const fieldStatuses = storage[fieldName];
     if (!fieldStatuses) {
-      // TODO: how to disable warnings in production
-      console.warn("Attempt to validate field that doesn't exist");
       return false;
     }