diff --git a/lib/functions/validations.d.ts b/lib/functions/validations.d.ts
index cad6dfa..807d9fe 100644
--- a/lib/functions/validations.d.ts
+++ b/lib/functions/validations.d.ts
@@ -1,6 +1,6 @@
 import { ValidatorForm } from 'react-form-validator-core';
 export declare function isNotAllBlanks(value: any, minlength: number): boolean;
 export declare function maxNaturalNumber(value: any, maxInt: any): boolean;
-declare function validateEndDate(endValue: any, startValue: any): boolean;
-declare function startDateGreaterThanEndDate(startValue: any, endValue: any): boolean;
+declare function validateEndDate(endValue: string, startValue: string): boolean;
+declare function startDateGreaterThanEndDate(startValue: string, endValue: string): boolean;
 export { startDateGreaterThanEndDate, ValidatorForm, validateEndDate, };
diff --git a/lib/functions/validations.js b/lib/functions/validations.js
index 80bf16a..bacb4af 100644
--- a/lib/functions/validations.js
+++ b/lib/functions/validations.js
@@ -3,8 +3,8 @@ var __importDefault = (this && this.__importDefault) || function (mod) {
     return (mod && mod.__esModule) ? mod : { "default": mod };
 };
 Object.defineProperty(exports, "__esModule", { value: true });
-const difference_in_minutes_1 = __importDefault(require("date-fns/difference_in_minutes"));
-const parse_1 = __importDefault(require("date-fns/parse"));
+const differenceInMinutes_1 = __importDefault(require("date-fns/differenceInMinutes"));
+const parseISO_1 = __importDefault(require("date-fns/parseISO"));
 const react_form_validator_core_1 = require("react-form-validator-core");
 exports.ValidatorForm = react_form_validator_core_1.ValidatorForm;
 const lettersRegex = new RegExp('^(?=.*[a-z])(?=.*[A-Z])');
@@ -27,19 +27,14 @@ exports.maxNaturalNumber = maxNaturalNumber;
 react_form_validator_core_1.ValidatorForm.addValidationRule('isNotAllBlanks', isNotAllBlanks);
 react_form_validator_core_1.ValidatorForm.addValidationRule('maxNaturalNumber', maxNaturalNumber);
 function validateEndDate(endValue, startValue) {
-    const startDate = parse_1.default(startValue);
-    const endDate = parse_1.default(endValue);
-    return (difference_in_minutes_1.default(endDate, startDate) > 0);
+    const startDate = parseISO_1.default(startValue);
+    const endDate = parseISO_1.default(endValue);
+    return (differenceInMinutes_1.default(endDate, startDate) > 0);
 }
 exports.validateEndDate = validateEndDate;
 react_form_validator_core_1.ValidatorForm.addValidationRule('validateEndDate', validateEndDate);
 function startDateGreaterThanEndDate(startValue, endValue) {
-    if (endValue !== null) {
-        const startDate = parse_1.default(startValue);
-        const endDate = parse_1.default(endValue);
-        return (difference_in_minutes_1.default(endDate, startDate) > 0);
-    }
-    return true;
+    return endValue !== null ? validateEndDate(endValue, startValue) : true;
 }
 exports.startDateGreaterThanEndDate = startDateGreaterThanEndDate;
 react_form_validator_core_1.ValidatorForm.addValidationRule('startDateGreaterThanEndDate', startDateGreaterThanEndDate);
diff --git a/lib/functions/validations.js.map b/lib/functions/validations.js.map
index fdf3136..28e2b3f 100644
--- a/lib/functions/validations.js.map
+++ b/lib/functions/validations.js.map
@@ -1 +1 @@
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\ No newline at end of file
+{"version":3,"file":"validations.js","sourceRoot":"","sources":["../../src/functions/validations.ts"],"names":[],"mappings":";;;;;AAAA,uFAA+D;AAC/D,iEAAyC;AACzC,yEAA0D;AA+DtD,wBA/DK,yCAAa,CA+DL;AA7DjB,MAAM,YAAY,GAAG,IAAI,MAAM,CAAC,yBAAyB,CAAC,CAAC;AAC3D,MAAM,WAAW,GAAG,IAAI,MAAM,CAAC,cAAc,CAAC,CAAC;AAC/C,MAAM,oBAAoB,GAAG,IAAI,MAAM,CAAC,uBAAuB,CAAC,CAAC;AACjE,MAAM,UAAU,GAAG,IAAI,MAAM,CAAC,eAAe,CAAC,CAAC;AAC/C,MAAM,YAAY,GAAG,MAAM,CAAC;AAC5B,MAAM,aAAa,GAAG,iFAAiF,CAAC;AAExG,SAAgB,cAAc,CAAC,KAAU,EAAE,SAAiB;IACxD,MAAM,QAAQ,GAAG,KAAK,CAAC,OAAO,CAAC,KAAK,EAAE,EAAE,CAAC,CAAC;IAE1C,OAAO,QAAQ,CAAC,MAAM,IAAI,SAAS,CAAC;AACxC,CAAC;AAJD,wCAIC;AAED,SAAgB,gBAAgB,CAAC,KAAU,EAAE,MAAW;IACpD,MAAM,SAAS,GAAG,CAAE,MAAM,CAAC,KAAK,CAAC,CAAC;IAClC,MAAM,UAAU,GAAG,CAAE,MAAM,CAAC,MAAM,CAAC,CAAC;IAEpC,OAAO,SAAS,IAAI,CAAC,IAAI,SAAS,IAAI,UAAU,CAAC;AACrD,CAAC;AALD,4CAKC;AAED,yCAAa,CAAC,iBAAiB,CAAC,gBAAgB,EAAE,cAAc,CAAC,CAAC;AAElE,yCAAa,CAAC,iBAAiB,CAAC,kBAAkB,EAAE,gBAAgB,CAAC,CAAC;AAEtE,SAAS,eAAe,CAAC,QAAgB,EAAE,UAAkB;IACzD,MAAM,SAAS,GAAG,kBAAQ,CAAC,UAAU,CAAC,CAAC;IACvC,MAAM,OAAO,GAAG,kBAAQ,CAAC,QAAQ,CAAC,CAAC;IACnC,OAAO,CAAC,6BAAmB,CAAC,OAAO,EAAE,SAAS,CAAC,GAAG,CAAC,CAAC,CAAC;AACzD,CAAC;AAkCG,0CAAe;AAhCnB,yCAAa,CAAC,iBAAiB,CAAC,iBAAiB,EAAE,eAAe,CAAC,CAAC;AAEpE,SAAS,2BAA2B,CAAC,UAAkB,EAAE,QAAgB;IACrE,OAAO,QAAQ,KAAK,IAAI,CAAC,CAAC,CAAC,eAAe,CAAC,QAAQ,EAAE,UAAU,CAAC,CAAC,CAAC,CAAC,IAAI,CAAC;AAC5E,CAAC;AA0BG,kEAA2B;AAxB/B,yCAAa,CAAC,iBAAiB,CAAC,6BAA6B,EAAE,2BAA2B,CAAC,CAAC;AAE5F,yCAAa,CAAC,iBAAiB,CAAC,SAAS,EAAE,CAAC,KAAU,EAAE,aAAqB,EAAE,EAAE,CAC7E,CAAC,UAAU,CAAC,IAAI,CAAC,aAAa,CAAC,WAAW,EAAE,CAAC,CAAC,CAAC,CAAC;AAEpD,yCAAa,CAAC,iBAAiB,CAAC,6BAA6B,EAAE,CAAC,KAAa,EAAE,EAAE,CAAC,YAAY,CAAC,IAAI,CAAC,KAAK,CAAC,CAAC,CAAC;AAE5G,yCAAa,CAAC,iBAAiB,CAAC,kBAAkB,EAAE,CAAC,KAAa,EAAE,EAAE,CAAC,WAAW,CAAC,IAAI,CAAC,KAAK,CAAC,CAAC,CAAC;AAEhG,yCAAa,CAAC,iBAAiB,CAAC,4BAA4B,EAAE,CAAC,KAAa,EAAE,EAAE,CAAC,oBAAoB,CAAC,IAAI,CAAC,KAAK,CAAC,CAAC,CAAC;AAEnH,yCAAa,CAAC,iBAAiB,CAAC,iBAAiB,EAAE,CAAC,KAAU,EAAE,aAAkB,EAAE,EAAE,CAAC,KAAK,KAAK,aAAa,CAAC,CAAC;AAEhH,yCAAa,CAAC,iBAAiB,CAAC,kBAAkB,EAC9C,CAAC,KAAU,EAAE,EAAE;IACX,IAAI,CAAC,KAAK,IAAI,KAAK,CAAC,IAAI,EAAE,CAAC,MAAM,KAAK,CAAC,EAAE;QAAE,OAAO,IAAI,CAAC;KAAE;IACzD,MAAM,GAAG,GAAG,KAAK,CAAC,KAAK,CAAC,YAAY,CAAC,CAAC;IACtC,OAAO,GAAG,IAAI,GAAG,CAAC,CAAC,CAAC,CAAC,MAAM,KAAK,CAAC,CAAC;AACtC,CAAC,CACJ,CAAC;AAEF,yCAAa,CAAC,iBAAiB,CAAC,UAAU,EAAE,CAAC,KAAU,EAAE,EAAE,CAAC,KAAK,CAAC,KAAK,CAAC,aAAa,CAAC,CAAC,CAAC"}
\ No newline at end of file
diff --git a/package.json b/package.json
index ca38e8b..f9264c1 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "uno-react",
-  "version": "0.8.1",
+  "version": "0.9.0",
   "description": "Common functions, HOCs and hooks for React.",
   "main": "lib/index.js",
   "scripts": {
@@ -33,7 +33,7 @@
     "@material-ui/icons": "^4.2.1",
     "@material-ui/styles": "^4.3.0",
     "@types/react": "16.9.2",
-    "@types/react-dom": "16.8.5",
+    "@types/react-dom": "16.9.0",
     "parcel-bundler": "^1.12.3",
     "parcel-plugin-clean-easy": "^1.0.2",
     "react": "^16.9.0",
@@ -54,7 +54,7 @@
     "lib"
   ],
   "dependencies": {
-    "date-fns": "^1.30.1",
+    "date-fns": "^2.0.0",
     "react-form-validator-core": "^0.6.4"
   }
 }
diff --git a/src/functions/validations.ts b/src/functions/validations.ts
index d1c9951..b0bd7cd 100644
--- a/src/functions/validations.ts
+++ b/src/functions/validations.ts
@@ -1,5 +1,5 @@
-import differenceInMinutes from 'date-fns/difference_in_minutes';
-import parse from 'date-fns/parse';
+import differenceInMinutes from 'date-fns/differenceInMinutes';
+import parseISO from 'date-fns/parseISO';
 import { ValidatorForm } from 'react-form-validator-core';
 
 const lettersRegex = new RegExp('^(?=.*[a-z])(?=.*[A-Z])');
@@ -26,21 +26,16 @@ ValidatorForm.addValidationRule('isNotAllBlanks', isNotAllBlanks);
 
 ValidatorForm.addValidationRule('maxNaturalNumber', maxNaturalNumber);
 
-function validateEndDate(endValue: any, startValue: any) {
-    const startDate = parse(startValue);
-    const endDate = parse(endValue);
+function validateEndDate(endValue: string, startValue: string) {
+    const startDate = parseISO(startValue);
+    const endDate = parseISO(endValue);
     return (differenceInMinutes(endDate, startDate) > 0);
 }
 
 ValidatorForm.addValidationRule('validateEndDate', validateEndDate);
 
-function startDateGreaterThanEndDate(startValue: any, endValue: any) {
-    if (endValue !== null) {
-        const startDate = parse(startValue);
-        const endDate = parse(endValue);
-        return (differenceInMinutes(endDate, startDate) > 0);
-    }
-    return true;
+function startDateGreaterThanEndDate(startValue: string, endValue: string) {
+    return endValue !== null ? validateEndDate(endValue, startValue) : true;
 }
 
 ValidatorForm.addValidationRule('startDateGreaterThanEndDate', startDateGreaterThanEndDate);