diff --git a/src/formio/validators/minMaxDateValidator.js b/src/formio/validators/minMaxDateValidator.js
index 5d50364a9..65ae2ad2c 100644
--- a/src/formio/validators/minMaxDateValidator.js
+++ b/src/formio/validators/minMaxDateValidator.js
@@ -11,13 +11,13 @@ const validateDateBoundaries = (minBoundary, maxBoundary, value) => {
   const parsedValue = new Date(value);
 
   if (minDate && maxDate) {
-    const isValid = parsedValue >= minDate && parsedValue < maxDate;
+    const isValid = parsedValue >= minDate && parsedValue <= maxDate;
     let errorKeys = isValid ? [] : parsedValue < minDate ? ['minDate'] : ['maxDate'];
     return {isValid, errorKeys};
   }
 
   if (minDate) return {isValid: parsedValue >= minDate, errorKeys: ['minDate']};
-  if (maxDate) return {isValid: parsedValue < maxDate, errorKeys: ['maxDate']};
+  if (maxDate) return {isValid: parsedValue <= maxDate, errorKeys: ['maxDate']};
 };
 
 const MinMaxDateValidator = {