diff --git a/lib/isPostalCode.js b/lib/isPostalCode.js
index 0d9564396..d8c7a48a4 100644
--- a/lib/isPostalCode.js
+++ b/lib/isPostalCode.js
@@ -67,6 +67,7 @@ var patterns = {
   RU: sixDigit,
   SA: fiveDigit,
   SE: /^\d{3}\s?\d{2}$/,
+  SK: /^\d{3}\s?\d{2}$/,
   TW: /^\d{3}(\d{2})?$/,
   US: /^\d{5}(-\d{4})?$/,
   ZA: fourDigit,
diff --git a/src/lib/isPostalCode.js b/src/lib/isPostalCode.js
index cd0e5eeac..b3240f17f 100644
--- a/src/lib/isPostalCode.js
+++ b/src/lib/isPostalCode.js
@@ -38,6 +38,7 @@ const patterns = {
   RU: sixDigit,
   SA: fiveDigit,
   SE: /^\d{3}\s?\d{2}$/,
+  SK: /^\d{3}\s?\d{2}$/,
   TW: /^\d{3}(\d{2})?$/,
   US: /^\d{5}(-\d{4})?$/,
   ZA: fourDigit,