diff --git a/src/core/utils.js b/src/core/utils.js
index 0f247b52..e6af2862 100644
--- a/src/core/utils.js
+++ b/src/core/utils.js
@@ -536,6 +536,13 @@ export const validateMinLength = (val, min) => {
   }
 }
 
+export const validatePattern = (val, rxPattern) => {
+  var patt = new RegExp(rxPattern);
+  if (!patt.test(val)) {
+      return "Value must follow pattern " + rxPattern
+  }
+}
+
 // validation of parameters before execute
 export const validateParam = (param, isXml, isOAS3 = false) => {
   let errors = []
@@ -549,6 +556,8 @@ export const validateParam = (param, isXml, isOAS3 = false) => {
   let format = paramDetails.get("format")
   let maxLength = paramDetails.get("maxLength")
   let minLength = paramDetails.get("minLength")
+  let pattern = paramDetails.get("pattern")
+  
 
   /*
     If the parameter is required OR the parameter has a value (meaning optional, but filled in)
@@ -565,6 +574,11 @@ export const validateParam = (param, isXml, isOAS3 = false) => {
     let numberCheck = type === "number" && !validateNumber(value) // validateNumber returns undefined if the value is a number
     let integerCheck = type === "integer" && !validateInteger(value) // validateInteger returns undefined if the value is an integer
 
+    if (pattern) {
+      let err = validatePattern(value, pattern)
+      if (err) errors.push(err)
+    }
+    
     if (maxLength || maxLength === 0) {
       let err = validateMaxLength(value, maxLength)
       if (err) errors.push(err)
diff --git a/test/core/utils.js b/test/core/utils.js
index dd37a518..19705b66 100644
--- a/test/core/utils.js
+++ b/test/core/utils.js
@@ -3,6 +3,7 @@ import expect from "expect"
 import { fromJS, OrderedMap } from "immutable"
 import {
   mapToList,
+  validatePattern,
   validateMinLength,
   validateMaxLength,
   validateDateTime,
@@ -215,9 +216,9 @@ describe("utils", function() {
       expect(validateFile(1)).toEqual(errorMessage)
       expect(validateFile("string")).toEqual(errorMessage)
     })
-   })
+  })
 
-   describe("validateDateTime", function() {
+  describe("validateDateTime", function() {
     let errorMessage = "Value must be a DateTime"
 
     it("doesn't return for valid dates", function() {
@@ -228,7 +229,7 @@ describe("utils", function() {
       expect(validateDateTime(null)).toEqual(errorMessage)
       expect(validateDateTime("string")).toEqual(errorMessage)
     })
-   })
+  })
 
   describe("validateGuid", function() {
     let errorMessage = "Value must be a Guid"
@@ -242,9 +243,9 @@ describe("utils", function() {
       expect(validateGuid(1)).toEqual(errorMessage)
       expect(validateGuid("string")).toEqual(errorMessage)
     })
-   })
+  })
 
-   describe("validateMaxLength", function() {
+  describe("validateMaxLength", function() {
     let errorMessage = "Value must be less than MaxLength"
 
     it("doesn't return for valid guid", function() {
@@ -257,9 +258,9 @@ describe("utils", function() {
       expect(validateMaxLength("abc", 1)).toEqual(errorMessage)
       expect(validateMaxLength("abc", 2)).toEqual(errorMessage)
     })
-   })
+  })
 
-   describe("validateMinLength", function() {
+  describe("validateMinLength", function() {
     let errorMessage = "Value must be greater than MinLength"
 
     it("doesn't return for valid guid", function() {
@@ -271,7 +272,22 @@ describe("utils", function() {
       expect(validateMinLength("abc", 5)).toEqual(errorMessage)
       expect(validateMinLength("abc", 8)).toEqual(errorMessage)
     })
-   })
+  })
+
+  describe("validatePattern", function() {
+    let rxPattern = "^(red|blue)"
+    let errorMessage = "Value must follow pattern " + rxPattern
+
+    it("doesn't return for a match", function() {
+      expect(validatePattern("red", rxPattern)).toBeFalsy()
+      expect(validatePattern("blue", rxPattern)).toBeFalsy()
+    })
+
+    it("returns a message for invalid pattern'", function() {
+      expect(validatePattern("pink", rxPattern)).toEqual(errorMessage)
+      expect(validatePattern("123", rxPattern)).toEqual(errorMessage)
+    })
+  })
 
   describe("validateParam", function() {
     let param = null