diff --git a/README.md b/README.md
index 2fc353b..142e693 100644
--- a/README.md
+++ b/README.md
@@ -44,3 +44,13 @@ resHeader.Set(headers.LastModified, "Mon, 14 Nov 2016 22:05:47 GMT")
 fresh.IsFresh(reqHeader, resHeader)
 // -> true
 ```
+
+```go
+reqHeader, resHeader := make(http.Header), make(http.Header)
+
+resHeader.Set(headers.IfUnmodifiedSince, "Mon, 14 Nov 2016 22:05:47 GMT")
+reqHeader.Set(headers.LastModified, "Mon, 14 Nov 2016 22:05:49 GMT")
+
+fresh.IsFresh(reqHeader, resHeader)
+// -> true
+```
diff --git a/fresh.go b/fresh.go
index 16edf0e..fa4158e 100644
--- a/fresh.go
+++ b/fresh.go
@@ -9,7 +9,7 @@ import (
 )
 
 // Version is this package's verison
-const Version = "0.3.0"
+const Version = "0.3.1"
 
 // IsFresh check whether cache can be used in this HTTP request
 func IsFresh(reqHeader http.Header, resHeader http.Header) bool {
@@ -67,21 +67,27 @@ func checkEtagMatch(etagsToMatch []string, etag string) bool {
 }
 
 func checkModifedMatch(lastModified, ifModifiedSince string) bool {
-	if lm, err := time.Parse(http.TimeFormat, lastModified); err == nil {
-		if ims, err := time.Parse(http.TimeFormat, ifModifiedSince); err == nil {
-			return lm.Before(ims)
-		}
+	if lm, ims, ok := parseTimePairs(lastModified, ifModifiedSince); ok == true {
+		return lm.Before(ims)
 	}
 
 	return false
 }
 
 func checkUnmodifedMatch(lastModified, ifUnmodifiedSince string) bool {
-	if lm, err := time.Parse(http.TimeFormat, lastModified); err == nil {
-		if ius, err := time.Parse(http.TimeFormat, ifUnmodifiedSince); err == nil {
-			return lm.After(ius)
-		}
+	if lm, ius, ok := parseTimePairs(lastModified, ifUnmodifiedSince); ok == true {
+		return lm.After(ius)
 	}
 
 	return false
 }
+
+func parseTimePairs(s1, s2 string) (t1 time.Time, t2 time.Time, ok bool) {
+	if t1, err := time.Parse(http.TimeFormat, s1); err == nil {
+		if t2, err := time.Parse(http.TimeFormat, s2); err == nil {
+			return t1, t2, true
+		}
+	}
+
+	return t1, t2, false
+}