diff --git a/claims.go b/claims.go
index 7c2f33b..019f007 100644
--- a/claims.go
+++ b/claims.go
@@ -63,14 +63,14 @@ func (c *StandardClaims) VerifyAudience(cmp string, req bool) bool {
 	return verifyAud([]string{c.Audience}, cmp, req)
 }
 
-// VerifyExpiresAt compares the exp claim against cmp.
-// If required is false, this method will return true if the value matches or is unset
+// VerifyExpiresAt compares the exp claim against cmp (cmp <= exp).
+// If req is false, it will return true, if exp is unset.
 func (c *StandardClaims) VerifyExpiresAt(cmp int64, req bool) bool {
 	return verifyExp(c.ExpiresAt, cmp, req)
 }
 
-// VerifyIssuedAt compares the iat claim against cmp.
-// If required is false, this method will return true if the value matches or is unset
+// VerifyIssuedAt compares the iat claim against cmp (cmp >= iat).
+// If req is false, it will return true, if iat is unset.
 func (c *StandardClaims) VerifyIssuedAt(cmp int64, req bool) bool {
 	return verifyIat(c.IssuedAt, cmp, req)
 }
@@ -81,8 +81,8 @@ func (c *StandardClaims) VerifyIssuer(cmp string, req bool) bool {
 	return verifyIss(c.Issuer, cmp, req)
 }
 
-// VerifyNotBefore compares the nbf claim against cmp.
-// If required is false, this method will return true if the value matches or is unset
+// VerifyNotBefore compares the nbf claim against cmp (cmp >= nbf).
+// If req is false, it will return true, if nbf is unset.
 func (c *StandardClaims) VerifyNotBefore(cmp int64, req bool) bool {
 	return verifyNbf(c.NotBefore, cmp, req)
 }
diff --git a/map_claims.go b/map_claims.go
index 7e00e75..c058d41 100644
--- a/map_claims.go
+++ b/map_claims.go
@@ -31,8 +31,8 @@ func (m MapClaims) VerifyAudience(cmp string, req bool) bool {
 	return verifyAud(aud, cmp, req)
 }
 
-// VerifyExpiresAt compares the exp claim against cmp.
-// If required is false, this method will return true if the value matches or is unset
+// VerifyExpiresAt compares the exp claim against cmp (cmp <= exp).
+// If req is false, it will return true, if exp is unset.
 func (m MapClaims) VerifyExpiresAt(cmp int64, req bool) bool {
 	exp, ok := m["exp"]
 	if !ok {
@@ -48,8 +48,8 @@ func (m MapClaims) VerifyExpiresAt(cmp int64, req bool) bool {
 	return false
 }
 
-// VerifyIssuedAt compares the iat claim against cmp.
-// If required is false, this method will return true if the value matches or is unset
+// VerifyIssuedAt compares the exp claim against cmp (cmp >= iat).
+// If req is false, it will return true, if iat is unset.
 func (m MapClaims) VerifyIssuedAt(cmp int64, req bool) bool {
 	iat, ok := m["iat"]
 	if !ok {
@@ -72,8 +72,8 @@ func (m MapClaims) VerifyIssuer(cmp string, req bool) bool {
 	return verifyIss(iss, cmp, req)
 }
 
-// VerifyNotBefore compares the nbf claim against cmp.
-// If required is false, this method will return true if the value matches or is unset
+// VerifyNotBefore compares the nbf claim against cmp (cmp >= nbf).
+// If req is false, it will return true, if nbf is unset.
 func (m MapClaims) VerifyNotBefore(cmp int64, req bool) bool {
 	nbf, ok := m["nbf"]
 	if !ok {