diff --git a/claims.go b/claims.go
index f0228f0..1133fd4 100644
--- a/claims.go
+++ b/claims.go
@@ -35,18 +35,18 @@ func (c StandardClaims) Valid() error {
 
 	// The claims below are optional, by default, so if they are set to the
 	// default value in Go, let's not fail the verification for them.
-	if c.VerifyExpiresAt(now, false) == false {
+	if !c.VerifyExpiresAt(now, false) {
 		delta := time.Unix(now, 0).Sub(time.Unix(c.ExpiresAt, 0))
 		vErr.Inner = fmt.Errorf("token is expired by %v", delta)
 		vErr.Errors |= ValidationErrorExpired
 	}
 
-	if c.VerifyIssuedAt(now, false) == false {
+	if !c.VerifyIssuedAt(now, false) {
 		vErr.Inner = fmt.Errorf("Token used before issued")
 		vErr.Errors |= ValidationErrorIssuedAt
 	}
 
-	if c.VerifyNotBefore(now, false) == false {
+	if !c.VerifyNotBefore(now, false) {
 		vErr.Inner = fmt.Errorf("token is not valid yet")
 		vErr.Errors |= ValidationErrorNotValidYet
 	}
diff --git a/cmd/jwt/app.go b/cmd/jwt/app.go
index 491f5d2..b364927 100644
--- a/cmd/jwt/app.go
+++ b/cmd/jwt/app.go
@@ -98,7 +98,7 @@ func printJSON(j interface{}) error {
 	var out []byte
 	var err error
 
-	if *flagCompact == false {
+	if !*flagCompact {
 		out, err = json.MarshalIndent(j, "", "    ")
 	} else {
 		out, err = json.Marshal(j)
diff --git a/ecdsa.go b/ecdsa.go
index f977381..d310af1 100644
--- a/ecdsa.go
+++ b/ecdsa.go
@@ -88,11 +88,11 @@ func (m *SigningMethodECDSA) Verify(signingString, signature string, key interfa
 	hasher.Write([]byte(signingString))
 
 	// Verify the signature
-	if verifystatus := ecdsa.Verify(ecdsaKey, hasher.Sum(nil), r, s); verifystatus == true {
+	if verifystatus := ecdsa.Verify(ecdsaKey, hasher.Sum(nil), r, s); verifystatus {
 		return nil
-	} else {
-		return ErrECDSAVerification
 	}
+
+	return ErrECDSAVerification
 }
 
 // Implements the Sign method from SigningMethod
diff --git a/map_claims.go b/map_claims.go
index 291213c..e1d6f3f 100644
--- a/map_claims.go
+++ b/map_claims.go
@@ -27,7 +27,7 @@ func (m MapClaims) VerifyExpiresAt(cmp int64, req bool) bool {
 		v, _ := exp.Int64()
 		return verifyExp(v, cmp, req)
 	}
-	return req == false
+	return !req
 }
 
 // Compares the iat claim against cmp.
@@ -40,7 +40,7 @@ func (m MapClaims) VerifyIssuedAt(cmp int64, req bool) bool {
 		v, _ := iat.Int64()
 		return verifyIat(v, cmp, req)
 	}
-	return req == false
+	return !req
 }
 
 // Compares the iss claim against cmp.
@@ -60,7 +60,7 @@ func (m MapClaims) VerifyNotBefore(cmp int64, req bool) bool {
 		v, _ := nbf.Int64()
 		return verifyNbf(v, cmp, req)
 	}
-	return req == false
+	return !req
 }
 
 // Validates time based claims "exp, iat, nbf".
@@ -71,17 +71,17 @@ func (m MapClaims) Valid() error {
 	vErr := new(ValidationError)
 	now := TimeFunc().Unix()
 
-	if m.VerifyExpiresAt(now, false) == false {
+	if !m.VerifyExpiresAt(now, false) {
 		vErr.Inner = errors.New("Token is expired")
 		vErr.Errors |= ValidationErrorExpired
 	}
 
-	if m.VerifyIssuedAt(now, false) == false {
+	if !m.VerifyIssuedAt(now, false) {
 		vErr.Inner = errors.New("Token used before issued")
 		vErr.Errors |= ValidationErrorIssuedAt
 	}
 
-	if m.VerifyNotBefore(now, false) == false {
+	if !m.VerifyNotBefore(now, false) {
 		vErr.Inner = errors.New("Token is not valid yet")
 		vErr.Errors |= ValidationErrorNotValidYet
 	}