diff --git a/go.mod b/go.mod
index 9d79bd2..e6dd2a3 100644
--- a/go.mod
+++ b/go.mod
@@ -15,7 +15,7 @@ require (
 )
 
 require (
-	github.com/antchfx/xpath v1.3.0 // indirect
+	github.com/antchfx/xpath v1.3.1 // indirect
 	github.com/fatih/color v1.17.0 // indirect
 	github.com/go-logfmt/logfmt v0.6.0 // indirect
 	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
diff --git a/go.sum b/go.sum
index 30118df..fabdd47 100644
--- a/go.sum
+++ b/go.sum
@@ -1,7 +1,8 @@
 github.com/antchfx/xmlquery v1.4.0 h1:xg2HkfcRK2TeTbdb0m1jxCYnvsPaGY/oeZWTGqX/0hA=
 github.com/antchfx/xmlquery v1.4.0/go.mod h1:Ax2aeaeDjfIw3CwXKDQ0GkwZ6QlxoChlIBP+mGnDFjI=
-github.com/antchfx/xpath v1.3.0 h1:nTMlzGAK3IJ0bPpME2urTuFL76o4A96iYvoKFHRXJgc=
 github.com/antchfx/xpath v1.3.0/go.mod h1:i54GszH55fYfBmoZXapTHN8T8tkcHfRgLyVwwqzXNcs=
+github.com/antchfx/xpath v1.3.1 h1:PNbFuUqHwWl0xRjvUPjJ95Agbmdj2uzzIwmQKgu4oCk=
+github.com/antchfx/xpath v1.3.1/go.mod h1:i54GszH55fYfBmoZXapTHN8T8tkcHfRgLyVwwqzXNcs=
 github.com/apex/log v1.9.0 h1:FHtw/xuaM8AgmvDDTI9fiwoAL25Sq2cxojnZICUU8l0=
 github.com/apex/log v1.9.0/go.mod h1:m82fZlWIuiWzWP04XCTXmnX0xRkYYbCdYn8jbJeLBEA=
 github.com/apex/logs v1.0.0/go.mod h1:XzxuLZ5myVHDy9SAmYpamKKRNApGj54PfYLcFrXqDwo=
diff --git a/vendor/github.com/antchfx/xpath/build.go b/vendor/github.com/antchfx/xpath/build.go
index e079e96..44f87d8 100644
--- a/vendor/github.com/antchfx/xpath/build.go
+++ b/vendor/github.com/antchfx/xpath/build.go
@@ -665,7 +665,7 @@ func (b *builder) processOperator(root *operatorNode, props *builderProp) (query
 	var qyOutput query
 	switch root.Op {
 	case "+", "-", "*", "div", "mod": // Numeric operator
-		var exprFunc func(interface{}, interface{}) interface{}
+		var exprFunc func(iterator, interface{}, interface{}) interface{}
 		switch root.Op {
 		case "+":
 			exprFunc = plusFunc
diff --git a/vendor/github.com/antchfx/xpath/func.go b/vendor/github.com/antchfx/xpath/func.go
index 65386f0..a5e88ba 100644
--- a/vendor/github.com/antchfx/xpath/func.go
+++ b/vendor/github.com/antchfx/xpath/func.go
@@ -113,7 +113,7 @@ func asNumber(t iterator, o interface{}) float64 {
 	case query:
 		node := typ.Select(t)
 		if node == nil {
-			return float64(0)
+			return math.NaN()
 		}
 		if v, err := strconv.ParseFloat(node.Value(), 64); err == nil {
 			return v
diff --git a/vendor/github.com/antchfx/xpath/operator.go b/vendor/github.com/antchfx/xpath/operator.go
index 12aadc1..2820152 100644
--- a/vendor/github.com/antchfx/xpath/operator.go
+++ b/vendor/github.com/antchfx/xpath/operator.go
@@ -1,7 +1,6 @@
 package xpath
 
 import (
-	"reflect"
 	"strconv"
 )
 
@@ -247,44 +246,43 @@ var orFunc = func(t iterator, m, n interface{}) interface{} {
 	return logicalFuncs[t1][t2](t, "or", m, n)
 }
 
-func numericExpr(m, n interface{}, cb func(float64, float64) float64) float64 {
-	typ := reflect.TypeOf(float64(0))
-	a := reflect.ValueOf(m).Convert(typ)
-	b := reflect.ValueOf(n).Convert(typ)
-	return cb(a.Float(), b.Float())
+func numericExpr(t iterator, m, n interface{}, cb func(float64, float64) float64) float64 {
+	a := asNumber(t, m)
+	b := asNumber(t, n)
+	return cb(a, b)
 }
 
 // plusFunc is an `+` operator.
-var plusFunc = func(m, n interface{}) interface{} {
-	return numericExpr(m, n, func(a, b float64) float64 {
+var plusFunc = func(t iterator, m, n interface{}) interface{} {
+	return numericExpr(t, m, n, func(a, b float64) float64 {
 		return a + b
 	})
 }
 
 // minusFunc is an `-` operator.
-var minusFunc = func(m, n interface{}) interface{} {
-	return numericExpr(m, n, func(a, b float64) float64 {
+var minusFunc = func(t iterator, m, n interface{}) interface{} {
+	return numericExpr(t, m, n, func(a, b float64) float64 {
 		return a - b
 	})
 }
 
 // mulFunc is an `*` operator.
-var mulFunc = func(m, n interface{}) interface{} {
-	return numericExpr(m, n, func(a, b float64) float64 {
+var mulFunc = func(t iterator, m, n interface{}) interface{} {
+	return numericExpr(t, m, n, func(a, b float64) float64 {
 		return a * b
 	})
 }
 
 // divFunc is an `DIV` operator.
-var divFunc = func(m, n interface{}) interface{} {
-	return numericExpr(m, n, func(a, b float64) float64 {
+var divFunc = func(t iterator, m, n interface{}) interface{} {
+	return numericExpr(t, m, n, func(a, b float64) float64 {
 		return a / b
 	})
 }
 
 // modFunc is an 'MOD' operator.
-var modFunc = func(m, n interface{}) interface{} {
-	return numericExpr(m, n, func(a, b float64) float64 {
+var modFunc = func(t iterator, m, n interface{}) interface{} {
+	return numericExpr(t, m, n, func(a, b float64) float64 {
 		return float64(int(a) % int(b))
 	})
 }
diff --git a/vendor/github.com/antchfx/xpath/query.go b/vendor/github.com/antchfx/xpath/query.go
index fe6f488..a4d1dce 100644
--- a/vendor/github.com/antchfx/xpath/query.go
+++ b/vendor/github.com/antchfx/xpath/query.go
@@ -999,7 +999,7 @@ func (l *logicalQuery) Properties() queryProp {
 type numericQuery struct {
 	Left, Right query
 
-	Do func(interface{}, interface{}) interface{}
+	Do func(iterator, interface{}, interface{}) interface{}
 }
 
 func (n *numericQuery) Select(t iterator) NodeNavigator {
@@ -1009,7 +1009,7 @@ func (n *numericQuery) Select(t iterator) NodeNavigator {
 func (n *numericQuery) Evaluate(t iterator) interface{} {
 	m := n.Left.Evaluate(t)
 	k := n.Right.Evaluate(t)
-	return n.Do(m, k)
+	return n.Do(t, m, k)
 }
 
 func (n *numericQuery) Clone() query {
diff --git a/vendor/github.com/antchfx/xpath/xpath.go b/vendor/github.com/antchfx/xpath/xpath.go
index aa27370..04bbe8d 100644
--- a/vendor/github.com/antchfx/xpath/xpath.go
+++ b/vendor/github.com/antchfx/xpath/xpath.go
@@ -74,7 +74,6 @@ type NodeNavigator interface {
 type NodeIterator struct {
 	node  NodeNavigator
 	query query
-	table map[uint64]bool
 }
 
 // Current returns current node which matched.
@@ -84,22 +83,14 @@ func (t *NodeIterator) Current() NodeNavigator {
 
 // MoveNext moves Navigator to the next match node.
 func (t *NodeIterator) MoveNext() bool {
-	for {
-		n := t.query.Select(t)
-		if n == nil {
-			return false
-		}
-		if !t.node.MoveTo(n) {
-			t.node = n.Copy()
-		}
-		// https://github.com/antchfx/xpath/issues/94
-		id := getHashCode(n.Copy())
-		if _, ok := t.table[id]; ok {
-			continue
-		}
-		t.table[id] = true
-		return true
+	n := t.query.Select(t)
+	if n == nil {
+		return false
 	}
+	if !t.node.MoveTo(n) {
+		t.node = n.Copy()
+	}
+	return true
 }
 
 // Select selects a node set using the specified XPath expression.
@@ -130,14 +121,14 @@ func (expr *Expr) Evaluate(root NodeNavigator) interface{} {
 	val := expr.q.Evaluate(iteratorFunc(func() NodeNavigator { return root }))
 	switch val.(type) {
 	case query:
-		return &NodeIterator{query: expr.q.Clone(), node: root, table: make(map[uint64]bool)}
+		return &NodeIterator{query: expr.q.Clone(), node: root}
 	}
 	return val
 }
 
 // Select selects a node set using the specified XPath expression.
 func (expr *Expr) Select(root NodeNavigator) *NodeIterator {
-	return &NodeIterator{query: expr.q.Clone(), node: root, table: make(map[uint64]bool)}
+	return &NodeIterator{query: expr.q.Clone(), node: root}
 }
 
 // String returns XPath expression string.
diff --git a/vendor/modules.txt b/vendor/modules.txt
index ed43433..47b4b4a 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -1,7 +1,7 @@
 # github.com/antchfx/xmlquery v1.4.0
 ## explicit; go 1.14
 github.com/antchfx/xmlquery
-# github.com/antchfx/xpath v1.3.0
+# github.com/antchfx/xpath v1.3.1
 ## explicit; go 1.14
 github.com/antchfx/xpath
 # github.com/apex/log v1.9.0