diff --git a/go.mod b/go.mod
index ccef1c542..90868c9a3 100644
--- a/go.mod
+++ b/go.mod
@@ -9,7 +9,7 @@ require (
 	github.com/Masterminds/semver v1.5.0 // indirect
 	github.com/Masterminds/sprig v2.22.0+incompatible
 	github.com/Masterminds/squirrel v1.1.1-0.20191017225151-12f2162c8d8d
-	github.com/PaesslerAG/gval v1.0.1
+	github.com/PaesslerAG/gval v1.1.0
 	github.com/PaesslerAG/jsonpath v0.1.1 // indirect
 	github.com/SentimensRG/ctx v0.0.0-20180729130232-0bfd988c655d
 	github.com/crusttech/go-oidc v0.0.0-20180918092017-982855dad3e1
diff --git a/go.sum b/go.sum
index 903520dbd..5f83116e6 100644
--- a/go.sum
+++ b/go.sum
@@ -51,8 +51,8 @@ github.com/Masterminds/squirrel v1.1.1-0.20191017225151-12f2162c8d8d/go.mod h1:y
 github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
 github.com/PaesslerAG/gval v0.1.1/go.mod h1:y/nm5yEyTeX6av0OfKJNp9rBNj2XrGhAf5+v24IBN1I=
 github.com/PaesslerAG/gval v1.0.0/go.mod h1:y/nm5yEyTeX6av0OfKJNp9rBNj2XrGhAf5+v24IBN1I=
-github.com/PaesslerAG/gval v1.0.1 h1:QnCvok0w0Y3uZNxmNmC6GZ0cuBl+jH0tu/rBMT8pso4=
-github.com/PaesslerAG/gval v1.0.1/go.mod h1:y/nm5yEyTeX6av0OfKJNp9rBNj2XrGhAf5+v24IBN1I=
+github.com/PaesslerAG/gval v1.1.0 h1:k3RuxeZDO3eejD4cMPSt+74tUSvTnbGvLx0df4mdwFc=
+github.com/PaesslerAG/gval v1.1.0/go.mod h1:y/nm5yEyTeX6av0OfKJNp9rBNj2XrGhAf5+v24IBN1I=
 github.com/PaesslerAG/jsonpath v0.1.0/go.mod h1:4BzmtoM/PI8fPO4aQGIusjGxGir2BzcV0grWtFzq1Y8=
 github.com/PaesslerAG/jsonpath v0.1.1 h1:c1/AToHQMVsduPAa4Vh6xp2U0evy4t8SWp8imEsylIk=
 github.com/PaesslerAG/jsonpath v0.1.1/go.mod h1:lVboNxFGal/VwW6d9JzIy56bUsYAP6tH/x80vjnCseY=
diff --git a/vendor/github.com/PaesslerAG/gval/.travis.yml b/vendor/github.com/PaesslerAG/gval/.travis.yml
index 681fe4668..cd654a469 100644
--- a/vendor/github.com/PaesslerAG/gval/.travis.yml
+++ b/vendor/github.com/PaesslerAG/gval/.travis.yml
@@ -6,7 +6,7 @@ before_install:
 
 script:
 - go test -bench=. -benchmem -timeout 10m -coverprofile coverage.out
-- $HOME/gopath/bin/goveralls -coverprofile=coverage.out -service=travis-ci -repotoken $COVERALLS_TOKEN
+- $HOME/gopath/bin/goveralls -coverprofile=coverage.out -service=travis-ci -repotoken=$COVERALLS_TOKEN
 - go test -bench=Random -benchtime 5m -timeout 30m -benchmem -coverprofile coverage.out
 
 go: "1.11"
diff --git a/vendor/github.com/PaesslerAG/gval/evaluable.go b/vendor/github.com/PaesslerAG/gval/evaluable.go
index 5238854c3..5da168ec5 100644
--- a/vendor/github.com/PaesslerAG/gval/evaluable.go
+++ b/vendor/github.com/PaesslerAG/gval/evaluable.go
@@ -202,7 +202,7 @@ func (*Parser) callFunc(fun function, args ...Evaluable) Evaluable {
 			}
 			a[i] = ai
 		}
-		return fun(a...)
+		return fun(c, a...)
 	}
 }
 
diff --git a/vendor/github.com/PaesslerAG/gval/functions.go b/vendor/github.com/PaesslerAG/gval/functions.go
index 396040f7c..4b4a3a082 100644
--- a/vendor/github.com/PaesslerAG/gval/functions.go
+++ b/vendor/github.com/PaesslerAG/gval/functions.go
@@ -1,55 +1,96 @@
 package gval
 
 import (
+	"context"
 	"fmt"
 	"reflect"
 )
 
-type function func(arguments ...interface{}) (interface{}, error)
+type function func(ctx context.Context, arguments ...interface{}) (interface{}, error)
 
 func toFunc(f interface{}) function {
 	if f, ok := f.(func(arguments ...interface{}) (interface{}, error)); ok {
+		return function(func(ctx context.Context, arguments ...interface{}) (interface{}, error) {
+			var v interface{}
+			errCh := make(chan error)
+			go func() {
+				result, err := f(arguments...)
+				v = result
+				errCh <- err
+			}()
+
+			select {
+			case <-ctx.Done():
+				return nil, ctx.Err()
+			case err := <-errCh:
+				return v, err
+			}
+		})
+	}
+	if f, ok := f.(func(ctx context.Context, arguments ...interface{}) (interface{}, error)); ok {
 		return function(f)
 	}
-	return func(args ...interface{}) (interface{}, error) {
-		fun := reflect.ValueOf(f)
-		t := fun.Type()
 
-		in, err := createCallArguments(t, args)
-		if err != nil {
-			return nil, err
-		}
-		out := fun.Call(in)
-
-		r := make([]interface{}, len(out))
-		for i, e := range out {
-			r[i] = e.Interface()
-		}
-
-		err = nil
-		errorInterface := reflect.TypeOf((*error)(nil)).Elem()
-		if len(r) > 0 && t.Out(len(r)-1).Implements(errorInterface) {
-			if r[len(r)-1] != nil {
-				err = r[len(r)-1].(error)
+	fun := reflect.ValueOf(f)
+	t := fun.Type()
+	return func(ctx context.Context, args ...interface{}) (interface{}, error) {
+		var v interface{}
+		errCh := make(chan error)
+		go func() {
+			in, err := createCallArguments(ctx, t, args)
+			if err != nil {
+				errCh <- err
+				return
 			}
-			r = r[0 : len(r)-1]
-		}
+			out := fun.Call(in)
 
-		switch len(r) {
-		case 0:
-			return nil, err
-		case 1:
-			return r[0], err
-		default:
-			return r, err
+			r := make([]interface{}, len(out))
+			for i, e := range out {
+				r[i] = e.Interface()
+			}
+
+			err = nil
+			errorInterface := reflect.TypeOf((*error)(nil)).Elem()
+			if len(r) > 0 && t.Out(len(r)-1).Implements(errorInterface) {
+				if r[len(r)-1] != nil {
+					err = r[len(r)-1].(error)
+				}
+				r = r[0 : len(r)-1]
+			}
+
+			switch len(r) {
+			case 0:
+				v = nil
+			case 1:
+				v = r[0]
+			default:
+				v = r
+			}
+			errCh <- err
+		}()
+
+		select {
+		case <-ctx.Done():
+			return nil, ctx.Err()
+		case err := <-errCh:
+			return v, err
 		}
 	}
 }
 
-func createCallArguments(t reflect.Type, args []interface{}) ([]reflect.Value, error) {
+func createCallArguments(ctx context.Context, t reflect.Type, args []interface{}) ([]reflect.Value, error) {
 	variadic := t.IsVariadic()
 	numIn := t.NumIn()
 
+	// if first argument is a context, use the given execution context
+	if numIn > 0 {
+		thisFun := reflect.ValueOf(createCallArguments)
+		thisT := thisFun.Type()
+		if t.In(0) == thisT.In(0) {
+			args = append([]interface{}{ctx}, args...)
+		}
+	}
+
 	if (!variadic && len(args) != numIn) || (variadic && len(args) < numIn-1) {
 		return nil, fmt.Errorf("invalid number of parameters")
 	}
diff --git a/vendor/github.com/PaesslerAG/gval/gval.go b/vendor/github.com/PaesslerAG/gval/gval.go
index ef6a5fcc2..57ed79b15 100644
--- a/vendor/github.com/PaesslerAG/gval/gval.go
+++ b/vendor/github.com/PaesslerAG/gval/gval.go
@@ -77,6 +77,16 @@ func JSON() Language {
 	return ljson
 }
 
+// Parentheses contains support for parentheses.
+func Parentheses() Language {
+	return parentheses
+}
+
+// Ident contains support for variables and functions.
+func Ident() Language {
+	return ident
+}
+
 // Base contains equal (==) and not equal (!=), perentheses and general support for variables, constants and functions
 // It contains true, false, (floating point) number, string  ("" or ``) and char ('') constants
 func Base() Language {
@@ -205,6 +215,14 @@ var propositionalLogic = NewLanguage(
 	base,
 )
 
+var parentheses = NewLanguage(
+	PrefixExtension('(', parseParentheses),
+)
+
+var ident = NewLanguage(
+	PrefixMetaPrefix(scanner.Ident, parseIdent),
+)
+
 var base = NewLanguage(
 	PrefixExtension(scanner.Int, parseNumber),
 	PrefixExtension(scanner.Float, parseNumber),
@@ -225,7 +243,7 @@ var base = NewLanguage(
 
 	InfixOperator("==", func(a, b interface{}) (interface{}, error) { return reflect.DeepEqual(a, b), nil }),
 	InfixOperator("!=", func(a, b interface{}) (interface{}, error) { return !reflect.DeepEqual(a, b), nil }),
-	PrefixExtension('(', parseParentheses),
+	parentheses,
 
 	Precedence("??", 0),
 
@@ -258,5 +276,5 @@ var base = NewLanguage(
 
 	Precedence("**", 200),
 
-	PrefixMetaPrefix(scanner.Ident, parseIdent),
+	ident,
 )
diff --git a/vendor/modules.txt b/vendor/modules.txt
index 20e6ac960..f9885d0d7 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -18,7 +18,7 @@ github.com/Masterminds/sprig
 # github.com/Masterminds/squirrel v1.1.1-0.20191017225151-12f2162c8d8d
 ## explicit
 github.com/Masterminds/squirrel
-# github.com/PaesslerAG/gval v1.0.1
+# github.com/PaesslerAG/gval v1.1.0
 ## explicit
 github.com/PaesslerAG/gval
 # github.com/PaesslerAG/jsonpath v0.1.1