diff --git a/go.mod b/go.mod
index d4ef8e0bb..ae4d9215b 100644
--- a/go.mod
+++ b/go.mod
@@ -9,7 +9,7 @@ require (
 	cloud.google.com/go/storage v1.29.0
 	github.com/DATA-DOG/go-sqlmock v1.5.0
 	github.com/MakeNowJust/heredoc v1.0.0
-	github.com/antonmedv/expr v1.12.5
+	github.com/antonmedv/expr v1.15.3
 	github.com/envoyproxy/protoc-gen-validate v0.6.7
 	github.com/go-playground/validator/v10 v10.4.1
 	github.com/golang-migrate/migrate/v4 v4.15.2
@@ -29,7 +29,7 @@ require (
 	github.com/sergi/go-diff v1.0.0
 	github.com/sirupsen/logrus v1.8.1
 	github.com/spf13/cobra v1.2.1
-	github.com/stretchr/testify v1.8.1
+	github.com/stretchr/testify v1.8.4
 	github.com/uptrace/opentelemetry-go-extra/otelgorm v0.1.17
 	go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.28.0
 	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.37.0
diff --git a/go.sum b/go.sum
index ce5129532..e7e90cb19 100644
--- a/go.sum
+++ b/go.sum
@@ -161,8 +161,8 @@ github.com/alecthomas/units v0.0.0-20190924025748-f65c72e2690d/go.mod h1:rBZYJk5
 github.com/alexflint/go-filemutex v0.0.0-20171022225611-72bdc8eae2ae/go.mod h1:CgnQgUtFrFz9mxFNtED3jI5tLDjKlOM+oUF/sTk6ps0=
 github.com/alexflint/go-filemutex v1.1.0/go.mod h1:7P4iRhttt/nUvUOrYIhcpMzv2G6CY9UnI16Z+UJqRyk=
 github.com/antihax/optional v1.0.0/go.mod h1:uupD/76wgC+ih3iEmQUL+0Ugr19nfwCT1kdvxnR2qWY=
-github.com/antonmedv/expr v1.12.5 h1:Fq4okale9swwL3OeLLs9WD9H6GbgBLJyN/NUHRv+n0E=
-github.com/antonmedv/expr v1.12.5/go.mod h1:FPC8iWArxls7axbVLsW+kpg1mz29A1b2M6jt+hZfDkU=
+github.com/antonmedv/expr v1.15.3 h1:q3hOJZNvLvhqE8OHBs1cFRdbXFNKuA+bHmRaI+AmRmI=
+github.com/antonmedv/expr v1.15.3/go.mod h1:0E/6TxnOlRNp81GMzX9QfDPAmHo2Phg00y4JUv1ihsE=
 github.com/apache/arrow/go/arrow v0.0.0-20210818145353-234c94e4ce64/go.mod h1:2qMFB56yOP3KzkB3PbYZ4AlUFg3a88F67TIx5lB/WwY=
 github.com/apache/arrow/go/arrow v0.0.0-20211013220434-5962184e7a30/go.mod h1:Q7yQnSMnLvcXlZ8RV+jwz/6y1rQTqbX6C82SndT52Zs=
 github.com/armon/circbuf v0.0.0-20150827004946-bbbad097214e/go.mod h1:3U/XgcO3hCbHZ8TKRvWD2dDTCfh9M9ya+I9JpbB7O8o=
@@ -1262,8 +1262,9 @@ github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/
 github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
-github.com/stretchr/testify v1.8.1 h1:w7B6lhMri9wdJUVmEZPGGhZzrYTPvgJArz7wNPgYKsk=
 github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
+github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
+github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
 github.com/subosito/gotenv v1.2.0 h1:Slr1R9HxAlEKefgq5jn9U+DnETlIUa6HfgEzj0g5d7s=
 github.com/subosito/gotenv v1.2.0/go.mod h1:N0PQaV/YGNqwC0u51sEeR/aUtSLEXKX9iv69rRypqCw=
 github.com/syndtr/gocapability v0.0.0-20170704070218-db04d3cc01c8/go.mod h1:hkRG7XYTFWNJGYcbNJQlaLq0fg1yr4J4t/NcTQtrfww=
diff --git a/pkg/evaluator/expression_test.go b/pkg/evaluator/expression_test.go
index 3cd0d5a42..018f994df 100644
--- a/pkg/evaluator/expression_test.go
+++ b/pkg/evaluator/expression_test.go
@@ -173,6 +173,15 @@ func TestEvaluate(t *testing.T) {
 			},
 			expectedResult: true,
 		},
+		{
+			expression: "lower($appeal.role) == 'bigquery data viewer'",
+			params: map[string]interface{}{
+				"appeal": map[string]interface{}{
+					"role": "BigQuery Data Viewer",
+				},
+			},
+			expectedResult: true,
+		},
 		{
 			expression: "$Bar",
 			aStruct: ParamStruct{