diff --git a/v2/pkg/protocols/common/expressions/variables.go b/v2/pkg/protocols/common/expressions/variables.go
index d064d577..c16a80d2 100644
--- a/v2/pkg/protocols/common/expressions/variables.go
+++ b/v2/pkg/protocols/common/expressions/variables.go
@@ -6,7 +6,7 @@ import (
 	"strings"
 )
 
-var unresolvedVariablesRegex = regexp.MustCompile(`(?:%7[B|b]|{){2}([^}]+)(?:%7[D|d]|}){2}["')}]*`)
+var unresolvedVariablesRegex = regexp.MustCompile(`(?:%7[B|b]|\{){2}([^}]+)(?:%7[D|d]|\}){2}["'\)\}]*`)
 
 // ContainsUnresolvedVariables returns an error with variable names if the passed
 // input contains unresolved {{<pattern-here>}} variables.