diff --git a/src/parser/filter_parser.rs b/src/parser/filter_parser.rs
index 308c9bf..913e234 100644
--- a/src/parser/filter_parser.rs
+++ b/src/parser/filter_parser.rs
@@ -7,8 +7,6 @@ use serde_json;
 #[grammar = "filter.pest"]
 pub struct FilterParser;
 
-use FilterParser::Rule;
-
 #[derive(Debug)]
 pub struct Filter {
     pub name: String,
@@ -67,7 +65,7 @@ pub fn parse_filter_string(input: &str) -> Result<Vec<Filter>, Box<dyn std::erro
 }
 
 fn parse_option_value(input: &str) -> Result<serde_json::Value, Box<dyn std::error::Error>> {
-    serde_json::from_str(input).map_err(|e| Box::new(e) as Box<dyn std::error::Error + Send + Sync>)
+    serde_json::from_str(input).map_err(|e| Box::new(e) as Box<dyn std::error::Error + Send + Sync + 'static>)
 }
 
 #[cfg(test)]