diff --git a/src/config.rs b/src/config.rs
index 935063b..e87da82 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -88,7 +88,8 @@ impl CertConfig {
     pub fn filter_cert_config_items(self, valid_days: i32) -> Self {
         let mut filtered_cert_items = vec![];
 
-        let valid_days_secs = valid_days as i64 * 24 * 3600;
+        let secs_per_day =  24 * 3600;
+        let valid_days_secs = valid_days as i64 * secs_per_day;
         let secs_from_unix_epoch = SystemTime::now().duration_since(SystemTime::UNIX_EPOCH).unwrap().as_secs() as i64;
         for item in &self.cert_items {
             let mut item2 = item.clone();
@@ -96,11 +97,11 @@ impl CertConfig {
                 Ok(Some(x509_certificate)) => {
                     if x509_certificate.certificate_not_after >= (valid_days_secs + secs_from_unix_epoch) {
                         information!("Certificate: {} is valid: {} days", item.path,
-                            (x509_certificate.certificate_not_after - secs_from_unix_epoch)/valid_days_secs
+                            (x509_certificate.certificate_not_after - secs_from_unix_epoch) / secs_per_day
                         );
                     } else {
                         warning!("Certificate: {} is valid: {} days", item.path,
-                            (x509_certificate.certificate_not_after - secs_from_unix_epoch)/valid_days_secs
+                            (x509_certificate.certificate_not_after - secs_from_unix_epoch) / secs_per_day
                         );
                         filtered_cert_items.push(item2);
                     }