diff --git a/src/exporters/qemu.rs b/src/exporters/qemu.rs
index de3355e5..5ed27073 100644
--- a/src/exporters/qemu.rs
+++ b/src/exporters/qemu.rs
@@ -137,7 +137,7 @@ impl QemuExporter {
         trace!("Got {} processes to filter.", processes.len());
         for vecp in processes.iter() {
             if !vecp.is_empty() {
-                if let Some(pr) = vecp.get(0) {
+                if let Some(pr) = vecp.first() {
                     if let Some(res) = pr
                         .process
                         .cmdline
diff --git a/src/sensors/utils.rs b/src/sensors/utils.rs
index 1827d054..f3b5de7f 100644
--- a/src/sensors/utils.rs
+++ b/src/sensors/utils.rs
@@ -449,12 +449,12 @@ impl ProcessTracker {
     ) -> HashMap<String, String> {
         let mut result = self.procs.iter().filter(
             // get all processes that have process records
-            |x| !x.is_empty() && x.get(0).unwrap().process.pid == pid,
+            |x| !x.is_empty() && x.first().unwrap().process.pid == pid,
         );
         let process = result.next().unwrap();
         let mut description = HashMap::new();
         let regex_clean_container_id = Regex::new("[[:alnum:]]{12,}").unwrap();
-        if let Some(_p) = process.get(0) {
+        if let Some(_p) = process.first() {
             // if we have the cgroups data from the original process struct
             if let Ok(procfs_process) =
                 procfs::process::Process::new(pid.to_string().parse::<i32>().unwrap())
@@ -643,7 +643,7 @@ impl ProcessTracker {
             .iter()
             .filter(|x| !x.is_empty() && x.get(0).unwrap().process.pid == pid);
         let process = result.next().unwrap();
-        if let Some(p) = process.get(0) {
+        if let Some(p) = process.first() {
             let cmdline_request = p.process.cmdline(self);
             if let Ok(mut cmdline_vec) = cmdline_request {
                 let mut cmdline = String::from("");