diff --git a/monkey/monkey_island/cc/ui/src/components/pages/MapPage.js b/monkey/monkey_island/cc/ui/src/components/pages/MapPage.js
index fa782eac7..d24756978 100644
--- a/monkey/monkey_island/cc/ui/src/components/pages/MapPage.js
+++ b/monkey/monkey_island/cc/ui/src/components/pages/MapPage.js
@@ -92,7 +92,7 @@ class MapPageComponent extends AuthComponent {
         body: JSON.stringify({kill_time: Date.now() / 1000.0})
       })
       .then(res => res.json())
-      .then(res => {this.setState({killPressed: true})});
+      .then(() => {this.setState({killPressed: true})});
   };
 
   renderKillDialogModal = () => {
diff --git a/monkey/monkey_island/cc/ui/src/components/report-components/attack/ReportMatrixComponent.js b/monkey/monkey_island/cc/ui/src/components/report-components/attack/ReportMatrixComponent.js
index 00420f095..51d349b30 100644
--- a/monkey/monkey_island/cc/ui/src/components/report-components/attack/ReportMatrixComponent.js
+++ b/monkey/monkey_island/cc/ui/src/components/report-components/attack/ReportMatrixComponent.js
@@ -53,7 +53,7 @@ class ReportMatrixComponent extends React.Component {
   }
 
   renderTechnique(technique) {
-    if (technique == null || typeof technique === undefined) {
+    if (technique == null || typeof technique === 'undefined') {
       return (<div/>)
     } else {
       return (
diff --git a/monkey/monkey_island/cc/ui/src/components/report-components/security/PostBreachParser.js b/monkey/monkey_island/cc/ui/src/components/report-components/security/PostBreachParser.js
index 39308e102..8157aa78a 100644
--- a/monkey/monkey_island/cc/ui/src/components/report-components/security/PostBreachParser.js
+++ b/monkey/monkey_island/cc/ui/src/components/report-components/security/PostBreachParser.js
@@ -50,7 +50,7 @@ function aggregateMultipleResultsPba(results) {
   for (let i = 0; i < results.length; i++) {
     if (multipleResultsPbas.includes(results[i].name))
       aggregateResults(results[i]);
-    if ((results[i].name === PROCESS_LIST_COLLECTION) && (typeof results[i].result[0] !== "string"))
+    if ((results[i].name === PROCESS_LIST_COLLECTION) && (typeof results[i].result[0] !== 'string'))
       modifyProcessListCollectionResult(results[i].result);
   }