diff --git a/app/js/mutations/ChangeTodoStatusMutation.js b/app/js/mutations/ChangeTodoStatusMutation.js
index 2cb50e8..27d7b14 100644
--- a/app/js/mutations/ChangeTodoStatusMutation.js
+++ b/app/js/mutations/ChangeTodoStatusMutation.js
@@ -51,7 +51,7 @@ export default class ChangeTodoStatusMutation extends Relay.Mutation {
     var viewerPayload;
     if (this.props.viewer.todos) {
       viewerPayload = {id: this.props.viewer.id, todos: {}};
-      if (this.props.viewer.todos.completedCount != null) {
+      if (this.props.viewer.todos.completedCount !== null) {
         viewerPayload.todos.completedCount = this.props.complete
           ? this.props.viewer.todos.completedCount + 1
           : this.props.viewer.todos.completedCount - 1;
diff --git a/app/js/mutations/MarkAllTodosMutation.js b/app/js/mutations/MarkAllTodosMutation.js
index 5cb6a6d..40043bb 100644
--- a/app/js/mutations/MarkAllTodosMutation.js
+++ b/app/js/mutations/MarkAllTodosMutation.js
@@ -64,7 +64,7 @@ export default class MarkAllTodosMutation extends Relay.Mutation {
             },
           }));
       }
-      if (this.props.todos.totalCount != null) {
+      if (this.props.todos.totalCount !== null) {
         viewerPayload.todos.completedCount = this.props.complete
           ? this.props.todos.totalCount
           : 0;
diff --git a/app/js/mutations/RemoveCompletedTodosMutation.js b/app/js/mutations/RemoveCompletedTodosMutation.js
index 2152856..c211686 100644
--- a/app/js/mutations/RemoveCompletedTodosMutation.js
+++ b/app/js/mutations/RemoveCompletedTodosMutation.js
@@ -52,7 +52,7 @@ export default class RemoveCompletedTodosMutation extends Relay.Mutation {
     var newTotalCount;
     if (this.props.todos) {
       var {completedCount, totalCount} = this.props.todos;
-      if (completedCount != null && totalCount != null) {
+      if (completedCount !== null && totalCount !== null) {
         newTotalCount = totalCount - completedCount;
       }
       if (this.props.todos.edges) {
diff --git a/app/js/mutations/RemoveTodoMutation.js b/app/js/mutations/RemoveTodoMutation.js
index 88460f7..a674370 100644
--- a/app/js/mutations/RemoveTodoMutation.js
+++ b/app/js/mutations/RemoveTodoMutation.js
@@ -52,12 +52,12 @@ export default class RemoveTodoMutation extends Relay.Mutation {
     var viewerPayload;
     if (this.props.viewer.todos) {
       viewerPayload = {id: this.props.viewer.id, todos: {}};
-      if (this.props.viewer.todos.completedCount != null) {
+      if (this.props.viewer.todos.completedCount !== null) {
         viewerPayload.todos.completedCount = this.props.todo.complete === true
           ? this.props.viewer.todos.completedCount - 1
           : this.props.viewer.todos.completedCount;
       }
-      if (this.props.viewer.todos.totalCount != null) {
+      if (this.props.viewer.todos.totalCount !== null) {
         viewerPayload.todos.totalCount = this.props.viewer.todos.totalCount - 1;
       }
     }