diff --git a/core/archive_util.js b/core/archive_util.js
index a142584b..5f1eff31 100644
--- a/core/archive_util.js
+++ b/core/archive_util.js
@@ -208,13 +208,13 @@ module.exports = class ArchiveUtil {
         //  pty.js doesn't currently give us a error when things fail,
         //  so we have this horrible, horrible hack:
         let err;
-        proc.once('data', d => {
+        proc.onData(d => {
             if (_.isString(d) && d.startsWith('execvp(3) failed.')) {
                 err = Errors.ExternalProcess(`${action} failed: ${d.trim()}`);
             }
         });
 
-        proc.once('exit', exitCode => {
+        proc.onExit(exitCode => {
             return cb(
                 exitCode
                     ? Errors.ExternalProcess(
@@ -358,7 +358,7 @@ module.exports = class ArchiveUtil {
             output += data;
         });
 
-        proc.once('exit', exitCode => {
+        proc.onExit(exitCode => {
             if (exitCode) {
                 return cb(
                     Errors.ExternalProcess(`List failed with exit code: ${exitCode}`)
diff --git a/core/door.js b/core/door.js
index 313adf74..3cab2b36 100644
--- a/core/door.js
+++ b/core/door.js
@@ -113,7 +113,7 @@ module.exports = class Door {
                             spawnOptions
                         );
 
-                        prePty.once('exit', exitCode => {
+                        prePty.onExit(exitCode => {
                             this.client.log.info(
                                 { exitCode: exitCode },
                                 'Door pre-command exited'
@@ -165,7 +165,7 @@ module.exports = class Door {
 
                         this.doorPty.onData(this.doorDataHandler.bind(this));
 
-                        this.doorPty.once('close', () => {
+                        this.doorPty.onExit(exitCode => {
                             return this.restoreIo(this.doorPty);
                         });
                     } else if ('socket' === this.io) {
@@ -178,7 +178,7 @@ module.exports = class Door {
                         );
                     }
 
-                    this.doorPty.once('exit', exitCode => {
+                    this.doorPty.onExit(exitCode => {
                         this.client.log.info({ exitCode: exitCode }, 'Door exited');
 
                         if (this.sockServer) {
diff --git a/core/event_scheduler.js b/core/event_scheduler.js
index 076e116f..0140a776 100644
--- a/core/event_scheduler.js
+++ b/core/event_scheduler.js
@@ -166,8 +166,8 @@ class ScheduledEvent {
                 });
                 return cb(e);
             }
-
-            proc.once('exit', exitCode => {
+            
+            proc.onExit(exitCode => {
                 if (exitCode) {
                     Log.warn(
                         { eventName: this.name, action: this.action, exitCode: exitCode },
diff --git a/core/file_transfer.js b/core/file_transfer.js
index 01eec9b8..264bb97d 100644
--- a/core/file_transfer.js
+++ b/core/file_transfer.js
@@ -485,11 +485,7 @@ exports.getModule = class TransferFileModule extends MenuModule {
             }
         });
 
-        externalProc.once('close', () => {
-            return this.restorePipeAfterExternalProc();
-        });
-
-        externalProc.once('exit', exitCode => {
+        externalProc.onExit(exitCode => {
             this.client.log.debug(
                 { cmd: cmd, args: args, exitCode: exitCode },
                 'Process exited'