diff --git a/ShhShell.xcodeproj/project.pbxproj b/ShhShell.xcodeproj/project.pbxproj
index ecfabd1..23d6933 100644
--- a/ShhShell.xcodeproj/project.pbxproj
+++ b/ShhShell.xcodeproj/project.pbxproj
@@ -616,6 +616,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = com.neon443.ShhShell;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_EMIT_LOC_STRINGS = YES;
+				SWIFT_STRICT_CONCURRENCY = complete;
 				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 			};
@@ -648,6 +649,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = com.neon443.ShhShell;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_EMIT_LOC_STRINGS = YES;
+				SWIFT_STRICT_CONCURRENCY = complete;
 				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 			};
diff --git a/ShhShell/SSH/SSHHandler.swift b/ShhShell/SSH/SSHHandler.swift
index 699e219..0c17db3 100644
--- a/ShhShell/SSH/SSHHandler.swift
+++ b/ShhShell/SSH/SSHHandler.swift
@@ -10,7 +10,7 @@ import LibSSH
 import OSLog
 import SwiftUI
 
-class SSHHandler: ObservableObject {
+class SSHHandler: @unchecked Sendable, ObservableObject {
 	private var session: ssh_session?
 	 var channel: ssh_channel?
 	
@@ -240,12 +240,10 @@ class SSHHandler: ObservableObject {
 		//if u got this far, youre authed!
 		withAnimation { authorized = true }
 		
-		DispatchQueue.main.asyncAfter(deadline: .now()+10) {
-			ssh_key_free(pubkey)
-			ssh_key_free(privkey)
-			try? fileManager.removeItem(at: tempPubkey)
-			try? fileManager.removeItem(at: tempKey)
-		}
+		ssh_key_free(pubkey)
+		ssh_key_free(privkey)
+		try? FileManager.default.removeItem(at: tempPubkey)
+		try? FileManager.default.removeItem(at: tempKey)
 		return
 	}
 	
@@ -334,7 +332,6 @@ class SSHHandler: ObservableObject {
 	}
 	
 	func readFromChannel() -> String? {
-		print(connected)
 		if !connected {
 			return nil
 		}
@@ -366,6 +363,7 @@ class SSHHandler: ObservableObject {
 	
 	func writeToChannel(_ string: String?) {
 		guard let string = string else { return }
+		guard channel != nil else { return }
 		guard ssh_channel_is_open(channel) != 0 || ssh_channel_is_eof(channel) == 0 else {
 			disconnect()
 			return
diff --git a/ShhShell/Views/Terminal/SSHTerminalView.swift b/ShhShell/Views/Terminal/SSHTerminalView.swift
index ac298ea..89a46c8 100644
--- a/ShhShell/Views/Terminal/SSHTerminalView.swift
+++ b/ShhShell/Views/Terminal/SSHTerminalView.swift
@@ -9,7 +9,8 @@ import Foundation
 import UIKit
 import SwiftTerm
 
-class SSHTerminalView: TerminalView, TerminalViewDelegate {
+@MainActor
+class SSHTerminalView: TerminalView, Sendable, @preconcurrency TerminalViewDelegate {
 	var handler: SSHHandler?
 	var sshQueue: DispatchQueue
 	
@@ -29,7 +30,7 @@ class SSHTerminalView: TerminalView, TerminalViewDelegate {
 			
 			while handler.connected {
 				if let read = handler.readFromChannel() {
-					DispatchQueue.main.async { self.feed(text: read) }
+					self.feed(text: read)
 				} else {
 					usleep(100_000)
 				}
@@ -42,11 +43,11 @@ class SSHTerminalView: TerminalView, TerminalViewDelegate {
 		fatalError("unimplemented")
 	}
 
-	public func scrolled(source: TerminalView, position: Double) {
+	nonisolated public func scrolled(source: TerminalView, position: Double) {
 		print("scrolled to \(position)")
 	}
 	
-	public func setTerminalTitle(source: TerminalView, title: String) {
+	nonisolated public func setTerminalTitle(source: TerminalView, title: String) {
 		print("set title to \(title)")
 	}
 	
@@ -59,11 +60,11 @@ class SSHTerminalView: TerminalView, TerminalViewDelegate {
 		handler?.writeToChannel(String(data: data, encoding: .utf8))
 	}
 	
-	public func clipboardCopy(source: TerminalView, content: Data) {
+	nonisolated public func clipboardCopy(source: TerminalView, content: Data) {
 		print(content)
 	}
 	
-	public func hostCurrentDirectoryUpdate(source: TerminalView, directory: String?) {
+	nonisolated public func hostCurrentDirectoryUpdate(source: TerminalView, directory: String?) {
 		print("new dir: \(directory ?? "")")
 	}
 	
@@ -73,7 +74,7 @@ class SSHTerminalView: TerminalView, TerminalViewDelegate {
 		UIApplication.shared.open(url, options: [:])
 	}
 	
-	public func rangeChanged(source: TerminalView, startY: Int, endY: Int) {
+	nonisolated public func rangeChanged(source: TerminalView, startY: Int, endY: Int) {
 		print(startY, endY)
 	}
 }