diff --git a/code/game/objects/structures/signs.dm b/code/game/objects/structures/signs.dm
index 65fbb86b1a0..cd5547a566a 100644
--- a/code/game/objects/structures/signs.dm
+++ b/code/game/objects/structures/signs.dm
@@ -1623,7 +1623,7 @@
 	qdel(src)
 
 /obj/structure/sign/flag/attack_hand(mob/user)
-	if(alert("Do you want to rip \the [src] from its place?","You think...","Yes","No") == "Yes")
+	if(tgui_alert(user, "Do you want to rip \the [src] from its place?","You think...",list("Yes","No")) == "Yes")
 		if(!Adjacent(user)) //Cannot bring up dialogue and walk away
 			return FALSE
 		visible_message(span_warning("\The [user] rips \the [src] in a single, decisive motion!" ))
diff --git a/code/modules/mob/living/living.dm b/code/modules/mob/living/living.dm
index ac15405af3a..badba2d940f 100644
--- a/code/modules/mob/living/living.dm
+++ b/code/modules/mob/living/living.dm
@@ -1343,7 +1343,7 @@
 /mob/living/verb/mob_sleep()
 	set name = "Sleep"
 	set category = "IC.Game"
-	if(!toggled_sleeping && alert(src, "Are you sure you wish to go to sleep? You will snooze until you use the Sleep verb again.", "Sleepy Time", "No", "Yes") == "No")
+	if(!toggled_sleeping && tgui_alert(src, "Are you sure you wish to go to sleep? You will snooze until you use the Sleep verb again.", "Sleepy Time", list("No", "Yes")) != "Yes")
 		return
 	toggled_sleeping = !toggled_sleeping
 	to_chat(src, span_notice("You are [toggled_sleeping ? "now sleeping. Use the Sleep verb again to wake up" : "no longer sleeping"]."))
diff --git a/code/modules/mob/living/silicon/ai/ai.dm b/code/modules/mob/living/silicon/ai/ai.dm
index 046f865a1ae..3533eb07d12 100644
--- a/code/modules/mob/living/silicon/ai/ai.dm
+++ b/code/modules/mob/living/silicon/ai/ai.dm
@@ -604,7 +604,9 @@ var/list/ai_verbs_default = list(
 	var/input
 	var/choice
 
-	choice = alert("Would you like to modify your hologram's model, or color?",,"Model","Color","Cancel")
+	choice = tgui_alert(src, "Would you like to modify your hologram's model, or color?", "Modify Hologram", list("Model","Color","Cancel"))
+	if(!choice || choice == "Cancel")
+		return
 
 	switch(choice)
 		if("Color")
diff --git a/code/modules/xenoarcheaology/tools/artifact_harvester.dm b/code/modules/xenoarcheaology/tools/artifact_harvester.dm
index b185f5f5d4a..1a264f85d84 100644
--- a/code/modules/xenoarcheaology/tools/artifact_harvester.dm
+++ b/code/modules/xenoarcheaology/tools/artifact_harvester.dm
@@ -378,7 +378,7 @@
 	if (href_list["drainbattery"])
 		if(inserted_battery)
 			if(inserted_battery.battery_effect && inserted_battery.stored_charge > 0)
-				if(alert("This action will dump all charge, safety gear is recommended before proceeding","Warning","Continue","Cancel"))
+				if(tgui_alert(usr, "This action will dump all charge, safety gear is recommended before proceeding","Warning",list("Continue","Cancel")) == "Continue")
 					if(!inserted_battery.battery_effect.activated)
 						inserted_battery.battery_effect.ToggleActivate(1)
 					last_process = world.time