diff --git a/types/luau.luau b/types/luau.luau
index 132808d..189254b 100644
--- a/types/luau.luau
+++ b/types/luau.luau
@@ -14,9 +14,9 @@
 	* https://github.com/Roblox/luau/blob/bd229816c0a82a8590395416c81c333087f541fd/Compiler/include/luacode.h#L13
 ]=]
 export type CompileOptions = {
-	optimizationLevel: number,
-	coverageLevel: number,
-	debugLevel: number,
+	optimizationLevel: number?,
+	coverageLevel: number?,
+	debugLevel: number?,
 }
 
 --[=[
diff --git a/types/process.luau b/types/process.luau
index c9d738e..3c89e62 100644
--- a/types/process.luau
+++ b/types/process.luau
@@ -149,7 +149,9 @@ process.env = (nil :: any) :: { [string]: string? }
 
 	@param code The exit code to set
 ]=]
-function process.exit(code: number?) end
+function process.exit(code: number?): never
+	return nil :: any
+end
 
 --[=[
 	@within Process
diff --git a/types/task.luau b/types/task.luau
index 924e6bb..81bdc2f 100644
--- a/types/task.luau
+++ b/types/task.luau
@@ -55,13 +55,11 @@ end
 
 	Delays a thread or function to run after `duration` seconds.
 
-	If no `duration` is given, this will wait for the minimum amount of time possible.
-
 	@param functionOrThread The function or thread to delay
 	@return The thread that will be delayed
 ]=]
 function task.delay<T...>(
-	duration: number?,
+	duration: number,
 	functionOrThread: thread | (T...) -> ...any,
 	...: T...
 ): thread