diff --git a/README.md b/README.md
index a716531..9a18788 100644
--- a/README.md
+++ b/README.md
@@ -27,7 +27,7 @@ Windows is the primary development OS, but I've made an effort to support linux
 
 # Requirements
 
-1. You would need to download `ffmpeg`, `aria2c` and `mp4decrypter` (from Bento4 SDK) and ensure they are in path (typing their name in cmd should invoke them).
+1. You would need to download `ffmpeg`, `aria2c` and `mp4decrypt` (from Bento4 SDK) and ensure they are in path (typing their name in cmd should invoke them).
 
 # Usage
 
diff --git a/main.py b/main.py
index e5dc830..cdf1afd 100644
--- a/main.py
+++ b/main.py
@@ -901,7 +901,7 @@ def check_for_aria():
     try:
         subprocess.Popen(["aria2c", "-v"],
                          stdout=subprocess.DEVNULL,
-                         stdin=subprocess.DEVNULL).wait()
+                         stderr=subprocess.DEVNULL).wait()
         return True
     except FileNotFoundError:
         return False
@@ -915,8 +915,8 @@ def check_for_aria():
 def check_for_ffmpeg():
     try:
         subprocess.Popen(["ffmpeg"],
-                         stdout=subprocess.DEVNULL,
-                         stdin=subprocess.DEVNULL).wait()
+                         stderr=subprocess.DEVNULL,
+                         stdout=subprocess.DEVNULL).wait()
         return True
     except FileNotFoundError:
         return False
@@ -930,8 +930,8 @@ def check_for_ffmpeg():
 def check_for_mp4decrypt():
     try:
         subprocess.Popen(["mp4decrypt"],
-                         stdout=subprocess.DEVNULL,
-                         stdin=subprocess.DEVNULL).wait()
+                         stderr=subprocess.DEVNULL,
+                         stdout=subprocess.DEVNULL).wait()
         return True
     except FileNotFoundError:
         return False