diff --git a/aur-check.py b/aur-check.py
index 126b7cf..05d8823 100755
--- a/aur-check.py
+++ b/aur-check.py
@@ -4,7 +4,7 @@
 
 import argparse
 import os
-import subprocess
+import pyalpm
 
 from arch import ArchDatabase, ArchPackage
 from aur import AURPackage
@@ -64,8 +64,7 @@ class AURChecker:
 
     def compare(package, aur_package):
         """Compare package two versions and return status."""
-        result = subprocess.check_output(["vercmp", package.get_version(), aur_package.get_version()])
-        result = int(result)
+        result = pyalpm.vercmp(package.get_version(), aur_package.get_version())
         if result < 0:
             return AURChecker.STATUS_NEEDS_UPDATE
         elif result > 0: