diff --git a/simple-ca.py b/simple-ca.py
index 0ee3d72..6de34de 100755
--- a/simple-ca.py
+++ b/simple-ca.py
@@ -29,7 +29,7 @@ import re
 import subprocess
 import sys
 
-OPENSSL = "openssl"
+OPENSSL = "/usr/bin/openssl"
 
 
 def _err(msg):