diff --git a/README.md b/README.md
index c3fa6e7..4dc28d4 100644
--- a/README.md
+++ b/README.md
@@ -536,7 +536,7 @@ To get the DN and CA of your signature.
     openssl smime -in your_signed.msg \
      -pk7out | openssl pkcs7 -print_certs
 
-To Verfy the message agaisnt the CA certificate.
+To Verfy the message against the CA certificate.
 
     openssl smime -in your_signed.msg \
      -CAfile /etc/grid-security/certificates/dd4b34ea.0 \