diff --git a/cert-info.sh b/cert-info.sh
index 172cb63..7f6cdef 100644
--- a/cert-info.sh
+++ b/cert-info.sh
@@ -35,7 +35,11 @@ if [ -n "${certdest}" ]; then
   certpath="$(printf "%s" "${certdest}" | cut -d':' -f1)"
 
   if [ -f "${certpath}" ]; then
-    certdata=$(cat "${certpath}")
+    if grep -q 'BEGIN CERTIFICATE' "${certpath}"; then
+      certdata=$(openssl x509 -inform pem -in "${certpath}")
+    else
+      certdata=$(openssl x509 -inform der -in "${certpath}")
+    fi
 
   else
     certport="$(printf "%s" "${certdest}" | cut -d':' -f2 -s)"