diff --git a/README.rst b/README.rst
index a367dd8..be984c1 100644
--- a/README.rst
+++ b/README.rst
@@ -80,7 +80,7 @@ CLI help
                   [--outgoing-ssl OUTGOING_SSL] [-F OUTGOING_FROM]
                   [-T OUTGOING_TO [OUTGOING_TO ...]] [-S OUTGOING_SUBJECT]
                   [-A OUTGOING_ATTACHMENT] [-M OUTGOING_MESSAGE] [-w] [--test]
-                  [-s] [--debug] [-v]
+                  [-s] [--debug] [--log-file LOG_FILE] [-v]
                   [file_path [file_path ...]]
 
     Parses DMARC reports
@@ -181,6 +181,7 @@ CLI help
       --test                do not move or delete IMAP messages
       -s, --silent          only print errors and warnings
       --debug               print debugging information
+      --log-file LOG_FILE   output logging to a file
       -v, --version         show program's version number and exit
 
 Sample aggregate report output
diff --git a/docs/index.rst b/docs/index.rst
index 3a9b3b3..6d4a26d 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -84,7 +84,7 @@ CLI help
                   [--outgoing-ssl OUTGOING_SSL] [-F OUTGOING_FROM]
                   [-T OUTGOING_TO [OUTGOING_TO ...]] [-S OUTGOING_SUBJECT]
                   [-A OUTGOING_ATTACHMENT] [-M OUTGOING_MESSAGE] [-w] [--test]
-                  [-s] [--debug] [-v]
+                  [-s] [--debug] [--log-file LOG_FILE] [-v]
                   [file_path [file_path ...]]
 
    Parses DMARC reports
@@ -185,6 +185,7 @@ CLI help
      --test                do not move or delete IMAP messages
      -s, --silent          only print errors and warnings
      --debug               print debugging information
+     --log-file LOG_FILE   output logging to a file
      -v, --version         show program's version number and exit
 
 Sample aggregate report output