diff --git a/README.md b/README.md
index 0bb2a07..cdecb42 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,5 @@
 # replace
-`replace` is a command line utility for performing search-and-replace on files. It's similar to sed but there are a few differences:
+`replace` is a command line utility for performing in place search-and-replace on files. It's similar to sed but there are a few differences:
 
 * Modifies files when matches are found
 * Recursive search on directories with -r
@@ -78,7 +78,13 @@ By default, `replace` and `search` will exclude files (binaries, images, etc) th
 ### On huge directories
 If `replace` is taking too long on a large directory, try turning on the quiet flag with `-q`, only including the necessary file types with `--include` or limiting the lines shown in a preview with `-n`.
 
+## Limitations
 
+### Line length
+By default, `replace` works on files with lines of 400 characters or less. If you need to work on long lines, gnu `sed` supports unlimited line length.
+
+### Symbolic links
+By default, `replace` does not traverse symbolic links for files in directories.
 ## What it looks like
 ![replace](http://i.imgur.com/qmJjS.png)
 
diff --git a/replace.js b/replace.js
index d1e9599..5467689 100644
--- a/replace.js
+++ b/replace.js
@@ -10,6 +10,7 @@ module.exports = function(opts) {
         replaceFunc,
         lineCount = 0,
         limit = 400, // chars per line
+        // XXX The posix standard specifies that conforming sed implementations shall support at least 8192 byte line lengths.
         options;
 
     options = opts;
diff --git a/test/a/longline.txt b/test/a/longline.txt
new file mode 100644
index 0000000..11b99fc
--- /dev/null
+++ b/test/a/longline.txt
@@ -0,0 +1,19 @@
+This file has several long lines.
+64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms
+64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms
+64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms
+64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms
+64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms
+64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms 64 bytes from 8.8.8.8: icmp_seq=4760 ttl=47 time=36.730 ms
+
+
+
+
+
+
+
+
+
+
+
+