diff --git a/CHANGELOG.md b/CHANGELOG.md
index bf24134..ed44ad3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## 1.0.0beta3 (April 7, 2017)
+
+* In `editorPrompt()`, change `!iscntrl(c)` to `!iscntrl(c) && c < 128`, so
+  that we don't try to append special keys like the arrow keys to the prompt
+  input. (Thanks @fmdkdd)
+
 ## 1.0.0beta2 (April 6, 2017)
 
 * Replace all instances of `isprint()` with `!iscntrl()`, so that extended
@@ -9,7 +15,7 @@
 ## 1.0.0beta1 (April 6, 2017)
 
 * Add changelog.
-* Fix landing page typo.
+* Fix landing page typo. (Thanks @mtr)
 
 ## 1.0.0beta0 (April 4, 2017)
 
diff --git a/doc/05.aTextEditor.md b/doc/05.aTextEditor.md
index c28262d..f049fb5 100644
--- a/doc/05.aTextEditor.md
+++ b/doc/05.aTextEditor.md
@@ -413,6 +413,11 @@ and allocate that amount of memory before appending to `buf`. We also make sure
 that `buf` ends with a `\0` character, because both `editorSetStatusMessage()`
 and the caller of `editorPrompt()` will use it to know where the string ends.
 
+Notice that we have to make sure the input key isn't one of the special keys in
+the `editorKey` enum, which have high integer values. To do that, we test
+whether the input key is in the range of a `char` by making sure it is less
+than `128`.
+
 Now let's prompt the user for a filename in `editorSave()`, when `E.filename`
 is `NULL`.
 
diff --git a/leg.yml b/leg.yml
index 9f6a6e9..cdc2503 100644
--- a/leg.yml
+++ b/leg.yml
@@ -1,6 +1,6 @@
 ---
 :name: kilo
-:version: "1.0.0beta2"
+:version: "1.0.0beta3"
 :title: Build Your Own Text Editor
 :rouge_theme: github
 :bold_weight: 500
diff --git a/steps.diff b/steps.diff
index 22acac4..81af52c 100644
--- a/steps.diff
+++ b/steps.diff
@@ -3106,7 +3106,7 @@ diff --git a/kilo.c b/kilo.c
 +        editorSetStatusMessage("");
 +        return buf;
 +      }
-+    } else if (!iscntrl(c)) {
++    } else if (!iscntrl(c) && c < 128) {
 +      if (buflen == bufsize - 1) {
 +        bufsize *= 2;
 +        buf = realloc(buf, bufsize);
@@ -3330,7 +3330,7 @@ diff --git a/kilo.c b/kilo.c
 +        if (callback) callback(buf, c);
          return buf;
        }
-     } else if (!iscntrl(c)) {
+     } else if (!iscntrl(c) && c < 128) {
 @@ -594,6 +596,8 @@ char *editorPrompt(char *prompt) {
        buf[buflen++] = c;
        buf[buflen] = '\0';