diff --git a/changelog.txt b/changelog.txt
@@ -3,7 +3,7 @@
* Fixed bug in list item parsing when items indented >= 4 spaces (#52).
* Don't allow link labels with no non-whitespace characters
(jgm/CommonMark#322).
- * Fixed multiple issues with numeric entities (#33).
+ * Fixed multiple issues with numeric entities (#33, Nick Wellnhofer).
* Support CR and CRLF line endings (Ben Trask).
* Added test for different line endings to `api_test`.
* Allow NULL value in string setters (Nick Wellnhofer). (NULL
@@ -15,12 +15,29 @@
* Cope with broken `snprintf` on Windows (Nick Wellnhofer). On Windows,
`snprintf` returns -1 if the output was truncated. Fall back to
Windows-specific `_scprintf`.
+ * Switched length parameter on `cmark_markdown_to_html`,
+ `cmark_parser_feed`, and `cmark_parse_document` from `int`
+ to `size_t` (#53, Nick Wellnhofer).
+ * Use a custom type `bufsize_t` for all string sizes and indices.
+ This allows to switch to 64-bit string buffers by changing a single
+ typedef and a macro definition (Nick Wellnhofer).
+ * Hardened the `strbuf` code, checking for integer overflows and
+ adding range checks (Nick Wellnhofer).
+ * Removed unused function `cmark_strbuf_attach` (Nick Wellnhofer).
+ * Fixed all implicit 64-bit to 32-bit conversions that
+ `-Wshorten-64-to-32` warns about (Nick Wellnhofer).
+ * Added helper function `cmark_strbuf_safe_strlen` that converts
+ from `size_t` to `bufsize_t` and throws an error in case of
+ an overflow (Nick Wellnhofer).
+ * Abort on `strbuf` out of memory errors (Nick Wellnhofer).
+ Previously such errors were not being trapped. This involves
+ some internal changes to the `buffer` library that do not affect
+ the API.
* Factored out `S_find_first_nonspace` in `S_proces_line`.
Added fields `offset`, `first_nonspace`, `indent`, and `blank`
to `cmark_parser` struct. This just removes some repetition.
- * Fixed typo in `ENSURE_SIZE` macro (bryant).
* Added Racket Racket (5.3+) wrapper (Eli Barzilay).
- * Removed -pg from Debug build flags (#47).
+ * Removed `-pg` from Debug build flags (#47).
* Added Ubsan build target, to check for undefined behavior.
* Improved `make leakcheck`. We now return an error status if anything
in the loop fails. We now check `--smart` and `--normalize` options.