diff --git a/README.md b/README.md
index 4f43b9ee..7451f029 100644
--- a/README.md
+++ b/README.md
@@ -132,17 +132,18 @@ library archives (`.a`).
 | GCC            | 4.7.3         | NO       | `build-essential`  | `base-devel`   | NO       |                |
 | CMake          | 3.0.0         | NO       | `cmake`            | `cmake`        | NO       |                |
 | pkg-config     | any           | NO       | `pkg-config`       | `base-devel`   | NO       |                |
-| Boost          | 1.58          | NO       | `libboost-all-dev` | `boost`        | NO       |                |
-| BerkeleyDB     | 4.8           | NO       | `libdb{,++}-dev`   | `db`           | NO       |                |
-| libevent       | 2.0           | NO       | `libevent-dev`     | `libevent`     | NO       |                |
-| libunbound     | 1.4.16        | YES      | `libunbound-dev`   | `unbound`      | NO       |                |
+| Boost          | 1.58          | NO       | `libboost-all-dev` | `boost`        | NO       | C++ libraries  |
+| libevent       | 2.0           | NO       | `libevent-dev`     | `libevent`     | NO       | Network IO     |
+| libunbound     | 1.4.16        | YES      | `libunbound-dev`   | `unbound`      | NO       | DNS resolver   |
 | libminiupnpc   | 2.0           | YES      | `libminiupnpc-dev` | `miniupnpc`    | YES      | NAT punching   |
-| libunwind      | any           | NO       | `libunwind8-dev`   | `libunwind`    | YES      | stack traces   |
-| ldns           | 1.6.17        | NO       | `libldns-dev`      | `ldns`         | YES      | ?              |
-| expat          | 1.1           | NO       | `libexpat1-dev`    | `expat`        | YES      | ?              |
-| GTest          | 1.5           | YES      | `libgtest-dev`^    | `gtest`        | YES      | test suite     |
-| Doxygen        | any           | NO       | `doxygen`          | `doxygen`      | YES      | documentation  |
-| Graphviz       | any           | NO       | `graphviz`         | `graphviz`     | YES      | documentation  |
+| libunwind      | any           | NO       | `libunwind8-dev`   | `libunwind`    | YES      | Stack traces   |
+| liblzma        | any           | NO       | `liblzma-dev`      | `xz`           | YES      | For libunwind  |
+| ldns           | 1.6.17        | NO       | `libldns-dev`      | `ldns`         | YES      | SSL toolkit    |
+| expat          | 1.1           | NO       | `libexpat1-dev`    | `expat`        | YES      | XML parsing    |
+| GTest          | 1.5           | YES      | `libgtest-dev`^    | `gtest`        | YES      | Test suite     |
+| BerkeleyDB     | 4.8           | NO       | `libdb{,++}-dev`   | `db`           | YES      | Historic DB    |
+| Doxygen        | any           | NO       | `doxygen`          | `doxygen`      | YES      | Documentation  |
+| Graphviz       | any           | NO       | `graphviz`         | `graphviz`     | YES      | Documentation  |
 
 [^] On Debian/Ubuntu `libgtest-dev` only includes sources and headers. You must
 build the library binary manually. This can be done with the following command ```sudo apt-get install libgtest-dev && cd /usr/src/gtest && sudo cmake . && sudo make && sudo mv libg* /usr/lib/ ```