diff --git a/README.md b/README.md
index 5c24924..3b3c75f 100644
--- a/README.md
+++ b/README.md
@@ -22,7 +22,7 @@ Gaussian .cube files as well as its own .d2o format.
 Getting the dependencies
 ```
 sudo apt install build-essential cmake libtclap-dev libboost-all-dev libopenvdb-dev libtbb-dev \
-pkg-config libcppunit-dev libeigen3-dev liblzma-dev zlib1g-dev
+pkg-config libcppunit-dev libeigen3-dev liblzma-dev zlib1g-dev libbz2-dev libssl-dev
 ```
 
 To compile, run the following commands:
diff --git a/docs/installation.rst b/docs/installation.rst
index 386e790..72f98b0 100644
--- a/docs/installation.rst
+++ b/docs/installation.rst
@@ -21,6 +21,7 @@ libraries are available to you:
 * `GZIP <https://www.gnu.org/software/gzip/>`_ (gzip data compression)
 * `LZMA <https://7-zip.org/>`_ (lzma data compression)
 * `CPPUnit <https://sourceforge.net/projects/cppunit/>`_ (unit testing)
+* `OpenSSL <https://www.openssl.org/>`_ (unit testing; MD5 checksums)
 
 .. note::
    * The instructions covered in this guide assume you are running a  
@@ -32,7 +33,8 @@ libraries are available to you:
 To ensure that all the packages are installed, one can run the following::
 
     sudo apt install build-essential cmake libtclap-dev libboost-all-dev \ 
-    pkg-config libcppunit-dev libeigen3-dev liblzma-dev zlib1g-dev libbz2-dev
+    pkg-config libcppunit-dev libeigen3-dev liblzma-dev zlib1g-dev libbz2-dev \
+    libssl-dev
 
 Standard compilation
 --------------------