diff --git a/HISTORY.rst b/HISTORY.rst
index 6aacc73..2a5eb9a 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -2,6 +2,43 @@
 History
 =======
 
+0.5.5 (2019-05-31)
+------------------
+
+dvhcalc
+~~~~~~~
+- Refactored bounding & resampling set up code to only execute
+  if conditions are met.
+- Fix a bug where the resampled LUT was not calculated
+  correctly for DVH interpolation.
+
+dvh
+~~~
+- Differential DVH calculation modified. `(#60) <https://github.com/dicompyler/dicompyler-core/pull/60>`__ `[Hideki Nakamoto] <https://github.com/inamoto85>`__
+- Fix an issue with D100 not returning 0 Gy. `(#74) <https://github.com/dicompyler/dicompyler-core/pull/74>`__ `[Gabriel Couture] <https://github.com/gacou54>`__
+- Preserve global maximum dose. `(#106) <https://github.com/dicompyler/dicompyler-core/pull/106>`__ `[Akihisa Wakita] <https://github.com/wkt84>`__
+
+dicomparser
+~~~~~~~~~~~
+- Remove the test for existence of `ContourImageSequence` in
+  `GetStructureCoordinates`. `(#81) <https://github.com/dicompyler/dicompyler-core/pull/81>`__ `[Gabriel Couture] <https://github.com/gacou54>`__
+- Utilize integer division when generating a background for
+  an image.
+- Return a string for the patient's name as `PersonName3`
+  cannot be serialized.
+- Fix a bug to return a referenced FoR if the
+  FrameOfReference is blank.
+- Fix a bug in `GetPlan` where the wrong object names were
+  used. `(#43) <https://github.com/dicompyler/dicompyler-core/pull/43>`__ `[gertsikkema] <https://github.com/gertsikkema>`__
+- Ensure that Rx Dose from RT Plan is rounded instead of
+  truncated.
+- Account for holes and bifurcated structures for structure
+  volume calculation.
+- Implement structure volume calculation using Shapely.
+- Fix window calculation if not present in header.
+- Add checks in max, mean, min and dose_constraint for case where counts array is empty or all 0's. `(#96) <https://github.com/dicompyler/dicompyler-core/pull/96>`__ `[Nicolas Galler] <https://github.com/nicocrm>`__
+
+
 0.5.4 (2018-04-02)
 ------------------
 
diff --git a/docs/conf.py b/docs/conf.py
index 5e88fe1..40661eb 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -61,7 +61,7 @@
 
 # General information about the project.
 project = u'dicompyler-core'
-copyright = u'2016-2018, Aditya Panchal'
+copyright = u'2016-2019, Aditya Panchal'
 
 # The version info for the project you're documenting, acts as replacement
 # for |version| and |release|, also used in various other places throughout
diff --git a/setup.py b/setup.py
index 82124af..6907da4 100644
--- a/setup.py
+++ b/setup.py
@@ -64,6 +64,7 @@
         'Programming Language :: Python :: 3',
         'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',
+        'Programming Language :: Python :: 3.7',
         'Topic :: Scientific/Engineering :: Medical Science Apps.',
         'Topic :: Scientific/Engineering :: Physics'
     ],
diff --git a/tox.ini b/tox.ini
index b5700d2..898b19e 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py27, py36
+envlist = py27, py37
 
 [testenv]
 setenv =