diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index 56ecac929..12eb57177 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -1,7 +1,8 @@
 2019-12-29
 	* bump homematicip-0.10.14
 	* bump libpurecool-0.6.0
-	* python-velbus-2.0.32
+	* bump python-velbus-2.0.32
+	* add PsychroLib-2.3.0 (dewpoint calculation)
 
 2019-12-28 homeassistant-0.103.5
 	* bump zeroconf-0.24.3
diff --git a/dev-python/PsychroLib/Manifest b/dev-python/PsychroLib/Manifest
new file mode 100644
index 000000000..834efbb33
--- /dev/null
+++ b/dev-python/PsychroLib/Manifest
@@ -0,0 +1,3 @@
+DIST PsychroLib-2.3.0.zip 9003 BLAKE2B be9f13bfa1f79148027d2a1bceba60f439ee1ffe804c6d0be3a8422d75c8079579c0ef5d6c8b39cc0fd9db5018d7e255290c42cb6560090378454be7594d8a3f SHA512 18bf9478db45f9046c70dece9a75daf5e83a224144cf02c71f7e6694237d94123bfaaa107985a88413dc43b579e80702660c651e8154ce5eec197d9530e15d1f
+EBUILD PsychroLib-2.3.0.ebuild 717 BLAKE2B 4a41a7be9b9da99e5b523b67c7a56df82eeb8203f386749a5ffa8238eb07218623460d0f0dd09265a28c638af7da7d5a8a7374e6e27fdb06f50bd51db6d9f4ef SHA512 4d2ba1cecaa74981e2efe144a5c7f0219eddea74979b808b7143e6547f364a474fd3a88b4160e83d8e981d57d61f341a7f31a296f88753358d66c4b6aa9311e6
+MISC metadata.xml 495 BLAKE2B aefdbd0cc5940f0b53247b88ee0383203a24e2f57b19577b184ff96b68a7e0269f9022509f55a507321af9723890fa694d6b9661dec057bfd63b397239f54229 SHA512 d2d4f884148a3ddd5bbf103f0bfd969308d9f55c40ae838343a1d4aa078f2640dcfadaed47b5dcceebcdf01d3bd73eb6fa6f72d7b3e2c15a593765ccf769daa3
diff --git a/dev-python/PsychroLib/PsychroLib-2.3.0.ebuild b/dev-python/PsychroLib/PsychroLib-2.3.0.ebuild
new file mode 100644
index 000000000..1804be636
--- /dev/null
+++ b/dev-python/PsychroLib/PsychroLib-2.3.0.ebuild
@@ -0,0 +1,30 @@
+# Copyright 1999-2019 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI="7"
+
+PYTHON_COMPAT=( python3_{6,7} )
+
+inherit distutils-r1
+
+DESCRIPTION="Library of psychrometric functions to calculate thermodynamic properties of air"
+HOMEPAGE="https://github.com/psychrometrics/psychrolib https://pypi.org/project/PsychroLib/"
+SRC_URI="mirror://pypi/${P:0:1}/${PN}/${P}.zip"
+
+LICENSE="MIT"
+SLOT="0"
+KEYWORDS="~amd64 ~x86 ~amd64-linux ~x86-linux"
+IUSE="test"
+
+RDEPEND=""
+DEPEND="${REDEPEND}
+	dev-python/setuptools[${PYTHON_USEDEP}]
+	test? (
+		dev-python/nose[${PYTHON_USEDEP}]
+		dev-python/pytest[${PYTHON_USEDEP}]
+	)"
+
+python_test() {
+	nosetests --verbose || die
+	py.test -v -v || die
+}
diff --git a/dev-python/PsychroLib/metadata.xml b/dev-python/PsychroLib/metadata.xml
new file mode 100644
index 000000000..e790e0828
--- /dev/null
+++ b/dev-python/PsychroLib/metadata.xml
@@ -0,0 +1,16 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+  <maintainer>
+    <email>b@edevau.net</email>
+    <name>Andreas Billmeier</name>
+  </maintainer>
+  <herd>python</herd>
+  <upstream>
+    <remote-id type="pypi">PsychroLib</remote-id>
+    <maintainer status="unknown">
+      <email>didierthevenard@users.noreply.github.com</email>
+      <name>The PsychroLib Developers</name>
+    </maintainer>
+  </upstream>
+</pkgmetadata>