diff --git a/gemd/__version__.py b/gemd/__version__.py
index 0b167e6..edc60b3 100644
--- a/gemd/__version__.py
+++ b/gemd/__version__.py
@@ -1 +1 @@
-__version__ = "2.1.5"
+__version__ = "2.1.6"
diff --git a/gemd/units/citrine_en.txt b/gemd/units/citrine_en.txt
index 764a908..ea19497 100644
--- a/gemd/units/citrine_en.txt
+++ b/gemd/units/citrine_en.txt
@@ -156,6 +156,7 @@ kelvin = [temperature]; offset: 0 = K = Kelvin = degK = °K = degree_Kelvin = de
 radian = [] = rad = Radian
 bit = [] = _ = Bit
 count = [] = _ = Count
+mooney = [mooney] = Mooney  # https://en.wikipedia.org/wiki/Mooney_viscometer
 
 
 #### CONSTANTS ####