diff --git a/rcpchgrowth_python_cli/__main__.py b/rcpchgrowth_python_cli/__main__.py
index c94f59f..bf34bb4 100644
--- a/rcpchgrowth_python_cli/__main__.py
+++ b/rcpchgrowth_python_cli/__main__.py
@@ -51,7 +51,6 @@ def age_calculation (birth_date, observation_date, gestation_weeks, gestation_da
             birth_date=birth_date,
             observation_date=observation_date)
         click.echo(f"Unadjusted: {decimal_age} y,\n{calendar_age}")
-    
 
 @click.command()
 @click.argument('decimal_age', type=click.FLOAT)
@@ -154,7 +153,7 @@ def measurement_for_sds(reference, decimal_age, sex, measurement_method, sds):
 @click.argument("maternal_height", type=click.FLOAT)
 @click.argument("paternal_height", type=click.FLOAT)
 @click.argument('sex', default="male", type=click.Choice(['male', 'female'], case_sensitive=True))
-def midparental_height(maternal_height: float, paternal_height: float, sex: str)->str:
+def midparental_height(maternal_height: float, paternal_height: float, sex: str):
     """
     Returns a midparental height
     Parameters include paternal_height in cm, maternal_height in cm and sex as one of 'male' or 'female' (default 'male').
@@ -170,12 +169,15 @@ def midparental_height(maternal_height: float, paternal_height: float, sex: str)
         return f"Error: {e}"
     click.echo(f"Midparental height: {round(result, 2)} cm")
 
+
 fig = pyfiglet.Figlet(font="standard")
 click.echo(fig.renderText("RCPCHGrowth"))
 methods.add_command(age_calculation)
 methods.add_command(sds_for_measurement)
 methods.add_command(measurement_for_centile)
 methods.add_command(measurement_for_sds)
+methods.add_command(midparental_height)
+
 
 if __name__ == '__main__':
     methods()
diff --git a/requirements.txt b/requirements.txt
index f0ff3c1..375d696 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,6 @@
 attrs==20.3.0
 click==8.0.1
 iniconfig==1.1.1
-marshmallow==3.11.1
 numpy==1.20.2
 packaging==20.9
 pluggy==0.13.1
diff --git a/setup.py b/setup.py
index b4b6417..472d507 100644
--- a/setup.py
+++ b/setup.py
@@ -9,7 +9,7 @@
   
 setup(
         name ='rcpchgrowth-python-cli',
-        version='1.1.1',
+        version='1.1.2',
         author ='Simon Chapman',
         author_email ='eatyourpeasapps@gmail.com',
         url ='https://github.com/rcpch/rcpchgrowth-python-cli',
@@ -19,7 +19,7 @@
         packages=find_packages(),
         entry_points ={
             'console_scripts': [
-                'rcpchgrowth = rcpchgrowth_python_cli.__main__:methods'
+                'rcpchgrowth=rcpchgrowth_python_cli.__main__:methods'
             ]
         },
         classifiers =(