diff --git a/requirements.txt b/requirements.txt
index 0df165da37..70b12f4bcc 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -17,5 +17,4 @@ gipc==1.4.0
 
 # GPhL: f90nml, mgen, and py4j are required for GPhL Workflow and emulation
 py4j==0.10.9.5
-mgen==1.2.0
 f90nml==1.4.2
diff --git a/setup.py b/setup.py
index b0c74b083f..75cc27763e 100644
--- a/setup.py
+++ b/setup.py
@@ -28,7 +28,7 @@ def get_requirements(fname):
 )
 setup_requirements = []
 tests_requirements = []
-extras_requirements = {'gphl': ['f90nml', 'py4j', 'mgen']}
+extras_requirements = {'gphl': ['f90nml', 'py4j']}
 console_scripts = []
 gui_scripts = []