depend on mpl-base instead of mpl
@@ -25,7 +25,7 @@ requirements:
- numpy >=1.16.0
- astropy >=4.0
- scipy >=1.4
- - matplotlib >=3.1
+ - matplotlib-base >=3.1
- pyside2 >=5.12
- pypeit ==1.4.2
- pytest >=3.0.7
