diff --git a/setup.py b/setup.py
index aa0fa41d..c325e16b 100644
--- a/setup.py
+++ b/setup.py
@@ -496,16 +496,13 @@ def add(self, source_file, dependency_mod_time=0.0):
 ext_modules = [SnapPyC, SnapPyHP, TwisterCore]
 
 install_requires = ['plink>=2.4.2', 'spherogram>=2.2', 'FXrays>=1.3',
-                    'snappy_manifolds>=1.2', 'low_index>=1.2',
+                    'snappy_manifolds>=1.2.1', 'low_index>=1.2',
                     'pypng', 'decorator', 'packaging', 'tkinter-gl>=1.0a3']
 try:
     import sage
 except ImportError:
     install_requires.append('cypari>=2.3')
-    if sys.platform == 'win32':
-        install_requires.append('ipython>=5.0') # circa 2016
-    else:
-        install_requires.append('ipython>=1.0')
+    install_requires.append('ipython>=5.0')
 
 if CyOpenGL_has_headers:
     ext_modules.append(CyOpenGL)