diff --git a/Releases.rst b/Releases.rst
index 0c3e423..c8cf337 100644
--- a/Releases.rst
+++ b/Releases.rst
@@ -91,6 +91,8 @@ documentation
 Bug Fixes
 ---------
 
+- Updated versions of dependencies to avoid bug caused by conflict between them [:issue:`67`]
+
 sora.body
 ^^^^^^^^^^^
 
@@ -104,6 +106,8 @@ sora.ephem
 
 - Added argument "meta" in "EphemHorizons". [:issue:`65`]
 
+- Fixed bug when radius is inputted in the ephem classes. [:issue:`67`]
+
 sora.extra
 ^^^^^^^^^^
 
@@ -127,6 +131,9 @@ sora.occultation
 - Fixed bug that prevented the user to ignore the chord name as labels when
   plotting the chords. [:issue:`66`]
 
+- Fixed bug that prevented Occultation instantiation if the size of the star
+  can not be determined [:issue:`67`]
+
 sora.prediction
 ^^^^^^^^^^^^^^^
 
@@ -134,6 +141,9 @@ sora.prediction
 
 - Fixed MAJOR bug that inverted the shadow velocity in some cases. [:issue:`66`]
 
+- Fixed bug in the occultation map that did not plot the direction arrow in some
+  cases when cartopy>=0.18. [:issue:`67`]
+
 sora.star
 ^^^^^^^^^^^^^^^
 
diff --git a/setup.py b/setup.py
index 4d24ace..ea6de93 100644
--- a/setup.py
+++ b/setup.py
@@ -19,13 +19,13 @@
     url='https://github.com/riogroup/SORA',
     keywords=['science', 'astronomy', 'occultation'],
     install_requires=[
-        'numpy>=1.18',
+        'numpy>=1.21',
         'pyerfa>=2.0',
-        'astropy>=4.0',
-        'astroquery>=0.4.1',
-        'spiceypy>=3.0.2',
-        'matplotlib>=3.2',
-        'scipy>=1.4.1',
+        'astropy>=4.3.1',
+        'astroquery>=0.4.3',
+        'spiceypy>=4.0.2',
+        'matplotlib>=3.4.3',
+        'scipy>=1.7.1',
         'requests',
     ],
     python_requires=">=3.7, <4",
diff --git a/sora/ephem/meta.py b/sora/ephem/meta.py
index 26d8138..26b9d3c 100644
--- a/sora/ephem/meta.py
+++ b/sora/ephem/meta.py
@@ -69,7 +69,7 @@ def radius(self, value):
         if 'radius' in self._shared_with['body']:
             raise AttributeError('When {} is associated to a Body object, radius must be given to the Body'
                                  ' object.'.format(self.__class__.__name__))
-        self._radius = float(value)
+        self._radius = u.Quantity(value, unit=u.km)
 
     @property
     def H(self):
diff --git a/sora/occultation/core.py b/sora/occultation/core.py
index a0f2d32..50b0225 100644
--- a/sora/occultation/core.py
+++ b/sora/occultation/core.py
@@ -97,7 +97,10 @@ def __init__(self, star, body=None, ephem=None, time=None, reference_center='geo
         self.vel = vel  # Shadow velocity at CA
         self.dist = dist  # object distance at CA
         self.tca = tca   # Instant of CA
-        self.star_diam = self.star.apparent_diameter(self.dist, verbose=False)
+        try:
+            self.star_diam = self.star.apparent_diameter(self.dist, verbose=False)
+        except ValueError:
+            self.star_diam = 0*u.km
 
         meta = {
             'name': self.body.name, 'radius': self.body.radius.to(u.km).value,
@@ -111,7 +114,7 @@ def __init__(self, star, body=None, ephem=None, time=None, reference_center='geo
         self.__observations = []
         self._chords = ChordList(star=self.star, body=self._body, time=self.tca)
         self._chords._shared_with['occultation'] = {"vel": np.absolute(self.vel), "dist": float(self.dist.AU),
-                                                    "star_diam": float(self.star_diam.km)}
+                                                    "star_diam": float(self.star_diam.to(u.km).value)}
 
     @property
     def star(self):
diff --git a/sora/prediction/occmap.py b/sora/prediction/occmap.py
index 98b93ed..ed649d3 100644
--- a/sora/prediction/occmap.py
+++ b/sora/prediction/occmap.py
@@ -696,11 +696,21 @@ def plot_occ_map(name, radius, coord, time, ca, pa, vel, dist, mag=0, longi=0, *
     # plots the the direction arrow
     if arrow:
         if limits is None:
-            plt.quiver(5500000, -5500000, (np.sin(paplus+90*u.deg)*np.sign(occs['vel'])).value,
-                       (np.cos(paplus+90*u.deg)*np.sign(occs['vel'])).value, width=0.005)
+            dx = 1000000*(np.sin(paplus+90*u.deg)*np.sign(occs['vel'])).value
+            dy = 1000000*(np.cos(paplus+90*u.deg)*np.sign(occs['vel'])).value
+            plt.annotate('', xy=(5500000+dx, -5500000+dy), xycoords='data',
+                         xytext=(5500000, -5500000), textcoords='data',
+                         arrowprops=dict(facecolor='black', shrink=0.05),
+                         horizontalalignment='right', verticalalignment='top', annotation_clip=False
+                         )
         else:
-            plt.quiver(lx + (ux-lx)*0.9, ly + (uy-ly)*0.1, (np.sin(paplus+90*u.deg)*np.sign(occs['vel'])).value,
-                       (np.cos(paplus+90*u.deg)*np.sign(occs['vel'])).value, width=0.005, zorder=1.3)
+            dx = (1000000/zoom) * (np.sin(paplus + 90 * u.deg) * np.sign(occs['vel'])).value
+            dy = (1000000/zoom) * (np.cos(paplus + 90 * u.deg) * np.sign(occs['vel'])).value
+            plt.annotate('', xy=(lx + (ux-lx)*0.9 + dx, ly + (uy-ly)*0.1 + dy), xycoords='data',
+                         xytext=(lx + (ux-lx)*0.9, ly + (uy-ly)*0.1), textcoords='data',
+                         arrowprops=dict(facecolor='black', shrink=0.05),
+                         horizontalalignment='right', verticalalignment='top', annotation_clip=False
+                         )
 
     # plots the countries names
     for country in countries.keys():
diff --git a/sora/prediction/table.py b/sora/prediction/table.py
index d4ea6c6..dc2e3e4 100644
--- a/sora/prediction/table.py
+++ b/sora/prediction/table.py
@@ -478,7 +478,7 @@ def keep_from_selected_images(self, path='.'):
         """
         itens = []
         for i, tca in enumerate(self['Epoch']):
-            name = '{}_{}'.format(self.meta['name'], tca.isot)
+            name = '{}_{}'.format(self.meta['name'], tca.isot.replace(':', '_'))
             if not glob.glob(os.path.join(path, name)+'*'):
                 itens.append(i)
         self.remove_rows(itens)