diff --git a/actions/upgrades b/actions/upgrades
index 66c72463e..36c6cb945 100755
--- a/actions/upgrades
+++ b/actions/upgrades
@@ -345,6 +345,13 @@ def _check_and_dist_upgrade(develop=False, test_upgrade=False):
               'not set.')
         return
 
+    output = subprocess.check_output(['df', '--output=avail,pcent', '/'])
+    output = output.decode().split('\n')[1].split()
+    free_space, free_percent = int(output[0]), int(output[1][:-1])
+    if free_space < 1000000 or free_percent < 10:
+        print('Not enough free space in /.')
+        return
+
     print(f'Upgrading from {dist} to {codename}...')
     if check_dist == 'testing':
         with open(SOURCES_LIST, 'r') as sources_list: