diff --git a/eris/__main__.py b/eris/__main__.py
index 1a68ec8..5c580f2 100755
--- a/eris/__main__.py
+++ b/eris/__main__.py
@@ -34,10 +34,10 @@ import time
 import docopt
 import pygments.styles
 import pyinotify
-import sortedcontainers
 
 import eris
 from eris import fill3
+from eris import sorted_collection
 from eris import terminal
 from eris import termstr
 from eris import tools
@@ -223,7 +223,7 @@ class Summary:
         self.is_loaded = False
         self.closest_placeholder_generator = None
         sort_func = directory_sort if self.is_directory_sort else type_sort
-        self._entries = sortedcontainers.SortedList([], key=sort_func)
+        self._entries = sorted_collection.SortedCollection([], key=sort_func)
 
     def __getstate__(self):
         state = self.__dict__.copy()
@@ -261,7 +261,7 @@ class Summary:
 
     def sort_entries(self):
         key_func = directory_sort if self.is_directory_sort else type_sort
-        self._entries = sortedcontainers.SortedList(
+        self._entries = sorted_collection.SortedCollection(
             self._entries, key=key_func)
         self.closest_placeholder_generator = None
 
@@ -275,7 +275,7 @@ class Summary:
         Entry.MAX_WIDTH = max(len(entry), Entry.MAX_WIDTH)
         self._max_path_length = max(len(entry.path) - len("./"),
                                     self._max_path_length)
-        self._entries.add(entry)
+        self._entries.insert(entry)
         entry_index = self._entries.index(entry)
         x, y = self._cursor_position
         if entry_index <= y:
@@ -310,7 +310,8 @@ class Summary:
             self.result_total -= 1
             result.delete()
         row = self._entries[index]
-        self._entries.pop(index)
+        del self._entries._keys[index]
+        del self._entries._items[index]
         if len(row) == Entry.MAX_WIDTH:
             Entry.MAX_WIDTH = max((len(entry) for entry in self._entries),
                                   default=0)
diff --git a/eris/sorted_collection.py b/eris/sorted_collection.py
new file mode 100644
index 0000000..2cc6103
--- /dev/null
+++ b/eris/sorted_collection.py
@@ -0,0 +1,335 @@
+
+# From https://code.activestate.com/recipes/577197-sortedcollection/
+
+# Copyright (c) 2010 Raymond Hettinger
+
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+
+from bisect import bisect_left, bisect_right
+
+class SortedCollection(object):
+    '''Sequence sorted by a key function.
+
+    SortedCollection() is much easier to work with than using bisect() directly.
+    It supports key functions like those use in sorted(), min(), and max().
+    The result of the key function call is saved so that keys can be searched
+    efficiently.
+
+    Instead of returning an insertion-point which can be hard to interpret, the
+    five find-methods return a specific item in the sequence. They can scan for
+    exact matches, the last item less-than-or-equal to a key, or the first item
+    greater-than-or-equal to a key.
+
+    Once found, an item's ordinal position can be located with the index() method.
+    New items can be added with the insert() and insert_right() methods.
+    Old items can be deleted with the remove() method.
+
+    The usual sequence methods are provided to support indexing, slicing,
+    length lookup, clearing, copying, forward and reverse iteration, contains
+    checking, item counts, item removal, and a nice looking repr.
+
+    Finding and indexing are O(log n) operations while iteration and insertion
+    are O(n).  The initial sort is O(n log n).
+
+    The key function is stored in the 'key' attibute for easy introspection or
+    so that you can assign a new key function (triggering an automatic re-sort).
+
+    In short, the class was designed to handle all of the common use cases for
+    bisect but with a simpler API and support for key functions.
+
+    >>> from pprint import pprint
+    >>> from operator import itemgetter
+
+    >>> s = SortedCollection(key=itemgetter(2))
+    >>> for record in [
+    ...         ('roger', 'young', 30),
+    ...         ('angela', 'jones', 28),
+    ...         ('bill', 'smith', 22),
+    ...         ('david', 'thomas', 32)]:
+    ...     s.insert(record)
+
+    >>> pprint(list(s))         # show records sorted by age
+    [('bill', 'smith', 22),
+     ('angela', 'jones', 28),
+     ('roger', 'young', 30),
+     ('david', 'thomas', 32)]
+
+    >>> s.find_le(29)           # find oldest person aged 29 or younger
+    ('angela', 'jones', 28)
+    >>> s.find_lt(28)           # find oldest person under 28
+    ('bill', 'smith', 22)
+    >>> s.find_gt(28)           # find youngest person over 28
+    ('roger', 'young', 30)
+
+    >>> r = s.find_ge(32)       # find youngest person aged 32 or older
+    >>> s.index(r)              # get the index of their record
+    3
+    >>> s[3]                    # fetch the record at that index
+    ('david', 'thomas', 32)
+
+    >>> s.key = itemgetter(0)   # now sort by first name
+    >>> pprint(list(s))
+    [('angela', 'jones', 28),
+     ('bill', 'smith', 22),
+     ('david', 'thomas', 32),
+     ('roger', 'young', 30)]
+
+    '''
+
+    def __init__(self, iterable=(), key=None):
+        self._given_key = key
+        key = (lambda x: x) if key is None else key
+        decorated = sorted((key(item), item) for item in iterable)
+        self._keys = [k for k, item in decorated]
+        self._items = [item for k, item in decorated]
+        self._key = key
+
+    def _getkey(self):
+        return self._key
+
+    def _setkey(self, key):
+        if key is not self._key:
+            self.__init__(self._items, key=key)
+
+    def _delkey(self):
+        self._setkey(None)
+
+    key = property(_getkey, _setkey, _delkey, 'key function')
+
+    def clear(self):
+        self.__init__([], self._key)
+
+    def copy(self):
+        return self.__class__(self, self._key)
+
+    def __len__(self):
+        return len(self._items)
+
+    def __getitem__(self, i):
+        return self._items[i]
+
+    def __iter__(self):
+        return iter(self._items)
+
+    def __reversed__(self):
+        return reversed(self._items)
+
+    def __repr__(self):
+        return '%s(%r, key=%s)' % (
+            self.__class__.__name__,
+            self._items,
+            getattr(self._given_key, '__name__', repr(self._given_key))
+        )
+
+    def __reduce__(self):
+        return self.__class__, (self._items, self._given_key)
+
+    def __contains__(self, item):
+        k = self._key(item)
+        i = bisect_left(self._keys, k)
+        j = bisect_right(self._keys, k)
+        return item in self._items[i:j]
+
+    def index(self, item):
+        'Find the position of an item.  Raise ValueError if not found.'
+        k = self._key(item)
+        i = bisect_left(self._keys, k)
+        j = bisect_right(self._keys, k)
+        return self._items[i:j].index(item) + i
+
+    def count(self, item):
+        'Return number of occurrences of item'
+        k = self._key(item)
+        i = bisect_left(self._keys, k)
+        j = bisect_right(self._keys, k)
+        return self._items[i:j].count(item)
+
+    def insert(self, item):
+        'Insert a new item.  If equal keys are found, add to the left'
+        k = self._key(item)
+        i = bisect_left(self._keys, k)
+        self._keys.insert(i, k)
+        self._items.insert(i, item)
+
+    def insert_right(self, item):
+        'Insert a new item.  If equal keys are found, add to the right'
+        k = self._key(item)
+        i = bisect_right(self._keys, k)
+        self._keys.insert(i, k)
+        self._items.insert(i, item)
+
+    def remove(self, item):
+        'Remove first occurence of item.  Raise ValueError if not found'
+        i = self.index(item)
+        del self._keys[i]
+        del self._items[i]
+
+    def find(self, k):
+        'Return first item with a key == k.  Raise ValueError if not found.'
+        i = bisect_left(self._keys, k)
+        if i != len(self) and self._keys[i] == k:
+            return self._items[i]
+        raise ValueError('No item found with key equal to: %r' % (k,))
+
+    def find_le(self, k):
+        'Return last item with a key <= k.  Raise ValueError if not found.'
+        i = bisect_right(self._keys, k)
+        if i:
+            return self._items[i-1]
+        raise ValueError('No item found with key at or below: %r' % (k,))
+
+    def find_lt(self, k):
+        'Return last item with a key < k.  Raise ValueError if not found.'
+        i = bisect_left(self._keys, k)
+        if i:
+            return self._items[i-1]
+        raise ValueError('No item found with key below: %r' % (k,))
+
+    def find_ge(self, k):
+        'Return first item with a key >= equal to k.  Raise ValueError if not found'
+        i = bisect_left(self._keys, k)
+        if i != len(self):
+            return self._items[i]
+        raise ValueError('No item found with key at or above: %r' % (k,))
+
+    def find_gt(self, k):
+        'Return first item with a key > k.  Raise ValueError if not found'
+        i = bisect_right(self._keys, k)
+        if i != len(self):
+            return self._items[i]
+        raise ValueError('No item found with key above: %r' % (k,))
+
+
+# ---------------------------  Simple demo and tests  -------------------------
+if __name__ == '__main__':
+
+    def ve2no(f, *args):
+        'Convert ValueError result to -1'
+        try:
+            return f(*args)
+        except ValueError:
+            return -1
+
+    def slow_index(seq, k):
+        'Location of match or -1 if not found'
+        for i, item in enumerate(seq):
+            if item == k:
+                return i
+        return -1
+
+    def slow_find(seq, k):
+        'First item with a key equal to k. -1 if not found'
+        for item in seq:
+            if item == k:
+                return item
+        return -1
+
+    def slow_find_le(seq, k):
+        'Last item with a key less-than or equal to k.'
+        for item in reversed(seq):
+            if item <= k:
+                return item
+        return -1
+
+    def slow_find_lt(seq, k):
+        'Last item with a key less-than k.'
+        for item in reversed(seq):
+            if item < k:
+                return item
+        return -1
+
+    def slow_find_ge(seq, k):
+        'First item with a key-value greater-than or equal to k.'
+        for item in seq:
+            if item >= k:
+                return item
+        return -1
+
+    def slow_find_gt(seq, k):
+        'First item with a key-value greater-than or equal to k.'
+        for item in seq:
+            if item > k:
+                return item
+        return -1
+
+    from random import choice
+    pool = [1.5, 2, 2.0, 3, 3.0, 3.5, 4, 4.0, 4.5]
+    for i in range(500):
+        for n in range(6):
+            s = [choice(pool) for i in range(n)]
+            sc = SortedCollection(s)
+            s.sort()
+            for probe in pool:
+                assert repr(ve2no(sc.index, probe)) == repr(slow_index(s, probe))
+                assert repr(ve2no(sc.find, probe)) == repr(slow_find(s, probe))
+                assert repr(ve2no(sc.find_le, probe)) == repr(slow_find_le(s, probe))
+                assert repr(ve2no(sc.find_lt, probe)) == repr(slow_find_lt(s, probe))
+                assert repr(ve2no(sc.find_ge, probe)) == repr(slow_find_ge(s, probe))
+                assert repr(ve2no(sc.find_gt, probe)) == repr(slow_find_gt(s, probe))
+            for i, item in enumerate(s):
+                assert repr(item) == repr(sc[i])        # test __getitem__
+                assert item in sc                       # test __contains__ and __iter__
+                assert s.count(item) == sc.count(item)  # test count()
+            assert len(sc) == n                         # test __len__
+            assert list(map(repr, reversed(sc))) == list(map(repr, reversed(s)))    # test __reversed__
+            assert list(sc.copy()) == list(sc)          # test copy()
+            sc.clear()                                  # test clear()
+            assert len(sc) == 0
+
+    sd = SortedCollection('The quick Brown Fox jumped'.split(), key=str.lower)
+    assert sd._keys == ['brown', 'fox', 'jumped', 'quick', 'the']
+    assert sd._items == ['Brown', 'Fox', 'jumped', 'quick', 'The']
+    assert sd._key == str.lower
+    assert repr(sd) == "SortedCollection(['Brown', 'Fox', 'jumped', 'quick', 'The'], key=lower)"
+    sd.key = str.upper
+    assert sd._key == str.upper
+    assert len(sd) == 5
+    assert list(reversed(sd)) == ['The', 'quick', 'jumped', 'Fox', 'Brown']
+    for item in sd:
+        assert item in sd
+    for i, item in enumerate(sd):
+        assert item == sd[i]
+    sd.insert('jUmPeD')
+    sd.insert_right('QuIcK')
+    assert sd._keys ==['BROWN', 'FOX', 'JUMPED', 'JUMPED', 'QUICK', 'QUICK', 'THE']
+    assert sd._items == ['Brown', 'Fox', 'jUmPeD', 'jumped', 'quick', 'QuIcK', 'The']
+    assert sd.find_le('JUMPED') == 'jumped', sd.find_le('JUMPED')
+    assert sd.find_ge('JUMPED') == 'jUmPeD'
+    assert sd.find_le('GOAT') == 'Fox'
+    assert sd.find_ge('GOAT') == 'jUmPeD'
+    assert sd.find('FOX') == 'Fox'
+    assert sd[3] == 'jumped'
+    assert sd[3:5] ==['jumped', 'quick']
+    assert sd[-2] == 'QuIcK'
+    assert sd[-4:-2] == ['jumped', 'quick']
+    for i, item in enumerate(sd):
+        assert sd.index(item) == i
+    try:
+        sd.index('xyzpdq')
+    except ValueError:
+        pass
+    else:
+        assert 0, 'Oops, failed to notify of missing value'
+    sd.remove('jumped')
+    assert list(sd) == ['Brown', 'Fox', 'jUmPeD', 'quick', 'QuIcK', 'The']
+
+    import doctest
+    from operator import itemgetter
+    print(doctest.testmod())
diff --git a/install-dependencies b/install-dependencies
index ee54738..521eb76 100755
--- a/install-dependencies
+++ b/install-dependencies
@@ -10,7 +10,7 @@ if [ $DIST_ID != "ubuntu" ]; then
     exit 1
 fi
 echo "Installing the dependencies of the eris script…"
-sudo apt --yes install python3-pip python3.8 util-linux python3-sortedcontainers
+sudo apt --yes install python3-pip python3.8 util-linux
 python3.8 -m pip install pyinotify pygments docopt pillow toml
 echo
 echo "Installing all the tools eris may need…"