diff --git a/connpy/_version.py b/connpy/_version.py
index f695191..2eced4a 100644
--- a/connpy/_version.py
+++ b/connpy/_version.py
@@ -1,2 +1,2 @@
-__version__ = "2.1.4"
+__version__ = "2.1.5"
 
diff --git a/connpy/core.py b/connpy/core.py
index d3713dd..23366fc 100755
--- a/connpy/core.py
+++ b/connpy/core.py
@@ -139,11 +139,8 @@ class node:
         t = t.replace("\a","")
         t = t.replace('\n\n', '\n')
         t = re.sub(r'.\[K', '', t)
-        while True:
-            tb = re.sub('.\b', '', t, count=1)
-            if len(t) == len(tb):
-                break
-            t = tb
+        while t.find("\b") != -1:
+            t = re.sub('[^\b]\b', '', t)
         ansi_escape = re.compile(r'\x1B(?:[@-Z\\-_]|\[[0-?]*[ -/ ]*[@-~])')
         t = ansi_escape.sub('', t)
         t = t.lstrip(" \n\r")
diff --git a/docs/connpy/index.html b/docs/connpy/index.html
index c00e6f5..d3afaf4 100644
--- a/docs/connpy/index.html
+++ b/docs/connpy/index.html
@@ -2005,11 +2005,8 @@ tasks:
         t = t.replace("\a","")
         t = t.replace('\n\n', '\n')
         t = re.sub(r'.\[K', '', t)
-        while True:
-            tb = re.sub('.\b', '', t, count=1)
-            if len(t) == len(tb):
-                break
-            t = tb
+        while t.find("\b") != -1:
+            t = re.sub('[^\b]\b', '', t)
         ansi_escape = re.compile(r'\x1B(?:[@-Z\\-_]|\[[0-?]*[ -/ ]*[@-~])')
         t = ansi_escape.sub('', t)
         t = t.lstrip(" \n\r")
diff --git a/requirements.txt b/requirements.txt
index d75146d..87c12c9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,6 @@
 inquirer~=2.9.2
 pexpect~=4.8.0
-pycryptodome~=3.14.1
+pycryptodome~=3.15.0
 pyfzf~=0.3.1
-setuptools~=59.5.0
+PyYAML~=6.0
+setuptools~=61.3.1