diff --git a/Pipfile b/Pipfile
index 4a9e2b8..564be8f 100644
--- a/Pipfile
+++ b/Pipfile
@@ -10,7 +10,7 @@ numpy = "==1.21.4"
 [dev-packages]
 pytest = "==6.2.5"
 pylint = "==2.11.1"
-black = "==21.9b0"
+black = "==21.10b0"
 isort = "==5.9.3"
 pytest-pylint = "==0.18.0"
 twine = "*"
diff --git a/Pipfile.lock b/Pipfile.lock
index 23f587c..ee28679 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "a49db88a35758611c83dee291728f645a094bf35bcfa02bae2691fb0aae5bd92"
+            "sha256": "bea236a60c889513aa82fe889a5791dee09f0e5cffcb5cab34991ea7412d7323"
         },
         "pipfile-spec": 6,
         "requires": {
@@ -125,11 +125,11 @@
         },
         "black": {
             "hashes": [
-                "sha256:380f1b5da05e5a1429225676655dddb96f5ae8c75bdf91e53d798871b902a115",
-                "sha256:7de4cfc7eb6b710de325712d40125689101d21d25283eed7e9998722cf10eb91"
+                "sha256:6eb7448da9143ee65b856a5f3676b7dda98ad9abe0f87fce8c59291f15e82a5b",
+                "sha256:a9952229092e325fe5f3dae56d81f639b23f7131eb840781947e4b2886030f33"
             ],
             "index": "pypi",
-            "version": "==21.9b0"
+            "version": "==21.10b0"
         },
         "bleach": {
             "hashes": [
@@ -396,11 +396,11 @@
         },
         "pycparser": {
             "hashes": [
-                "sha256:2d475327684562c3a96cc71adf7dc8c4f0565175cf86b6d7a404ff4c771f15f0",
-                "sha256:7582ad22678f0fcd81102833f60ef8d0e57288b6b5fb00323d101be910e35705"
+                "sha256:8ee45429555515e1f6b185e78100aea234072576aa43ab53aefcae078162fca9",
+                "sha256:e644fdec12f7872f86c58ff790da456218b10f863970249516d60a5eaca77206"
             ],
             "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
-            "version": "==2.20"
+            "version": "==2.21"
         },
         "pygments": {
             "hashes": [
@@ -587,7 +587,7 @@
                 "sha256:4987c65554f7a2dbf30c18fd48778ef124af6fab771a377103da0585e2336ece",
                 "sha256:c4fdf4019605b6e5423637e01bc9fe4daef873709a7973e195ceba0a62bbc844"
             ],
-            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4' and python_version < '4.0'",
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4' and python_version < '4'",
             "version": "==1.26.7"
         },
         "webencodings": {