diff --git a/Pipfile.lock b/Pipfile.lock
index 6a7a3ea..fe13305 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -70,34 +70,40 @@
         },
         "pyqt5-sip": {
             "hashes": [
-                "sha256:0a34b6596bdd28d52da3a51fa8d9bb0b287bcb605c2512aa3251b9028cc71f4d",
-                "sha256:1d65ce08a56282fb0273dd06585b8927b88d4fba71c01a54f8e2ac87ac1ed387",
-                "sha256:224e2fbb7088595940c348d168a317caa2110cbb7a5b957a8c3fc0d9296ee069",
-                "sha256:2a1153cda63f2632d3d5698f0cf29f6b1f1d5162305dc6f5b23336ad8f1039ed",
-                "sha256:2a2239d16a49ce6eaf10166a84424543111f8ebe49d3c124d02af91b01a58425",
-                "sha256:58eae636e0b1926cddec98a703319a47f671cef07d73aaa525ba421cd4adfeb5",
-                "sha256:5c19c4ad67af087e8f4411da7422391b236b941f5f0697f615c5816455d1355d",
-                "sha256:61aa60fb848d740581646603a12c2dcb8d7c4cbd2a9c476a1c891ec360ff0b87",
-                "sha256:8d9f4dc7dbae9783c5dafd66801875a2ebf9302c3addd5739f772285c1c1e91c",
-                "sha256:94c80677b1e8c92fa080e24045d54ace5e4343c4ee6d0216675cd91d6f8e122a",
-                "sha256:9b69db29571dde679908fb237784a8e7af4a2cbf1b7bb25bdb86e487210e04d2",
-                "sha256:9ef12754021bcc1246f97e00ea62b5594dd5c61192830639ab4a1640bd4b7940",
-                "sha256:b1bbe763d431d26f9565cba3e99866768761366ab6d609d2506d194882156fa7",
-                "sha256:d7b8a8f89385ad9e3da38e0123c22c0efc18005e0e2731b6b95e4c21db2049d2",
-                "sha256:e6254647fa35e1260282aeb9c32a3dd363287b9a1ffcc4f22bd27e54178e92e4",
-                "sha256:f4c294bfaf2be8004583266d4621bfd3a387e12946f548f966a7fbec91845f1b",
-                "sha256:fa3d70f370604efc67085849d3d1d3d2109faa716c520faf601d15845df64de6"
+                "sha256:055581c6fed44ba4302b70eeb82e979ff70400037358908f251cd85cbb3dbd93",
+                "sha256:0fc9aefacf502696710b36cdc9fa2a61487f55ee883dbcf2c2a6477e261546f7",
+                "sha256:42274a501ab4806d2c31659170db14c282b8313d2255458064666d9e70d96206",
+                "sha256:4347bd81d30c8e3181e553b3734f91658cfbdd8f1a19f254777f906870974e6d",
+                "sha256:485972daff2fb0311013f471998f8ec8262ea381bded244f9d14edaad5f54271",
+                "sha256:4f8e05fe01d54275877c59018d8e82dcdd0bc5696053a8b830eecea3ce806121",
+                "sha256:69a3ad4259172e2b1aa9060de211efac39ddd734a517b1924d9c6c0cc4f55f96",
+                "sha256:6a8701892a01a5a2a4720872361197cc80fdd5f49c8482d488ddf38c9c84f055",
+                "sha256:6d5bca2fc222d58e8093ee8a81a6e3437067bb22bc3f86d06ec8be721e15e90a",
+                "sha256:83c3220b1ca36eb8623ba2eb3766637b19eb0ce9f42336ad8253656d32750c0a",
+                "sha256:a25b9843c7da6a1608f310879c38e6434331aab1dc2fe6cb65c14f1ecf33780e",
+                "sha256:ac57d796c78117eb39edd1d1d1aea90354651efac9d3590aac67fa4983f99f1f",
+                "sha256:b09f4cd36a4831229fb77c424d89635fa937d97765ec90685e2f257e56a2685a",
+                "sha256:c446971c360a0a1030282a69375a08c78e8a61d568bfd6dab3dcc5cf8817f644",
+                "sha256:c5216403d4d8d857ec4a61f631d3945e44fa248aa2415e9ee9369ab7c8a4d0c7",
+                "sha256:d3e4489d7c2b0ece9d203ae66e573939f7f60d4d29e089c9f11daa17cfeaae32",
+                "sha256:d59af63120d1475b2bf94fe8062610720a9be1e8940ea146c7f42bb449d49067",
+                "sha256:d85002238b5180bce4b245c13d6face848faa1a7a9e5c6e292025004f2fd619a",
+                "sha256:d8b2bdff7bbf45bc975c113a03b14fd669dc0c73e1327f02706666a7dd51a197",
+                "sha256:dd05c768c2b55ffe56a9d49ce6cc77cdf3d53dbfad935258a9e347cbfd9a5850",
+                "sha256:fc43f2d7c438517ee33e929e8ae77132749c15909afab6aeece5fcf4147ffdb5"
             ],
-            "version": "==12.8.0"
+            "markers": "python_version >= '3.5'",
+            "version": "==12.9.0"
         }
     },
     "develop": {
         "attrs": {
             "hashes": [
-                "sha256:08a96c641c3a74e44eb59afb61a24f2cb9f4d7188748e76ba4bb5edfa3cb7d1c",
-                "sha256:f7b7ce16570fe9965acd6d30101a28f62fb4a7f9e926b3bbc9b61f8b04247e72"
+                "sha256:2d27e3784d7a565d36ab851fe94887c5eccd6a463168875832a1be79c82828b4",
+                "sha256:626ba8234211db98e869df76230a137c4c40a12d72445c45d5f5b716f076e2fd"
             ],
-            "version": "==19.3.0"
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'",
+            "version": "==21.4.0"
         },
         "backcall": {
             "hashes": [
@@ -108,66 +114,65 @@
         },
         "decorator": {
             "hashes": [
-                "sha256:41fa54c2a0cc4ba648be4fd43cff00aedf5b9465c9bf18d64325bc225f08f760",
-                "sha256:e3a62f0520172440ca0dcc823749319382e377f37f140a0b99ef45fecb84bfe7"
+                "sha256:637996211036b6385ef91435e4fae22989472f9d571faba8927ba8253acbc330",
+                "sha256:b8c3f85900b9dc423225913c5aace94729fe1fa9763b38939a95226f02d37186"
             ],
-            "version": "==4.4.2"
+            "markers": "python_version >= '3.5'",
+            "version": "==5.1.1"
         },
         "importlib-metadata": {
             "hashes": [
-                "sha256:90bb658cdbbf6d1735b6341ce708fc7024a3e14e99ffdc5783edea9f9b077f83",
-                "sha256:dc15b2969b4ce36305c51eebe62d418ac7791e9a157911d58bfb1f9ccd8e2070"
+                "sha256:899e2a40a8c4a1aec681feef45733de8a6c58f3f6a0dbed2eb6574b4387a77b6",
+                "sha256:951f0d8a5b7260e9db5e41d429285b5f451e928479f19d80818878527d36e95e"
             ],
             "markers": "python_version < '3.8'",
-            "version": "==1.7.0"
+            "version": "==4.10.1"
         },
         "iniconfig": {
             "hashes": [
-                "sha256:aa0b40f50a00e72323cb5d41302f9c6165728fd764ac8822aa3fff00a40d56b4"
+                "sha256:011e24c64b7f47f6ebd835bb12a743f2fbe9a26d4cecaa7f53bc4f35ee9da8b3",
+                "sha256:bc3af051d7d14b2ee5ef9969666def0cd1a000e121eaea580d4a313df4b37f32"
             ],
-            "version": "==1.0.0"
+            "version": "==1.1.1"
         },
         "ipython": {
             "hashes": [
-                "sha256:2dbcc8c27ca7d3cfe4fcdff7f45b27f9a8d3edfa70ff8024a71c7a8eb5f09d64",
-                "sha256:9f4fcb31d3b2c533333893b9172264e4821c1ac91839500f31bd43f2c59b3ccf"
+                "sha256:5ac47dc9af66fc2f5530c12069390877ae372ac905edca75a92a6e363b5d7caa",
+                "sha256:c0427ed8bc33ac481faf9d3acf7e84e0010cdaada945e0badd1e2e74cc075833"
             ],
             "index": "pypi",
-            "version": "==7.16.1"
-        },
-        "ipython-genutils": {
-            "hashes": [
-                "sha256:72dd37233799e619666c9f639a9da83c34013a73e8bbc79a7a6348d93c61fab8",
-                "sha256:eb2e116e75ecef9d4d228fdc66af54269afa26ab4463042e33785b887c628ba8"
-            ],
-            "version": "==0.2.0"
+            "version": "==7.16.3"
         },
         "jedi": {
             "hashes": [
                 "sha256:86ed7d9b750603e4ba582ea8edc678657fb4007894a12bcf6f4bb97892f31d20",
                 "sha256:98cc583fa0f2f8304968199b01b6b4b94f469a1f4a74c1560506ca2a211378b5"
             ],
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'",
             "version": "==0.17.2"
         },
         "more-itertools": {
             "hashes": [
-                "sha256:68c70cc7167bdf5c7c9d8f6954a7837089c6a36bf565383919bb595efb8a17e5",
-                "sha256:b78134b2063dd214000685165d81c154522c3ee0a1c0d4d113c80361c234c5a2"
+                "sha256:43e6dd9942dffd72661a2c4ef383ad7da1e6a3e968a927ad7a6083ab410a688b",
+                "sha256:7dc6ad46f05f545f900dd59e8dfb4e84a4827b97b3cfecb175ea0c7d247f6064"
             ],
-            "version": "==8.4.0"
+            "markers": "python_version >= '3.5'",
+            "version": "==8.12.0"
         },
         "packaging": {
             "hashes": [
-                "sha256:4357f74f47b9c12db93624a82154e9b120fa8293699949152b22065d556079f8",
-                "sha256:998416ba6962ae7fbd6596850b80e17859a5753ba17c32284f67bfff33784181"
+                "sha256:dd47c42927d89ab911e606518907cc2d3a1f38bbd026385970643f9c5b8ecfeb",
+                "sha256:ef103e05f519cdc783ae24ea4e2e0f508a9c99b2d4969652eed6a2e1ea5bd522"
             ],
-            "version": "==20.4"
+            "markers": "python_version >= '3.6'",
+            "version": "==21.3"
         },
         "parso": {
             "hashes": [
                 "sha256:97218d9159b2520ff45eb78028ba8b50d2bc61dcc062a9682666f2dc4bd331ea",
                 "sha256:caba44724b994a8a5e086460bb212abc5a8bc46951bf4a9a1210745953622eb9"
             ],
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
             "version": "==0.7.1"
         },
         "pexpect": {
@@ -190,42 +195,47 @@
                 "sha256:15b2acde666561e1298d71b523007ed7364de07029219b604cf808bfa1c765b0",
                 "sha256:966c145cd83c96502c3c3868f50408687b38434af77734af1e9ca461a4081d2d"
             ],
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
             "version": "==0.13.1"
         },
         "prompt-toolkit": {
             "hashes": [
-                "sha256:563d1a4140b63ff9dd587bda9557cffb2fe73650205ab6f4383092fb882e7dc8",
-                "sha256:df7e9e63aea609b1da3a65641ceaf5bc7d05e0a04de5bd45d05dbeffbabf9e04"
+                "sha256:1bb05628c7d87b645974a1bad3f17612be0c29fa39af9f7688030163f680bad6",
+                "sha256:e56f2ff799bacecd3e88165b1e2f5ebf9bcd59e80e06d395fa0cc4b8bd7bb506"
             ],
-            "version": "==3.0.5"
+            "markers": "python_full_version >= '3.6.2'",
+            "version": "==3.0.24"
         },
         "ptyprocess": {
             "hashes": [
-                "sha256:923f299cc5ad920c68f2bc0bc98b75b9f838b93b599941a6b63ddbc2476394c0",
-                "sha256:d7cc528d76e76342423ca640335bd3633420dc1366f258cb31d05e865ef5ca1f"
+                "sha256:4b41f3967fce3af57cc7e94b888626c18bf37a083e3651ca8feeb66d492fef35",
+                "sha256:5c5d0a3b48ceee0b48485e0c26037c0acd7d29765ca3fbb5cb3831d347423220"
             ],
-            "version": "==0.6.0"
+            "version": "==0.7.0"
         },
         "py": {
             "hashes": [
-                "sha256:366389d1db726cd2fcfc79732e75410e5fe4d31db13692115529d34069a043c2",
-                "sha256:9ca6883ce56b4e8da7e79ac18787889fa5206c79dcc67fb065376cd2fe03f342"
+                "sha256:51c75c4126074b472f746a24399ad32f6053d1b34b68d2fa41e558e6f4a98719",
+                "sha256:607c53218732647dff4acdfcd50cb62615cedf612e72d1724fb1a0cc6405b378"
             ],
-            "version": "==1.9.0"
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'",
+            "version": "==1.11.0"
         },
         "pygments": {
             "hashes": [
-                "sha256:647344a061c249a3b74e230c739f434d7ea4d8b1d5f3721bc0f3558049b38f44",
-                "sha256:ff7a40b4860b727ab48fad6360eb351cc1b33cbf9b15a0f689ca5353e9463324"
+                "sha256:44238f1b60a76d78fc8ca0528ee429702aae011c265fe6a8dd8b63049ae41c65",
+                "sha256:4e426f72023d88d03b2fa258de560726ce890ff3b630f88c21cbb8b2503b8c6a"
             ],
-            "version": "==2.6.1"
+            "markers": "python_version >= '3.5'",
+            "version": "==2.11.2"
         },
         "pyparsing": {
             "hashes": [
-                "sha256:c203ec8783bf771a155b207279b9bccb8dea02d8f0c9e5f8ead507bc3246ecc1",
-                "sha256:ef9d7589ef3c200abe66653d3f1ab1033c3c419ae9b9bdb1240a85b024efc88b"
+                "sha256:18ee9022775d270c55187733956460083db60b37d0d0fb357445f3094eed3eea",
+                "sha256:a6c06a88f252e6c322f65faf8f418b16213b51bdfaece0524c1c1bc30c63c484"
             ],
-            "version": "==2.4.7"
+            "markers": "python_version >= '3.6'",
+            "version": "==3.0.7"
         },
         "pytest": {
             "hashes": [
@@ -235,26 +245,37 @@
             "index": "pypi",
             "version": "==6.0.0"
         },
-        "six": {
+        "setuptools": {
             "hashes": [
-                "sha256:30639c035cdb23534cd4aa2dd52c3bf48f06e5f4a941509c8bafd8ce11080259",
-                "sha256:8b74bedcbbbaca38ff6d7491d76f2b06b3592611af620f8426e82dddb04a5ced"
+                "sha256:2404879cda71495fc4d5cbc445ed52fdaddf352b36e40be8dcc63147cb4edabe",
+                "sha256:68eb94073fc486091447fcb0501efd6560a0e5a1839ba249e5ff3c4c93f05f90"
             ],
-            "version": "==1.15.0"
+            "markers": "python_version >= '3.7'",
+            "version": "==60.5.0"
         },
         "toml": {
             "hashes": [
-                "sha256:926b612be1e5ce0634a2ca03470f95169cf16f939018233a670519cb4ac58b0f",
-                "sha256:bda89d5935c2eac546d648028b9901107a595863cb36bae0c73ac804a9b4ce88"
+                "sha256:806143ae5bfb6a3c6e736a764057db0e6a0e05e338b5630894a5f779cabb4f9b",
+                "sha256:b3bda1d108d5dd99f4a20d24d9c348e91c4db7ab1b749200bded2f839ccbe68f"
             ],
-            "version": "==0.10.1"
+            "markers": "python_version >= '2.6' and python_version not in '3.0, 3.1, 3.2, 3.3'",
+            "version": "==0.10.2"
         },
         "traitlets": {
             "hashes": [
-                "sha256:70b4c6a1d9019d7b4f6846832288f86998aa3b9207c6821f3578a6a6a467fe44",
-                "sha256:d023ee369ddd2763310e4c3eae1ff649689440d4ae59d7485eb4cfbbe3e359f7"
+                "sha256:059f456c5a7c1c82b98c2e8c799f39c9b8128f6d0d46941ee118daace9eb70c7",
+                "sha256:2d313cc50a42cd6c277e7d7dc8d4d7fedd06a2c215f78766ae7b1a66277e0033"
             ],
-            "version": "==4.3.3"
+            "markers": "python_version >= '3.7'",
+            "version": "==5.1.1"
+        },
+        "typing-extensions": {
+            "hashes": [
+                "sha256:4ca091dea149f945ec56afb48dae714f21e8692ef22a395223bcd328961b6a0e",
+                "sha256:7f001e5ac290a0c0401508864c7ec868be4e701886d5b573a9528ed3973d9d3b"
+            ],
+            "markers": "python_version < '3.8'",
+            "version": "==4.0.1"
         },
         "wcwidth": {
             "hashes": [
@@ -265,10 +286,11 @@
         },
         "zipp": {
             "hashes": [
-                "sha256:aa36550ff0c0b7ef7fa639055d797116ee891440eac1a56f378e2d3179e0320b",
-                "sha256:c599e4d75c98f6798c509911d08a22e6c021d074469042177c8c86fb92eefd96"
+                "sha256:9f50f446828eb9d45b267433fd3e9da8d801f614129124863f9c51ebceafb87d",
+                "sha256:b47250dd24f92b7dd6a0a8fc5244da14608f3ca90a5efcd37a3b1642fac9a375"
             ],
-            "version": "==3.1.0"
+            "markers": "python_version >= '3.7'",
+            "version": "==3.7.0"
         }
     }
 }
diff --git a/requirements.txt b/requirements.txt
index 944c4a5..2a3a83e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,12 @@
--i https://pypi.org/simple
+#
+# These requirements were autogenerated by pipenv
+# To regenerate from the project's Pipfile, run:
+#
+#    pipenv lock --requirements
+#
+
+-i https://pypi.org/simple/
 numpy==1.19.1
 pyopengl==3.1.5
-pyqt5-sip==12.8.0
+pyqt5-sip==12.9.0; python_version >= '3.5'
 pyqt5==5.15.0