diff --git a/Pipfile b/Pipfile
new file mode 100644
index 0000000..aedb86d
--- /dev/null
+++ b/Pipfile
@@ -0,0 +1,11 @@
+[[source]]
+url = "https://pypi.org/simple"
+verify_ssl = true
+name = "pypi"
+
+[packages]
+advent-of-code-data = "*"
+black = "*"
+
+[requires]
+python_version = ">=3.10"
diff --git a/Pipfile.lock b/Pipfile.lock
new file mode 100644
index 0000000..c668277
--- /dev/null
+++ b/Pipfile.lock
@@ -0,0 +1,141 @@
+{
+    "_meta": {
+        "hash": {
+            "sha256": "75e5e305a53ca8155d7ed18e6d764f46789d737487f9bea8f0891f6a56726e8d"
+        },
+        "pipfile-spec": 6,
+        "requires": {
+            "python_version": "3.11"
+        },
+        "sources": [
+            {
+                "name": "pypi",
+                "url": "https://pypi.org/simple",
+                "verify_ssl": true
+            }
+        ]
+    },
+    "default": {
+        "advent-of-code-data": {
+            "hashes": [
+                "sha256:552e7886c193c52cac71f14ef55c5d7cc1c7ebd0e9e2271be37b01df739f92cc",
+                "sha256:823be87d393b4cd9eef7dc123fdf1078c979b6ad898d8c54bc7b95ff10582209"
+            ],
+            "index": "pypi",
+            "version": "==1.3.1"
+        },
+        "beautifulsoup4": {
+            "hashes": [
+                "sha256:58d5c3d29f5a36ffeb94f02f0d786cd53014cf9b3b3951d42e0080d8a9498d30",
+                "sha256:ad9aa55b65ef2808eb405f46cf74df7fcb7044d5cbc26487f96eb2ef2e436693"
+            ],
+            "markers": "python_full_version >= '3.6.0'",
+            "version": "==4.11.1"
+        },
+        "certifi": {
+            "hashes": [
+                "sha256:0d9c601124e5a6ba9712dbc60d9c53c21e34f5f641fe83002317394311bdce14",
+                "sha256:90c1a32f1d68f940488354e36370f6cca89f0f106db09518524c88d6ed83f382"
+            ],
+            "markers": "python_version >= '3.6'",
+            "version": "==2022.9.24"
+        },
+        "charset-normalizer": {
+            "hashes": [
+                "sha256:5a3d016c7c547f69d6f81fb0db9449ce888b418b5b9952cc5e6e66843e9dd845",
+                "sha256:83e9a75d1911279afd89352c68b45348559d1fc0506b054b346651b5e7fee29f"
+            ],
+            "markers": "python_full_version >= '3.6.0'",
+            "version": "==2.1.1"
+        },
+        "idna": {
+            "hashes": [
+                "sha256:814f528e8dead7d329833b91c5faa87d60bf71824cd12a7530b5526063d02cb4",
+                "sha256:90b77e79eaa3eba6de819a0c442c0b4ceefc341a7a2ab77d7562bf49f425c5c2"
+            ],
+            "markers": "python_version >= '3.5'",
+            "version": "==3.4"
+        },
+        "pebble": {
+            "hashes": [
+                "sha256:8274aa0959f387b368ede47666129cbe5d123f276a1bd9cafe77e020194b2141",
+                "sha256:bdcfd9ea7e0aedb895b204177c19e6d6543d9962f4e3402ebab2175004863da8"
+            ],
+            "markers": "python_version >= '3.6'",
+            "version": "==5.0.3"
+        },
+        "python-dateutil": {
+            "hashes": [
+                "sha256:0123cacc1627ae19ddf3c27a5de5bd67ee4586fbdd6440d9748f8abb483d3e86",
+                "sha256:961d03dc3453ebbc59dbdea9e4e11c5651520a876d0f4db161e8674aae935da9"
+            ],
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2'",
+            "version": "==2.8.2"
+        },
+        "pytz-deprecation-shim": {
+            "hashes": [
+                "sha256:8314c9692a636c8eb3bda879b9f119e350e93223ae83e70e80c31675a0fdc1a6",
+                "sha256:af097bae1b616dde5c5744441e2ddc69e74dfdcb0c263129610d85b87445a59d"
+            ],
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4, 3.5'",
+            "version": "==0.1.0.post0"
+        },
+        "requests": {
+            "hashes": [
+                "sha256:7c5599b102feddaa661c826c56ab4fee28bfd17f5abca1ebbe3e7f19d7c97983",
+                "sha256:8fefa2a1a1365bf5520aac41836fbee479da67864514bdb821f31ce07ce65349"
+            ],
+            "markers": "python_version >= '3.7' and python_version < '4'",
+            "version": "==2.28.1"
+        },
+        "six": {
+            "hashes": [
+                "sha256:1e61c37477a1626458e36f7b1d82aa5c9b094fa4802892072e49de9c60c4c926",
+                "sha256:8abb2f1d86890a2dfb989f9a77cfcfd3e47c2a354b01111771326f8aa26e0254"
+            ],
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2'",
+            "version": "==1.16.0"
+        },
+        "soupsieve": {
+            "hashes": [
+                "sha256:3b2503d3c7084a42b1ebd08116e5f81aadfaea95863628c80a3b774a11b7c759",
+                "sha256:fc53893b3da2c33de295667a0e19f078c14bf86544af307354de5fcf12a3f30d"
+            ],
+            "markers": "python_version >= '3.6'",
+            "version": "==2.3.2.post1"
+        },
+        "termcolor": {
+            "hashes": [
+                "sha256:67cee2009adc6449c650f6bcf3bdeed00c8ba53a8cda5362733c53e0a39fb70b",
+                "sha256:fa852e957f97252205e105dd55bbc23b419a70fec0085708fc0515e399f304fd"
+            ],
+            "markers": "python_version >= '3.7'",
+            "version": "==2.1.1"
+        },
+        "tzdata": {
+            "hashes": [
+                "sha256:2b88858b0e3120792a3c0635c23daf36a7d7eeeca657c323da299d2094402a0d",
+                "sha256:fe5f866eddd8b96e9fcba978f8e503c909b19ea7efda11e52e39494bad3a7bfa"
+            ],
+            "markers": "python_version >= '3.6'",
+            "version": "==2022.7"
+        },
+        "tzlocal": {
+            "hashes": [
+                "sha256:89885494684c929d9191c57aa27502afc87a579be5cdd3225c77c463ea043745",
+                "sha256:ee5842fa3a795f023514ac2d801c4a81d1743bbe642e3940143326b3a00addd7"
+            ],
+            "markers": "python_version >= '3.6'",
+            "version": "==4.2"
+        },
+        "urllib3": {
+            "hashes": [
+                "sha256:47cc05d99aaa09c9e72ed5809b60e7ba354e64b59c9c173ac3018642d8bb41fc",
+                "sha256:c083dd0dce68dbfbe1129d5271cb90f9447dea7d52097c6e0126120c521ddea8"
+            ],
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4, 3.5'",
+            "version": "==1.26.13"
+        }
+    },
+    "develop": {}
+}
diff --git a/README.md b/README.md
index 3ce75b5..f1fa1b2 100644
--- a/README.md
+++ b/README.md
@@ -13,8 +13,16 @@ Solutions for the advent of code 2022
 - After a successful login extract your session token from your browser
 - Create a `.env` file and make sure to export the environment variable below
 - The lib will outomatically work if the environment variable is present
+- `Pipenv` automatically loads `.env` files
 
 ```bash
 $ cat .env
 export AOC_SESSION="53616c..."
 ```
+
+## how to get a pipenv shell
+
+```bash
+$ pipenv install
+$ pipenv shell
+```
diff --git a/requirements.txt b/requirements.txt
deleted file mode 100644
index 6f42086..0000000
--- a/requirements.txt
+++ /dev/null
@@ -1 +0,0 @@
-advent-of-code-data