diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c24dc61a2..daaadb42b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -14,7 +14,11 @@ on:
       - 'translations**'
 
 env:
+  # This is the version of pipenv all the steps will use
+  # If changing this, change Dockerfile
   DEFAULT_PIP_ENV_VERSION: "2022.11.30"
+  # This is the default version of Python to use in most steps
+  # If changing this, change Dockerfile
   DEFAULT_PYTHON_VERSION: "3.9"
 
 jobs:
diff --git a/.python-version b/.python-version
new file mode 100644
index 000000000..84691ddea
--- /dev/null
+++ b/.python-version
@@ -0,0 +1 @@
+3.8.15
diff --git a/Pipfile b/Pipfile
index 4309f5a2b..9d2e86112 100644
--- a/Pipfile
+++ b/Pipfile
@@ -44,9 +44,6 @@ channels = "~=3.0"
 uvicorn = {extras = ["standard"], version = "*"}
 concurrent-log-handler = "*"
 "pdfminer.six" = "*"
-"backports.zoneinfo" = {version = "*", markers = "python_version < '3.9'"}
-"importlib-resources" = {version = "*", markers = "python_version < '3.9'"}
-zipp = {version = "*", markers = "python_version < '3.9'"}
 pyzbar = "*"
 mysqlclient = "*"
 celery = {extras = ["redis"], version = "*"}
diff --git a/Pipfile.lock b/Pipfile.lock
index 5d48c18dd..8e487b7d4 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "cda8a69041c65176017700e723e8ae57849e0a98a0d2f02323c0078064e91db9"
+            "sha256": "5d6da0ede3fc7dd05c9a1d836bf8786285b10b6134e763d06ee90d6e1ccb2be7"
         },
         "pipfile-spec": 6,
         "requires": {},
@@ -99,6 +99,7 @@
                 "sha256:f04e857b59d9d1ccc39ce2da1021d196e47234873820cbeaad210724b1ee28ac",
                 "sha256:fadbfe37f74051d024037f223b8e001611eac868b5c5b06144ef4d8b799862f2"
             ],
+            "index": "pypi",
             "markers": "python_version < '3.9'",
             "version": "==0.2.1"
         },
@@ -1650,7 +1651,7 @@
                 "sha256:1511434bb92bf8dd198c12b1cc812e800d4181cfcb867674e0f8279cc93087aa",
                 "sha256:16fa4864408f655d35ec496218b85f79b3437c829e93320c7c9215ccfd92489e"
             ],
-            "markers": "python_version >= '3.7'",
+            "markers": "python_version < '3.10'",
             "version": "==4.4.0"
         },
         "tzdata": {
@@ -1899,7 +1900,7 @@
                 "sha256:83a28fcb75844b5c0cdaf5aa4003c2d728c77e05f5aeabe8e95e56727005fbaa",
                 "sha256:a7a22e05929290a67401440b39690ae6563279bced5f314609d9d03798f56766"
             ],
-            "markers": "python_version < '3.9'",
+            "markers": "python_version < '3.10'",
             "version": "==3.11.0"
         },
         "zope.interface": {
@@ -2160,6 +2161,14 @@
             "index": "pypi",
             "version": "==4.3.1"
         },
+        "importlib-metadata": {
+            "hashes": [
+                "sha256:7efb448ec9a5e313a57655d35aa54cd3e01b7e1fbcf72dce1bf06119420f5bad",
+                "sha256:e354bedeb60efa6affdcc8ae121b73544a7aa74156d047311948f6d711cd378d"
+            ],
+            "markers": "python_version < '3.10'",
+            "version": "==6.0.0"
+        },
         "iniconfig": {
             "hashes": [
                 "sha256:011e24c64b7f47f6ebd835bb12a743f2fbe9a26d4cecaa7f53bc4f35ee9da8b3",
@@ -2736,6 +2745,14 @@
             "markers": "python_full_version < '3.11.0a7'",
             "version": "==2.0.1"
         },
+        "typing-extensions": {
+            "hashes": [
+                "sha256:1511434bb92bf8dd198c12b1cc812e800d4181cfcb867674e0f8279cc93087aa",
+                "sha256:16fa4864408f655d35ec496218b85f79b3437c829e93320c7c9215ccfd92489e"
+            ],
+            "markers": "python_version < '3.10'",
+            "version": "==4.4.0"
+        },
         "urllib3": {
             "hashes": [
                 "sha256:47cc05d99aaa09c9e72ed5809b60e7ba354e64b59c9c173ac3018642d8bb41fc",
@@ -2785,6 +2802,14 @@
             ],
             "index": "pypi",
             "version": "==2.2.0"
+        },
+        "zipp": {
+            "hashes": [
+                "sha256:83a28fcb75844b5c0cdaf5aa4003c2d728c77e05f5aeabe8e95e56727005fbaa",
+                "sha256:a7a22e05929290a67401440b39690ae6563279bced5f314609d9d03798f56766"
+            ],
+            "markers": "python_version < '3.10'",
+            "version": "==3.11.0"
         }
     }
 }
diff --git a/src/documents/parsers.py b/src/documents/parsers.py
index 240d60e7f..cd17a33b1 100644
--- a/src/documents/parsers.py
+++ b/src/documents/parsers.py
@@ -6,7 +6,7 @@ import re
 import shutil
 import subprocess
 import tempfile
-from functools import cache
+from functools import lru_cache
 from typing import Iterator
 from typing import Match
 from typing import Optional
@@ -45,7 +45,7 @@ DATE_REGEX = re.compile(
 logger = logging.getLogger("paperless.parsing")
 
 
-@cache
+@lru_cache(maxsize=8)
 def is_mime_type_supported(mime_type: str) -> bool:
     """
     Returns True if the mime type is supported, False otherwise
@@ -53,7 +53,7 @@ def is_mime_type_supported(mime_type: str) -> bool:
     return get_parser_class_for_mime_type(mime_type) is not None
 
 
-@cache
+@lru_cache(maxsize=8)
 def get_default_file_extension(mime_type: str) -> str:
     """
     Returns the default file extension for a mimetype, or
@@ -73,7 +73,7 @@ def get_default_file_extension(mime_type: str) -> str:
         return ""
 
 
-@cache
+@lru_cache(maxsize=8)
 def is_file_ext_supported(ext: str) -> bool:
     """
     Returns True if the file extension is supported, False otherwise