diff --git a/Pipfile b/Pipfile
index 410b41f..255f1ae 100644
--- a/Pipfile
+++ b/Pipfile
@@ -27,7 +27,7 @@ pre-commit = "==2.13.0"
 reuse = "==0.14.0"
 
 [requires]
-python_version = "3.8"
+python_version = "3.11"
 
 [scripts]
 clean = "rm data/ki.sqlite"
diff --git a/Pipfile.lock b/Pipfile.lock
index 53f5615..f84262a 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -1,11 +1,11 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "24b04bf88bb4cc35b108b48aa38fe2106600344d541806fc462d5bb71f6ee4b8"
+            "sha256": "8aca1e3caa1a8154ee74b171408de204be9bb26b54f1e85bad2669d646768e36"
         },
         "pipfile-spec": 6,
         "requires": {
-            "python_version": "3.8"
+            "python_version": "3.11"
         },
         "sources": [
             {
@@ -66,70 +66,6 @@
             "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
             "version": "==2.5.1"
         },
-        "greenlet": {
-            "hashes": [
-                "sha256:01bc7ea167cf943b4c802068e178bbf70ae2e8c080467070d01bfa02f337ee67",
-                "sha256:0448abc479fab28b00cb472d278828b3ccca164531daab4e970a0458786055d6",
-                "sha256:086152f8fbc5955df88382e8a75984e2bb1c892ad2e3c80a2508954e52295257",
-                "sha256:098d86f528c855ead3479afe84b49242e174ed262456c342d70fc7f972bc13c4",
-                "sha256:149e94a2dd82d19838fe4b2259f1b6b9957d5ba1b25640d2380bea9c5df37676",
-                "sha256:1551a8195c0d4a68fac7a4325efac0d541b48def35feb49d803674ac32582f61",
-                "sha256:15d79dd26056573940fcb8c7413d84118086f2ec1a8acdfa854631084393efcc",
-                "sha256:1996cb9306c8595335bb157d133daf5cf9f693ef413e7673cb07e3e5871379ca",
-                "sha256:1a7191e42732df52cb5f39d3527217e7ab73cae2cb3694d241e18f53d84ea9a7",
-                "sha256:1ea188d4f49089fc6fb283845ab18a2518d279c7cd9da1065d7a84e991748728",
-                "sha256:1f672519db1796ca0d8753f9e78ec02355e862d0998193038c7073045899f305",
-                "sha256:2516a9957eed41dd8f1ec0c604f1cdc86758b587d964668b5b196a9db5bfcde6",
-                "sha256:2797aa5aedac23af156bbb5a6aa2cd3427ada2972c828244eb7d1b9255846379",
-                "sha256:2dd6e660effd852586b6a8478a1d244b8dc90ab5b1321751d2ea15deb49ed414",
-                "sha256:3ddc0f794e6ad661e321caa8d2f0a55ce01213c74722587256fb6566049a8b04",
-                "sha256:3ed7fb269f15dc662787f4119ec300ad0702fa1b19d2135a37c2c4de6fadfd4a",
-                "sha256:419b386f84949bf0e7c73e6032e3457b82a787c1ab4a0e43732898a761cc9dbf",
-                "sha256:43374442353259554ce33599da8b692d5aa96f8976d567d4badf263371fbe491",
-                "sha256:52f59dd9c96ad2fc0d5724107444f76eb20aaccb675bf825df6435acb7703559",
-                "sha256:57e8974f23e47dac22b83436bdcf23080ade568ce77df33159e019d161ce1d1e",
-                "sha256:5b51e85cb5ceda94e79d019ed36b35386e8c37d22f07d6a751cb659b180d5274",
-                "sha256:649dde7de1a5eceb258f9cb00bdf50e978c9db1b996964cd80703614c86495eb",
-                "sha256:64d7675ad83578e3fc149b617a444fab8efdafc9385471f868eb5ff83e446b8b",
-                "sha256:68834da854554926fbedd38c76e60c4a2e3198c6fbed520b106a8986445caaf9",
-                "sha256:6b66c9c1e7ccabad3a7d037b2bcb740122a7b17a53734b7d72a344ce39882a1b",
-                "sha256:70fb482fdf2c707765ab5f0b6655e9cfcf3780d8d87355a063547b41177599be",
-                "sha256:7170375bcc99f1a2fbd9c306f5be8764eaf3ac6b5cb968862cad4c7057756506",
-                "sha256:73a411ef564e0e097dbe7e866bb2dda0f027e072b04da387282b02c308807405",
-                "sha256:77457465d89b8263bca14759d7c1684df840b6811b2499838cc5b040a8b5b113",
-                "sha256:7f362975f2d179f9e26928c5b517524e89dd48530a0202570d55ad6ca5d8a56f",
-                "sha256:81bb9c6d52e8321f09c3d165b2a78c680506d9af285bfccbad9fb7ad5a5da3e5",
-                "sha256:881b7db1ebff4ba09aaaeae6aa491daeb226c8150fc20e836ad00041bcb11230",
-                "sha256:894393ce10ceac937e56ec00bb71c4c2f8209ad516e96033e4b3b1de270e200d",
-                "sha256:99bf650dc5d69546e076f413a87481ee1d2d09aaaaaca058c9251b6d8c14783f",
-                "sha256:9da2bd29ed9e4f15955dd1595ad7bc9320308a3b766ef7f837e23ad4b4aac31a",
-                "sha256:afaff6cf5200befd5cec055b07d1c0a5a06c040fe5ad148abcd11ba6ab9b114e",
-                "sha256:b1b5667cced97081bf57b8fa1d6bfca67814b0afd38208d52538316e9422fc61",
-                "sha256:b37eef18ea55f2ffd8f00ff8fe7c8d3818abd3e25fb73fae2ca3b672e333a7a6",
-                "sha256:b542be2440edc2d48547b5923c408cbe0fc94afb9f18741faa6ae970dbcb9b6d",
-                "sha256:b7dcbe92cc99f08c8dd11f930de4d99ef756c3591a5377d1d9cd7dd5e896da71",
-                "sha256:b7f009caad047246ed379e1c4dbcb8b020f0a390667ea74d2387be2998f58a22",
-                "sha256:bba5387a6975598857d86de9eac14210a49d554a77eb8261cc68b7d082f78ce2",
-                "sha256:c5e1536de2aad7bf62e27baf79225d0d64360d4168cf2e6becb91baf1ed074f3",
-                "sha256:c5ee858cfe08f34712f548c3c363e807e7186f03ad7a5039ebadb29e8c6be067",
-                "sha256:c9db1c18f0eaad2f804728c67d6c610778456e3e1cc4ab4bbd5eeb8e6053c6fc",
-                "sha256:d353cadd6083fdb056bb46ed07e4340b0869c305c8ca54ef9da3421acbdf6881",
-                "sha256:d46677c85c5ba00a9cb6f7a00b2bfa6f812192d2c9f7d9c4f6a55b60216712f3",
-                "sha256:d4d1ac74f5c0c0524e4a24335350edad7e5f03b9532da7ea4d3c54d527784f2e",
-                "sha256:d73a9fe764d77f87f8ec26a0c85144d6a951a6c438dfe50487df5595c6373eac",
-                "sha256:da70d4d51c8b306bb7a031d5cff6cc25ad253affe89b70352af5f1cb68e74b53",
-                "sha256:daf3cb43b7cf2ba96d614252ce1684c1bccee6b2183a01328c98d36fcd7d5cb0",
-                "sha256:dca1e2f3ca00b84a396bc1bce13dd21f680f035314d2379c4160c98153b2059b",
-                "sha256:dd4f49ae60e10adbc94b45c0b5e6a179acc1736cf7a90160b404076ee283cf83",
-                "sha256:e1f145462f1fa6e4a4ae3c0f782e580ce44d57c8f2c7aae1b6fa88c0b2efdb41",
-                "sha256:e3391d1e16e2a5a1507d83e4a8b100f4ee626e8eca43cf2cadb543de69827c4c",
-                "sha256:fcd2469d6a2cf298f198f0487e0a5b1a47a42ca0fa4dfd1b6862c999f018ebbf",
-                "sha256:fd096eb7ffef17c456cfa587523c5f92321ae02427ff955bebe9e3c63bc9f0da",
-                "sha256:fe754d231288e1e64323cfad462fcee8f0288654c10bdf4f603a39ed923bef33"
-            ],
-            "markers": "python_version >= '3' and platform_machine == 'aarch64' or (platform_machine == 'ppc64le' or (platform_machine == 'x86_64' or (platform_machine == 'amd64' or (platform_machine == 'AMD64' or (platform_machine == 'win32' or platform_machine == 'WIN32')))))",
-            "version": "==3.0.3"
-        },
         "importlib-metadata": {
             "hashes": [
                 "sha256:66f342cc6ac9818fc6ff340576acd24d65ba0b3efabb2b4ac08b598965a4a2f1",