diff --git a/Pipfile b/Pipfile
index ba1b3cd..12f7d6f 100644
--- a/Pipfile
+++ b/Pipfile
@@ -5,11 +5,12 @@ verify_ssl = true
 
 [dev-packages]
 pytest = "*"
+importlib-metadata = "*"
 
 [packages]
 psycopg2-binary = "*"
 
 [requires]
-python_version = "3.7"
+python_version = "3.9"
 
 [scripts]
diff --git a/Pipfile.lock b/Pipfile.lock
index f3798e3..3931ac2 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -1,11 +1,11 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "2732cd143c656d9b3256de0861c4df2eae10e59286513de09a99222ac596599d"
+            "sha256": "4798e0b88e6a8c8ce0cdae8f50e9ec4c99630aecd63b313ac1006344d94cef1f"
         },
         "pipfile-spec": 6,
         "requires": {
-            "python_version": "3.7"
+            "python_version": "3.9"
         },
         "sources": [
             {
@@ -18,127 +18,125 @@
     "default": {
         "psycopg2-binary": {
             "hashes": [
-                "sha256:040234f8a4a8dfd692662a8308d78f63f31a97e1c42d2480e5e6810c48966a29",
-                "sha256:086f7e89ec85a6704db51f68f0dcae432eff9300809723a6e8782c41c2f48e03",
-                "sha256:18ca813fdb17bc1db73fe61b196b05dd1ca2165b884dd5ec5568877cabf9b039",
-                "sha256:19dc39616850342a2a6db70559af55b22955f86667b5f652f40c0e99253d9881",
-                "sha256:2166e770cb98f02ed5ee2b0b569d40db26788e0bf2ec3ae1a0d864ea6f1d8309",
-                "sha256:3a2522b1d9178575acee4adf8fd9f979f9c0449b00b4164bb63c3475ea6528ed",
-                "sha256:3aa773580f85a28ffdf6f862e59cb5a3cc7ef6885121f2de3fca8d6ada4dbf3b",
-                "sha256:3b5deaa3ee7180585a296af33e14c9b18c218d148e735c7accf78130765a47e3",
-                "sha256:407af6d7e46593415f216c7f56ba087a9a42bd6dc2ecb86028760aa45b802bd7",
-                "sha256:4c3c09fb674401f630626310bcaf6cd6285daf0d5e4c26d6e55ca26a2734e39b",
-                "sha256:4c6717962247445b4f9e21c962ea61d2e884fc17df5ddf5e35863b016f8a1f03",
-                "sha256:50446fae5681fc99f87e505d4e77c9407e683ab60c555ec302f9ac9bffa61103",
-                "sha256:5057669b6a66aa9ca118a2a860159f0ee3acf837eda937bdd2a64f3431361a2d",
-                "sha256:5dd90c5438b4f935c9d01fcbad3620253da89d19c1f5fca9158646407ed7df35",
-                "sha256:659c815b5b8e2a55193ede2795c1e2349b8011497310bb936da7d4745652823b",
-                "sha256:69b13fdf12878b10dc6003acc8d0abf3ad93e79813fd5f3812497c1c9fb9be49",
-                "sha256:7a1cb80e35e1ccea3e11a48afe65d38744a0e0bde88795cc56a4d05b6e4f9d70",
-                "sha256:7e6e3c52e6732c219c07bd97fff6c088f8df4dae3b79752ee3a817e6f32e177e",
-                "sha256:7f42a8490c4fe854325504ce7a6e4796b207960dabb2cbafe3c3959cb00d1d7e",
-                "sha256:84156313f258eafff716b2961644a4483a9be44a5d43551d554844d15d4d224e",
-                "sha256:8578d6b8192e4c805e85f187bc530d0f52ba86c39172e61cd51f68fddd648103",
-                "sha256:890167d5091279a27e2505ff0e1fb273f8c48c41d35c5b92adbf4af80e6b2ed6",
-                "sha256:9aadff9032e967865f9778485571e93908d27dab21d0fdfdec0ca779bb6f8ad9",
-                "sha256:9f24f383a298a0c0f9b3113b982e21751a8ecde6615494a3f1470eb4a9d70e9e",
-                "sha256:a73021b44813b5c84eda4a3af5826dd72356a900bac9bd9dd1f0f81ee1c22c2f",
-                "sha256:afd96845e12638d2c44d213d4810a08f4dc4a563f9a98204b7428e567014b1cd",
-                "sha256:b73ddf033d8cd4cc9dfed6324b1ad2a89ba52c410ef6877998422fcb9c23e3a8",
-                "sha256:dbc5cd56fff1a6152ca59445178652756f4e509f672e49ccdf3d79c1043113a4",
-                "sha256:eac8a3499754790187bb00574ab980df13e754777d346f85e0ff6df929bcd964",
-                "sha256:eaed1c65f461a959284649e37b5051224f4db6ebdc84e40b5e65f2986f101a08"
+                "sha256:0deac2af1a587ae12836aa07970f5cb91964f05a7c6cdb69d8425ff4c15d4e2c",
+                "sha256:0e4dc3d5996760104746e6cfcdb519d9d2cd27c738296525d5867ea695774e67",
+                "sha256:11b9c0ebce097180129e422379b824ae21c8f2a6596b159c7659e2e5a00e1aa0",
+                "sha256:15978a1fbd225583dd8cdaf37e67ccc278b5abecb4caf6b2d6b8e2b948e953f6",
+                "sha256:1fabed9ea2acc4efe4671b92c669a213db744d2af8a9fc5d69a8e9bc14b7a9db",
+                "sha256:2dac98e85565d5688e8ab7bdea5446674a83a3945a8f416ad0110018d1501b94",
+                "sha256:42ec1035841b389e8cc3692277a0bd81cdfe0b65d575a2c8862cec7a80e62e52",
+                "sha256:6422f2ff0919fd720195f64ffd8f924c1395d30f9a495f31e2392c2efafb5056",
+                "sha256:6a32f3a4cb2f6e1a0b15215f448e8ce2da192fd4ff35084d80d5e39da683e79b",
+                "sha256:7312e931b90fe14f925729cde58022f5d034241918a5c4f9797cac62f6b3a9dd",
+                "sha256:7d92a09b788cbb1aec325af5fcba9fed7203897bbd9269d5691bb1e3bce29550",
+                "sha256:833709a5c66ca52f1d21d41865a637223b368c0ee76ea54ca5bad6f2526c7679",
+                "sha256:89705f45ce07b2dfa806ee84439ec67c5d9a0ef20154e0e475e2b2ed392a5b83",
+                "sha256:8cd0fb36c7412996859cb4606a35969dd01f4ea34d9812a141cd920c3b18be77",
+                "sha256:950bc22bb56ee6ff142a2cb9ee980b571dd0912b0334aa3fe0fe3788d860bea2",
+                "sha256:a0c50db33c32594305b0ef9abc0cb7db13de7621d2cadf8392a1d9b3c437ef77",
+                "sha256:a0eb43a07386c3f1f1ebb4dc7aafb13f67188eab896e7397aa1ee95a9c884eb2",
+                "sha256:aaa4213c862f0ef00022751161df35804127b78adf4a2755b9f991a507e425fd",
+                "sha256:ac0c682111fbf404525dfc0f18a8b5f11be52657d4f96e9fcb75daf4f3984859",
+                "sha256:ad20d2eb875aaa1ea6d0f2916949f5c08a19c74d05b16ce6ebf6d24f2c9f75d1",
+                "sha256:b4afc542c0ac0db720cf516dd20c0846f71c248d2b3d21013aa0d4ef9c71ca25",
+                "sha256:b8a3715b3c4e604bcc94c90a825cd7f5635417453b253499664f784fc4da0152",
+                "sha256:ba28584e6bca48c59eecbf7efb1576ca214b47f05194646b081717fa628dfddf",
+                "sha256:ba381aec3a5dc29634f20692349d73f2d21f17653bda1decf0b52b11d694541f",
+                "sha256:bd1be66dde2b82f80afb9459fc618216753f67109b859a361cf7def5c7968729",
+                "sha256:c2507d796fca339c8fb03216364cca68d87e037c1f774977c8fc377627d01c71",
+                "sha256:cec7e622ebc545dbb4564e483dd20e4e404da17ae07e06f3e780b2dacd5cee66",
+                "sha256:d14b140a4439d816e3b1229a4a525df917d6ea22a0771a2a78332273fd9528a4",
+                "sha256:d1b4ab59e02d9008efe10ceabd0b31e79519da6fb67f7d8e8977118832d0f449",
+                "sha256:d5227b229005a696cc67676e24c214740efd90b148de5733419ac9aaba3773da",
+                "sha256:e1f57aa70d3f7cc6947fd88636a481638263ba04a742b4a37dd25c373e41491a",
+                "sha256:e74a55f6bad0e7d3968399deb50f61f4db1926acf4a6d83beaaa7df986f48b1c",
+                "sha256:e82aba2188b9ba309fd8e271702bd0d0fc9148ae3150532bbb474f4590039ffb",
+                "sha256:ee69dad2c7155756ad114c02db06002f4cded41132cc51378e57aad79cc8e4f4",
+                "sha256:f5ab93a2cb2d8338b1674be43b442a7f544a0971da062a5da774ed40587f18f5"
             ],
             "index": "pypi",
-            "version": "==2.8.4"
+            "version": "==2.8.6"
         }
     },
     "develop": {
-        "atomicwrites": {
-            "hashes": [
-                "sha256:03472c30eb2c5d1ba9227e4c2ca66ab8287fbfbbda3888aa93dc2e28fc6811b4",
-                "sha256:75a9445bac02d8d058d5e1fe689654ba5a6556a1dfd8ce6ec55a0ed79866cfa6"
-            ],
-            "version": "==1.3.0"
-        },
         "attrs": {
             "hashes": [
-                "sha256:08a96c641c3a74e44eb59afb61a24f2cb9f4d7188748e76ba4bb5edfa3cb7d1c",
-                "sha256:f7b7ce16570fe9965acd6d30101a28f62fb4a7f9e926b3bbc9b61f8b04247e72"
+                "sha256:31b2eced602aa8423c2aea9c76a724617ed67cf9513173fd3a4f03e3a929c7e6",
+                "sha256:832aa3cde19744e49938b91fea06d69ecb9e649c93ba974535d08ad92164f700"
             ],
-            "version": "==19.3.0"
+            "version": "==20.3.0"
         },
         "importlib-metadata": {
             "hashes": [
-                "sha256:aa18d7378b00b40847790e7c27e11673d7fed219354109d0e7b9e5b25dc3ad26",
-                "sha256:d5f18a79777f3aa179c145737780282e27b508fc8fd688cb17c7a813e8bd39af"
+                "sha256:590690d61efdd716ff82c39ca9a9d4209252adfe288a4b5721181050acbd4175",
+                "sha256:d9b8a46a0885337627a6430db287176970fff18ad421becec1d64cfc763c2099"
             ],
-            "markers": "python_version < '3.8'",
-            "version": "==0.23"
+            "index": "pypi",
+            "version": "==3.1.0"
         },
-        "more-itertools": {
+        "iniconfig": {
             "hashes": [
-                "sha256:409cd48d4db7052af495b09dec721011634af3753ae1ef92d2b32f73a745f832",
-                "sha256:92b8c4b06dac4f0611c0729b2f2ede52b2e1bac1ab48f089c7ddc12e26bb60c4"
+                "sha256:011e24c64b7f47f6ebd835bb12a743f2fbe9a26d4cecaa7f53bc4f35ee9da8b3",
+                "sha256:bc3af051d7d14b2ee5ef9969666def0cd1a000e121eaea580d4a313df4b37f32"
             ],
-            "version": "==7.2.0"
+            "version": "==1.1.1"
         },
         "packaging": {
             "hashes": [
-                "sha256:28b924174df7a2fa32c1953825ff29c61e2f5e082343165438812f00d3a7fc47",
-                "sha256:d9551545c6d761f3def1677baf08ab2a3ca17c56879e70fecba2fc4dde4ed108"
+                "sha256:4357f74f47b9c12db93624a82154e9b120fa8293699949152b22065d556079f8",
+                "sha256:998416ba6962ae7fbd6596850b80e17859a5753ba17c32284f67bfff33784181"
             ],
-            "version": "==19.2"
+            "version": "==20.4"
         },
         "pluggy": {
             "hashes": [
-                "sha256:0db4b7601aae1d35b4a033282da476845aa19185c1e6964b25cf324b5e4ec3e6",
-                "sha256:fa5fa1622fa6dd5c030e9cad086fa19ef6a0cf6d7a2d12318e10cb49d6d68f34"
+                "sha256:15b2acde666561e1298d71b523007ed7364de07029219b604cf808bfa1c765b0",
+                "sha256:966c145cd83c96502c3c3868f50408687b38434af77734af1e9ca461a4081d2d"
             ],
-            "version": "==0.13.0"
+            "version": "==0.13.1"
         },
         "py": {
             "hashes": [
-                "sha256:64f65755aee5b381cea27766a3a147c3f15b9b6b9ac88676de66ba2ae36793fa",
-                "sha256:dc639b046a6e2cff5bbe40194ad65936d6ba360b52b3c3fe1d08a82dd50b5e53"
+                "sha256:366389d1db726cd2fcfc79732e75410e5fe4d31db13692115529d34069a043c2",
+                "sha256:9ca6883ce56b4e8da7e79ac18787889fa5206c79dcc67fb065376cd2fe03f342"
             ],
-            "version": "==1.8.0"
+            "version": "==1.9.0"
         },
         "pyparsing": {
             "hashes": [
-                "sha256:4acadc9a2b96c19fe00932a38ca63e601180c39a189a696abce1eaab641447e1",
-                "sha256:61b5ed888beab19ddccab3478910e2076a6b5a0295dffc43021890e136edf764"
+                "sha256:c203ec8783bf771a155b207279b9bccb8dea02d8f0c9e5f8ead507bc3246ecc1",
+                "sha256:ef9d7589ef3c200abe66653d3f1ab1033c3c419ae9b9bdb1240a85b024efc88b"
             ],
-            "version": "==2.4.4"
+            "version": "==2.4.7"
         },
         "pytest": {
             "hashes": [
-                "sha256:27abc3fef618a01bebb1f0d6d303d2816a99aa87a5968ebc32fe971be91eb1e6",
-                "sha256:58cee9e09242937e136dbb3dab466116ba20d6b7828c7620f23947f37eb4dae4"
+                "sha256:4288fed0d9153d9646bfcdf0c0428197dba1ecb27a33bb6e031d002fa88653fe",
+                "sha256:c0a7e94a8cdbc5422a51ccdad8e6f1024795939cc89159a0ae7f0b316ad3823e"
             ],
             "index": "pypi",
-            "version": "==5.2.2"
+            "version": "==6.1.2"
         },
         "six": {
             "hashes": [
-                "sha256:1f1b7d42e254082a9db6279deae68afb421ceba6158efa6131de7b3003ee93fd",
-                "sha256:30f610279e8b2578cab6db20741130331735c781b56053c59c4076da27f06b66"
+                "sha256:30639c035cdb23534cd4aa2dd52c3bf48f06e5f4a941509c8bafd8ce11080259",
+                "sha256:8b74bedcbbbaca38ff6d7491d76f2b06b3592611af620f8426e82dddb04a5ced"
             ],
-            "version": "==1.13.0"
+            "version": "==1.15.0"
         },
-        "wcwidth": {
+        "toml": {
             "hashes": [
-                "sha256:3df37372226d6e63e1b1e1eda15c594bca98a22d33a23832a90998faa96bc65e",
-                "sha256:f4ebe71925af7b40a864553f761ed559b43544f8f71746c2d756c7fe788ade7c"
+                "sha256:806143ae5bfb6a3c6e736a764057db0e6a0e05e338b5630894a5f779cabb4f9b",
+                "sha256:b3bda1d108d5dd99f4a20d24d9c348e91c4db7ab1b749200bded2f839ccbe68f"
             ],
-            "version": "==0.1.7"
+            "version": "==0.10.2"
         },
         "zipp": {
             "hashes": [
-                "sha256:3718b1cbcd963c7d4c5511a8240812904164b7f381b647143a89d3b98f9bcd8e",
-                "sha256:f06903e9f1f43b12d371004b4ac7b06ab39a44adc747266928ae6debfa7b3335"
+                "sha256:102c24ef8f171fd729d46599845e95c7ab894a4cf45f5de11a44cc7444fb1108",
+                "sha256:ed5eee1974372595f9e416cc7bbeeb12335201d8081ca8a0743c954d4446e5cb"
             ],
-            "version": "==0.6.0"
+            "version": "==3.4.0"
         }
     }
 }
diff --git a/docker-compose.yml b/docker-compose.yml
index 7c589cb..6bf516d 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -13,7 +13,7 @@ services:
 
   db: &db
     container_name: "sql_test_db"
-    image: "mdillon/postgis:10"
+    image: "mdillon/postgis:11"
     volumes:
       - "./sql:/sql"
     env_file: