Explicitly depend on gevent, since apparently depending on it as a Gunicorn 'extra' might not install it :/

Pipfile

@@ -44,5 +44,6 @@ django-computed-property = "*"
 docutils = "*"
 django-super-favicon = "*"
 django-redis = "*"
+gevent = "*"
 
 [dev-packages]

Pipfile.lock

@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "20d851bba1969d8787dfc9967508f3c9cb6dde62a1dd18baf57a7c85efbfd2f4"
+            "sha256": "563c547455b8d72ae6647f6837442dde75e79a94c622374b3034e9085eeaddbc"
         },
         "pipfile-spec": 6,
         "requires": {
@@ -304,6 +304,63 @@
             ],
             "version": "==0.16.0"
         },
+        "gevent": {
+            "hashes": [
+                "sha256:0901975628790e8a57fc92bb7062e5b856edea48c8de9caf36cfda14eae07329",
+                "sha256:1af93825db5753550fa8ff5ab2f2132e8733170b3f8d38347b34fa4a984cb624",
+                "sha256:2ff045a91509c35664c27a849c8cbf742a227f587b7cdbc88301e9c85dcaedff",
+                "sha256:33fa6759eabc9176ddbe0d29b66867a82e19a61f06eb7cfabbac35343c0ecf24",
+                "sha256:35790f1a3c8e431ada3471b70bb2105050009ea4beb15cbe41b86bc716a7ffa9",
+                "sha256:4791c8ae9c57d6f153354736e1ccab1e2baf6c8d9ae5a77a9ac90f41e2966b2d",
+                "sha256:4f098002126ebef7f2907188b6c8b09e5193161ce968847d9e6a8bc832b0db9a",
+                "sha256:552719cec4721673b8c7d2f9de666e3f7591b9b182f801ecaef1c76e638052aa",
+                "sha256:59e9237af027f8db85e5d78a9da2e328ae96f01d67a0d62abcecad3db7876908",
+                "sha256:60109741377367eef8ded9283a1bf629621b73acaf3e1e8aac9d1a0f50fa0f05",
+                "sha256:6892fabc9051e8c0a171d543b6536859aabeb6d169db79b2f45d64dc2a15808c",
+                "sha256:70558dd45c7a1f8046ba45792e489dd0f409bd8a3b7a0635ca9d3055223b3dff",
+                "sha256:74bce0c30bb2240e3d5d515ba8cb3eadf840c2bde7109a1979c7a26c9d0f5a6a",
+                "sha256:7f93b67b680f4a921f517294048d05f8f6f0ed5962b78d6685a6cf0fcd7d8202",
+                "sha256:81cb24e0f7bd9888596364e8d8ed0d65c2547c84884c67bb46d956faeed67396",
+                "sha256:833bebdc36bfeeedefc200ca9aee9b8eddd80f56b63ca1e886e18b97b1240edd",
+                "sha256:8a710eddb3e9e5f22bdbd458b5f211b94f59409ecd6896f15b9fee2cba266a59",
+                "sha256:9b492bb1a043540abb6e54fdb5537531e24962ca49c09f3b47dc4f9c37f6297c",
+                "sha256:a0ed8ba787b9c0c1c565c2675d71652e6c1e2d4e91f53530860d0303e867fe85",
+                "sha256:a16db4f56699ef07f0249b953ff949aae641e50b2bdc4710f11c0d8d9089b296",
+                "sha256:a66cf99f08da65c501826a19e30f5a6e7ba942fdd79baba5ce2d51eebaa13444",
+                "sha256:b67a10799923f9fed546ca5f8b93a2819c71a60132d7a97b4a13fbdab66b278a",
+                "sha256:b7e0e6400c2f3ce78a9ae1cdd55b53166feedd003d60c033863881227129a4d3",
+                "sha256:c35b29de49211014ec66d056fd4f9ba7a04795e2a654697f72879c0cf365d6d4",
+                "sha256:c9dd6534c46ed782e2d7236767cd07115cb29ce8670c2fc0794f264de9024fe0",
+                "sha256:de13a8e378103af84a8bf6015ad1d2761d46f29b8393e8dd6d9bb7cb51bbb713",
+                "sha256:deafd70d04ab62428d4e291e8e2c0fb22f38690e6a9f23a67ee6c304087634da",
+                "sha256:df52e06a2754c2d905aad75a7dc06a732c804d9edbc87f06f47c8f483ba98bca",
+                "sha256:fce894a64db3911897cdad6c37fbb23dfb18b7bf8b9cb8c00a8ea0a7253651c9"
+            ],
+            "index": "pypi",
+            "version": "==1.2.2"
+        },
+        "greenlet": {
+            "hashes": [
+                "sha256:09ef2636ea35782364c830f07127d6c7a70542b178268714a9a9ba16318e7e8b",
+                "sha256:0fef83d43bf87a5196c91e73cb9772f945a4caaff91242766c5916d1dd1381e4",
+                "sha256:1b7df09c6598f5cfb40f843ade14ed1eb40596e75cd79b6fa2efc750ba01bb01",
+                "sha256:1fff21a2da5f9e03ddc5bd99131a6b8edf3d7f9d6bc29ba21784323d17806ed7",
+                "sha256:42118bf608e0288e35304b449a2d87e2ba77d1e373e8aa221ccdea073de026fa",
+                "sha256:50643fd6d54fd919f9a0a577c5f7b71f5d21f0959ab48767bd4bb73ae0839500",
+                "sha256:58798b5d30054bb4f6cf0f712f08e6092df23a718b69000786634a265e8911a9",
+                "sha256:5b49b3049697aeae17ef7bf21267e69972d9e04917658b4e788986ea5cc518e8",
+                "sha256:75c413551a436b462d5929255b6dc9c0c3c2b25cbeaee5271a56c7fda8ca49c0",
+                "sha256:769b740aeebd584cd59232be84fdcaf6270b8adc356596cdea5b2152c82caaac",
+                "sha256:ad2383d39f13534f3ca5c48fe1fc0975676846dc39c2cece78c0f1f9891418e0",
+                "sha256:b417bb7ff680d43e7bd7a13e2e08956fa6acb11fd432f74c97b7664f8bdb6ec1",
+                "sha256:b6ef0cabaf5a6ecb5ac122e689d25ba12433a90c7b067b12e5f28bdb7fb78254",
+                "sha256:c2de19c88bdb0366c976cc125dca1002ec1b346989d59524178adfd395e62421",
+                "sha256:c7b04a6dc74087b1598de8d713198de4718fa30ec6cbb84959b26426c198e041",
+                "sha256:f8f2a0ae8de0b49c7b5b2daca4f150fdd9c1173e854df2cce3b04123244f9f45",
+                "sha256:fcfadaf4bf68a27e5dc2f42cbb2f4b4ceea9f05d1d0b8f7787e640bed2801634"
+            ],
+            "version": "==0.4.13"
+        },
         "gunicorn": {
             "hashes": [
                 "sha256:75af03c99389535f218cc596c7de74df4763803f7b63eb09d77e92b3956b36c6",
@@ -546,10 +603,10 @@
         },
         "pytest": {
             "hashes": [
-                "sha256:6266f87ab64692112e5477eba395cfedda53b1933ccd29478e671e73b420c19c",
+                "sha256:54713b26c97538db6ff0703a12b19aeaeb60b5e599de542e7fca0ec83b9038e8",
-                "sha256:fae491d1874f199537fd5872b5e1f0e74a009b979df9d53d1553fd03da1703e1"
+                "sha256:829230122facf05a5f81a6d4dfe6454a04978ea3746853b2b84567ecf8e5c526"
             ],
-            "version": "==3.5.0"
+            "version": "==3.5.1"
         },
         "pytest-django": {
             "hashes": [